/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/sorting_bubblesort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:48:25,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:48:25,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:48:25,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:48:25,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:48:25,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:48:25,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:48:25,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:48:25,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:48:25,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:48:25,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:48:25,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:48:25,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:48:25,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:48:25,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:48:25,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:48:25,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:48:25,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:48:25,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:48:25,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:48:25,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:48:25,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:48:25,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:48:25,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:48:25,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 23:48:25,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:48:25,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:48:25,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:48:25,248 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 23:48:25,298 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:48:25,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:48:25,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:48:25,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:48:25,302 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:48:25,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:48:25,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:48:25,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:48:25,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:48:25,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:48:25,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:48:25,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:48:25,305 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:48:25,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:48:25,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:48:25,306 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:48:25,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:48:25,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:48:25,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:48:25,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:48:25,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:48:25,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:48:25,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:48:25,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:48:25,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:48:25,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:48:25,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:48:25,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:48:25,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:48:25,769 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:48:25,770 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:48:25,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2020-12-22 23:48:25,853 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0a765f637/5c6bbb3d4d1c406f81998dd04dc520b0/FLAGe75615d8b [2020-12-22 23:48:26,427 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:48:26,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2020-12-22 23:48:26,435 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0a765f637/5c6bbb3d4d1c406f81998dd04dc520b0/FLAGe75615d8b [2020-12-22 23:48:26,803 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0a765f637/5c6bbb3d4d1c406f81998dd04dc520b0 [2020-12-22 23:48:26,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:48:26,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:48:26,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:48:26,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:48:26,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:48:26,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:26" (1/1) ... [2020-12-22 23:48:26,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e7702a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:26, skipping insertion in model container [2020-12-22 23:48:26,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:26" (1/1) ... [2020-12-22 23:48:26,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:48:26,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:48:27,027 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/sorting_bubblesort_ground-1.i[820,833] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~swapped~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[BinaryExpression[ARITHMINUS,IdentifierExpression[~i~0,],IntegerLiteral[1]]]] left hand side expression in assignment: lhs: VariableLHS[~swapped~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-22 23:48:27,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:48:27,057 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:48:27,073 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/sorting_bubblesort_ground-1.i[820,833] 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: lhs: VariableLHS[~swapped~0,] 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[~i~0,]]]]] 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],BinaryExpression[ARITHMINUS,IdentifierExpression[~i~0,],IntegerLiteral[1]]]]]] left hand side expression in assignment: lhs: VariableLHS[~swapped~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-22 23:48:27,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:48:27,100 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:48:27,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27 WrapperNode [2020-12-22 23:48:27,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:48:27,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:48:27,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:48:27,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:48:27,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:48:27,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:48:27,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:48:27,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:48:27,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:48:27,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:48:27,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:48:27,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:48:27,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (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 23:48:27,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:48:27,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:48:27,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:48:27,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:48:27,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:48:27,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:48:27,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:48:27,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:48:27,590 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 23:48:27,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:27 BoogieIcfgContainer [2020-12-22 23:48:27,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:48:27,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:48:27,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:48:27,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:48:27,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:48:26" (1/3) ... [2020-12-22 23:48:27,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68629af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:27, skipping insertion in model container [2020-12-22 23:48:27,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (2/3) ... [2020-12-22 23:48:27,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68629af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:27, skipping insertion in model container [2020-12-22 23:48:27,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:27" (3/3) ... [2020-12-22 23:48:27,616 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2020-12-22 23:48:27,669 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:48:27,674 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 23:48:27,696 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 23:48:27,726 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:48:27,726 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:48:27,726 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:48:27,726 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:48:27,726 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:48:27,727 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:48:27,727 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:48:27,727 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:48:27,742 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-22 23:48:27,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 23:48:27,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:27,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:27,749 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:27,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:27,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2020-12-22 23:48:27,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:27,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801297087] [2020-12-22 23:48:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:27,951 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 23:48:27,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801297087] [2020-12-22 23:48:27,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:27,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:48:27,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504218340] [2020-12-22 23:48:27,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:48:27,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:27,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:48:27,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:48:27,976 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-12-22 23:48:28,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:28,011 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2020-12-22 23:48:28,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:48:28,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-22 23:48:28,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:28,023 INFO L225 Difference]: With dead ends: 42 [2020-12-22 23:48:28,023 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 23:48:28,027 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 23:48:28,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 23:48:28,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-22 23:48:28,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 23:48:28,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-22 23:48:28,065 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2020-12-22 23:48:28,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:28,065 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-22 23:48:28,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:48:28,066 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-22 23:48:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 23:48:28,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:28,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:28,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:48:28,067 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:28,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:28,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2020-12-22 23:48:28,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:28,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553444837] [2020-12-22 23:48:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,122 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 23:48:28,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553444837] [2020-12-22 23:48:28,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429383911] [2020-12-22 23:48:28,123 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 23:48:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 23:48:28,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:28,256 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 23:48:28,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:48:28,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 23:48:28,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410651545] [2020-12-22 23:48:28,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:48:28,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:28,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:48:28,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:28,261 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2020-12-22 23:48:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:28,278 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2020-12-22 23:48:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:48:28,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-22 23:48:28,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:28,280 INFO L225 Difference]: With dead ends: 32 [2020-12-22 23:48:28,280 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 23:48:28,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 23:48:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 23:48:28,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 23:48:28,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 23:48:28,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2020-12-22 23:48:28,287 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2020-12-22 23:48:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:28,287 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2020-12-22 23:48:28,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:48:28,287 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2020-12-22 23:48:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 23:48:28,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:28,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:28,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 23:48:28,504 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:28,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:28,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2020-12-22 23:48:28,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:28,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86548114] [2020-12-22 23:48:28,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,587 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 23:48:28,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86548114] [2020-12-22 23:48:28,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563998322] [2020-12-22 23:48:28,588 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 23:48:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 23:48:28,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:28,653 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 23:48:28,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:48:28,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 23:48:28,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464127621] [2020-12-22 23:48:28,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:48:28,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:28,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:48:28,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:28,656 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 3 states. [2020-12-22 23:48:28,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:28,674 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2020-12-22 23:48:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:48:28,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-22 23:48:28,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:28,676 INFO L225 Difference]: With dead ends: 44 [2020-12-22 23:48:28,676 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 23:48:28,677 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 23:48:28,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 23:48:28,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-22 23:48:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 23:48:28,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2020-12-22 23:48:28,682 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2020-12-22 23:48:28,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:28,683 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2020-12-22 23:48:28,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:48:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2020-12-22 23:48:28,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 23:48:28,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:28,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:28,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:28,890 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:28,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:28,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2020-12-22 23:48:28,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:28,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282455008] [2020-12-22 23:48:28,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 23:48:28,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282455008] [2020-12-22 23:48:28,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240549170] [2020-12-22 23:48:28,959 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 23:48:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:48:29,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 23:48:29,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:29,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:48:29,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832993292] [2020-12-22 23:48:29,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:48:29,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:29,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:48:29,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:29,073 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2020-12-22 23:48:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:29,101 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-12-22 23:48:29,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:29,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-22 23:48:29,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:29,104 INFO L225 Difference]: With dead ends: 46 [2020-12-22 23:48:29,104 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 23:48:29,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 23:48:29,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 23:48:29,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-22 23:48:29,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 23:48:29,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-12-22 23:48:29,121 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2020-12-22 23:48:29,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:29,121 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-12-22 23:48:29,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:48:29,121 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-12-22 23:48:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 23:48:29,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:29,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:29,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:29,337 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:29,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:29,339 INFO L82 PathProgramCache]: Analyzing trace with hash 784472297, now seen corresponding path program 2 times [2020-12-22 23:48:29,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:29,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281086387] [2020-12-22 23:48:29,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 23:48:29,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281086387] [2020-12-22 23:48:29,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529460882] [2020-12-22 23:48:29,381 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 23:48:29,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:29,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:29,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:48:29,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 23:48:29,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:29,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 23:48:29,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161274170] [2020-12-22 23:48:29,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:48:29,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:29,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:48:29,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:48:29,478 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2020-12-22 23:48:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:29,545 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2020-12-22 23:48:29,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:48:29,546 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-22 23:48:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:29,547 INFO L225 Difference]: With dead ends: 57 [2020-12-22 23:48:29,547 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 23:48:29,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 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 23:48:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 23:48:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-12-22 23:48:29,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 23:48:29,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-12-22 23:48:29,565 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 19 [2020-12-22 23:48:29,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:29,565 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-12-22 23:48:29,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:48:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-12-22 23:48:29,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 23:48:29,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:29,568 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:29,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:29,783 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:29,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:29,785 INFO L82 PathProgramCache]: Analyzing trace with hash -201702437, now seen corresponding path program 3 times [2020-12-22 23:48:29,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:29,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741101342] [2020-12-22 23:48:29,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 23:48:29,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741101342] [2020-12-22 23:48:29,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580698259] [2020-12-22 23:48:29,898 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 23:48:29,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 23:48:29,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:29,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:48:29,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 23:48:30,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:30,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2020-12-22 23:48:30,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685320874] [2020-12-22 23:48:30,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 23:48:30,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:30,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 23:48:30,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:48:30,031 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 9 states. [2020-12-22 23:48:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:30,088 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2020-12-22 23:48:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:48:30,088 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-12-22 23:48:30,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:30,089 INFO L225 Difference]: With dead ends: 70 [2020-12-22 23:48:30,089 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 23:48:30,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:48:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 23:48:30,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-12-22 23:48:30,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 23:48:30,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-12-22 23:48:30,097 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 24 [2020-12-22 23:48:30,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:30,098 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-12-22 23:48:30,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 23:48:30,098 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-12-22 23:48:30,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 23:48:30,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:30,099 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:30,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 23:48:30,313 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:30,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:30,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1255714277, now seen corresponding path program 4 times [2020-12-22 23:48:30,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:30,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9530164] [2020-12-22 23:48:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 23:48:30,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9530164] [2020-12-22 23:48:30,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538039597] [2020-12-22 23:48:30,385 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 23:48:30,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:30,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:30,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:48:30,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 23:48:30,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:30,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 23:48:30,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757409089] [2020-12-22 23:48:30,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 23:48:30,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:30,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 23:48:30,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:48:30,500 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 8 states. [2020-12-22 23:48:30,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:30,528 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-12-22 23:48:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:48:30,528 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-12-22 23:48:30,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:30,529 INFO L225 Difference]: With dead ends: 74 [2020-12-22 23:48:30,529 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 23:48:30,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 23:48:30,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 23:48:30,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-22 23:48:30,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 23:48:30,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-12-22 23:48:30,535 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 29 [2020-12-22 23:48:30,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:30,536 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-12-22 23:48:30,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 23:48:30,536 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-12-22 23:48:30,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 23:48:30,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:30,537 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:30,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:30,753 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:30,754 INFO L82 PathProgramCache]: Analyzing trace with hash -654389213, now seen corresponding path program 5 times [2020-12-22 23:48:30,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:30,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44301995] [2020-12-22 23:48:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 23:48:30,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44301995] [2020-12-22 23:48:30,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216065255] [2020-12-22 23:48:30,847 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 23:48:30,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 23:48:30,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:30,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:48:30,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 23:48:31,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:31,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-22 23:48:31,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300889114] [2020-12-22 23:48:31,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:48:31,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:31,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:48:31,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:48:31,029 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 12 states. [2020-12-22 23:48:31,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:31,115 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-12-22 23:48:31,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 23:48:31,116 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-12-22 23:48:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:31,117 INFO L225 Difference]: With dead ends: 86 [2020-12-22 23:48:31,117 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 23:48:31,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 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 23:48:31,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 23:48:31,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-12-22 23:48:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 23:48:31,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-12-22 23:48:31,124 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 31 [2020-12-22 23:48:31,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:31,124 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-12-22 23:48:31,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:48:31,125 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-12-22 23:48:31,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 23:48:31,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:31,126 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:31,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:31,332 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:31,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:31,334 INFO L82 PathProgramCache]: Analyzing trace with hash -568371359, now seen corresponding path program 6 times [2020-12-22 23:48:31,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:31,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970447081] [2020-12-22 23:48:31,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-22 23:48:31,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970447081] [2020-12-22 23:48:31,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236506191] [2020-12-22 23:48:31,471 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 23:48:31,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 23:48:31,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:31,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:48:31,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:48:31,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:31,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-22 23:48:31,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693427219] [2020-12-22 23:48:31,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:48:31,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:31,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:48:31,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:31,661 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 14 states. [2020-12-22 23:48:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:31,728 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2020-12-22 23:48:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 23:48:31,729 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-12-22 23:48:31,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:31,730 INFO L225 Difference]: With dead ends: 100 [2020-12-22 23:48:31,730 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 23:48:31,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:31,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 23:48:31,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-12-22 23:48:31,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 23:48:31,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2020-12-22 23:48:31,738 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 36 [2020-12-22 23:48:31,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:31,739 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2020-12-22 23:48:31,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:48:31,739 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2020-12-22 23:48:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 23:48:31,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:31,740 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:31,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 23:48:31,955 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:31,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:31,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1072367713, now seen corresponding path program 7 times [2020-12-22 23:48:31,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:31,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103461040] [2020-12-22 23:48:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:48:32,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103461040] [2020-12-22 23:48:32,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489613530] [2020-12-22 23:48:32,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:48:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:32,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:48:32,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:48:32,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:32,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 23:48:32,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517359729] [2020-12-22 23:48:32,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 23:48:32,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:32,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 23:48:32,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:48:32,196 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 11 states. [2020-12-22 23:48:32,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:32,230 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2020-12-22 23:48:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:48:32,230 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-12-22 23:48:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:32,231 INFO L225 Difference]: With dead ends: 104 [2020-12-22 23:48:32,231 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 23:48:32,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 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 23:48:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 23:48:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-22 23:48:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 23:48:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-12-22 23:48:32,239 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 41 [2020-12-22 23:48:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:32,240 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-12-22 23:48:32,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 23:48:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-12-22 23:48:32,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 23:48:32,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:32,241 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:32,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:32,457 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:32,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:32,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1876143325, now seen corresponding path program 8 times [2020-12-22 23:48:32,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:32,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217317621] [2020-12-22 23:48:32,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:48:32,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217317621] [2020-12-22 23:48:32,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080695700] [2020-12-22 23:48:32,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:48:32,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:32,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:32,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:48:32,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:48:32,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:32,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 23:48:32,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809094284] [2020-12-22 23:48:32,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:48:32,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:32,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:48:32,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:48:32,779 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 12 states. [2020-12-22 23:48:32,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:32,822 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2020-12-22 23:48:32,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 23:48:32,823 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-12-22 23:48:32,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:32,826 INFO L225 Difference]: With dead ends: 106 [2020-12-22 23:48:32,826 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 23:48:32,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 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 23:48:32,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 23:48:32,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-22 23:48:32,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 23:48:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2020-12-22 23:48:32,840 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 43 [2020-12-22 23:48:32,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:32,841 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2020-12-22 23:48:32,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:48:32,841 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2020-12-22 23:48:32,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 23:48:32,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:32,842 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:33,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:33,052 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:33,053 INFO L82 PathProgramCache]: Analyzing trace with hash 716835483, now seen corresponding path program 9 times [2020-12-22 23:48:33,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:33,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277135138] [2020-12-22 23:48:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:48:33,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277135138] [2020-12-22 23:48:33,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201479803] [2020-12-22 23:48:33,231 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 23:48:33,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 23:48:33,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:33,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 23:48:33,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:33,517 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:33,522 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:33,525 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-22 23:48:33,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:33,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2020-12-22 23:48:33,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609821226] [2020-12-22 23:48:33,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 23:48:33,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:33,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 23:48:33,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:48:33,552 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 20 states. [2020-12-22 23:48:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:34,104 INFO L93 Difference]: Finished difference Result 127 states and 161 transitions. [2020-12-22 23:48:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 23:48:34,105 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-12-22 23:48:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:34,106 INFO L225 Difference]: With dead ends: 127 [2020-12-22 23:48:34,106 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 23:48:34,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=933, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 23:48:34,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 23:48:34,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2020-12-22 23:48:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 23:48:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2020-12-22 23:48:34,114 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 45 [2020-12-22 23:48:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:34,114 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2020-12-22 23:48:34,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 23:48:34,114 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2020-12-22 23:48:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 23:48:34,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:34,116 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:34,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 23:48:34,331 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:34,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:34,332 INFO L82 PathProgramCache]: Analyzing trace with hash 954995151, now seen corresponding path program 1 times [2020-12-22 23:48:34,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:34,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47895415] [2020-12-22 23:48:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-22 23:48:34,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47895415] [2020-12-22 23:48:34,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878462386] [2020-12-22 23:48:34,506 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 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 23:48:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:34,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:48:34,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-22 23:48:34,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:34,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 23:48:34,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086465686] [2020-12-22 23:48:34,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:48:34,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:34,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:48:34,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:34,671 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 14 states. [2020-12-22 23:48:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:34,721 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-12-22 23:48:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 23:48:34,722 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-12-22 23:48:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:34,723 INFO L225 Difference]: With dead ends: 116 [2020-12-22 23:48:34,723 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 23:48:34,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 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 23:48:34,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 23:48:34,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-22 23:48:34,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 23:48:34,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2020-12-22 23:48:34,730 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 51 [2020-12-22 23:48:34,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:34,730 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2020-12-22 23:48:34,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:48:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2020-12-22 23:48:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 23:48:34,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:34,732 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:34,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 23:48:34,947 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:34,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:34,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1796222579, now seen corresponding path program 2 times [2020-12-22 23:48:34,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:34,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805531937] [2020-12-22 23:48:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-22 23:48:35,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805531937] [2020-12-22 23:48:35,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260347853] [2020-12-22 23:48:35,136 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 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 23:48:35,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:35,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:35,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 23:48:35,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-22 23:48:35,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:35,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 23:48:35,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107770953] [2020-12-22 23:48:35,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 23:48:35,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:35,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 23:48:35,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:48:35,280 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 15 states. [2020-12-22 23:48:35,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:35,346 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2020-12-22 23:48:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 23:48:35,347 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-12-22 23:48:35,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:35,348 INFO L225 Difference]: With dead ends: 118 [2020-12-22 23:48:35,348 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 23:48:35,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:48:35,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 23:48:35,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-12-22 23:48:35,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 23:48:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2020-12-22 23:48:35,355 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 53 [2020-12-22 23:48:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:35,356 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2020-12-22 23:48:35,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 23:48:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2020-12-22 23:48:35,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 23:48:35,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:35,357 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:35,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 23:48:35,571 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:35,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:35,572 INFO L82 PathProgramCache]: Analyzing trace with hash -16606773, now seen corresponding path program 3 times [2020-12-22 23:48:35,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:35,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494754607] [2020-12-22 23:48:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-22 23:48:35,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494754607] [2020-12-22 23:48:35,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057423738] [2020-12-22 23:48:35,742 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 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 23:48:35,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 23:48:35,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:35,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:48:35,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-22 23:48:35,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:35,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2020-12-22 23:48:35,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401307424] [2020-12-22 23:48:35,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:48:35,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:35,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:48:35,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:48:35,951 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 21 states. [2020-12-22 23:48:36,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:36,069 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2020-12-22 23:48:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 23:48:36,069 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-12-22 23:48:36,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:36,070 INFO L225 Difference]: With dead ends: 130 [2020-12-22 23:48:36,070 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 23:48:36,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:48:36,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 23:48:36,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2020-12-22 23:48:36,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 23:48:36,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2020-12-22 23:48:36,077 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 55 [2020-12-22 23:48:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:36,077 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2020-12-22 23:48:36,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:48:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2020-12-22 23:48:36,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 23:48:36,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:36,078 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:36,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:36,288 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:36,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:36,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1404931173, now seen corresponding path program 4 times [2020-12-22 23:48:36,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:36,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401668277] [2020-12-22 23:48:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-22 23:48:36,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401668277] [2020-12-22 23:48:36,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301841932] [2020-12-22 23:48:36,467 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 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 23:48:36,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:36,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:36,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:48:36,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-22 23:48:36,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:36,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 23:48:36,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815944327] [2020-12-22 23:48:36,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 23:48:36,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:36,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 23:48:36,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:48:36,605 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 17 states. [2020-12-22 23:48:36,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:36,675 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2020-12-22 23:48:36,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 23:48:36,676 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 60 [2020-12-22 23:48:36,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:36,677 INFO L225 Difference]: With dead ends: 134 [2020-12-22 23:48:36,677 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 23:48:36,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 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 23:48:36,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 23:48:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-12-22 23:48:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 23:48:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2020-12-22 23:48:36,683 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 60 [2020-12-22 23:48:36,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:36,683 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2020-12-22 23:48:36,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 23:48:36,683 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2020-12-22 23:48:36,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 23:48:36,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:36,684 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:36,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 23:48:36,898 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:36,899 INFO L82 PathProgramCache]: Analyzing trace with hash -452812185, now seen corresponding path program 5 times [2020-12-22 23:48:36,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:36,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261955584] [2020-12-22 23:48:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-22 23:48:37,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261955584] [2020-12-22 23:48:37,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632562474] [2020-12-22 23:48:37,094 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 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 23:48:37,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-12-22 23:48:37,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:37,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 23:48:37,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-12-22 23:48:37,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:37,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2020-12-22 23:48:37,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571267745] [2020-12-22 23:48:37,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 23:48:37,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:37,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 23:48:37,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:48:37,429 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand 24 states. [2020-12-22 23:48:37,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:37,529 INFO L93 Difference]: Finished difference Result 146 states and 184 transitions. [2020-12-22 23:48:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 23:48:37,530 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-12-22 23:48:37,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:37,531 INFO L225 Difference]: With dead ends: 146 [2020-12-22 23:48:37,531 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 23:48:37,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:48:37,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 23:48:37,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2020-12-22 23:48:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 23:48:37,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2020-12-22 23:48:37,538 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 62 [2020-12-22 23:48:37,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:37,538 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2020-12-22 23:48:37,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 23:48:37,539 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2020-12-22 23:48:37,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 23:48:37,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:37,539 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:37,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 23:48:37,754 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:37,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:37,755 INFO L82 PathProgramCache]: Analyzing trace with hash -313320699, now seen corresponding path program 6 times [2020-12-22 23:48:37,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:37,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921941633] [2020-12-22 23:48:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-22 23:48:37,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921941633] [2020-12-22 23:48:37,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352509558] [2020-12-22 23:48:37,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:48:38,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 23:48:38,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:38,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 23:48:38,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:38,400 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:38,403 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:38,550 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:38,552 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:38,555 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:48:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 1 proven. 88 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-12-22 23:48:38,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:38,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 29 [2020-12-22 23:48:38,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379874406] [2020-12-22 23:48:38,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 23:48:38,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:38,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 23:48:38,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:48:38,593 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand 29 states. [2020-12-22 23:48:39,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:39,396 INFO L93 Difference]: Finished difference Result 191 states and 240 transitions. [2020-12-22 23:48:39,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 23:48:39,396 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2020-12-22 23:48:39,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:39,398 INFO L225 Difference]: With dead ends: 191 [2020-12-22 23:48:39,398 INFO L226 Difference]: Without dead ends: 134 [2020-12-22 23:48:39,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 23:48:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-22 23:48:39,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-12-22 23:48:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 23:48:39,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2020-12-22 23:48:39,407 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 67 [2020-12-22 23:48:39,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:39,408 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2020-12-22 23:48:39,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 23:48:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2020-12-22 23:48:39,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 23:48:39,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:39,409 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:39,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 23:48:39,623 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:39,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:39,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1186642617, now seen corresponding path program 7 times [2020-12-22 23:48:39,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:39,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404238779] [2020-12-22 23:48:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-12-22 23:48:39,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404238779] [2020-12-22 23:48:39,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835870854] [2020-12-22 23:48:39,847 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 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 23:48:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:39,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 23:48:39,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-12-22 23:48:40,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:40,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 23:48:40,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581004016] [2020-12-22 23:48:40,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 23:48:40,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:40,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 23:48:40,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:48:40,004 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand 20 states. [2020-12-22 23:48:40,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:40,058 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2020-12-22 23:48:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 23:48:40,059 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 73 [2020-12-22 23:48:40,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:40,060 INFO L225 Difference]: With dead ends: 160 [2020-12-22 23:48:40,060 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 23:48:40,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:48:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 23:48:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-12-22 23:48:40,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 23:48:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2020-12-22 23:48:40,066 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 73 [2020-12-22 23:48:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:40,066 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2020-12-22 23:48:40,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 23:48:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2020-12-22 23:48:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 23:48:40,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:40,067 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:40,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:40,278 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:40,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:40,279 INFO L82 PathProgramCache]: Analyzing trace with hash -2136672265, now seen corresponding path program 8 times [2020-12-22 23:48:40,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:40,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425207556] [2020-12-22 23:48:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-12-22 23:48:40,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425207556] [2020-12-22 23:48:40,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587854396] [2020-12-22 23:48:40,528 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 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 23:48:40,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:40,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:40,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 23:48:40,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-12-22 23:48:40,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:40,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 23:48:40,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404420781] [2020-12-22 23:48:40,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:48:40,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:40,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:48:40,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:48:40,699 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand 21 states. [2020-12-22 23:48:40,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:40,768 INFO L93 Difference]: Finished difference Result 162 states and 198 transitions. [2020-12-22 23:48:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 23:48:40,768 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 75 [2020-12-22 23:48:40,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:40,769 INFO L225 Difference]: With dead ends: 162 [2020-12-22 23:48:40,769 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 23:48:40,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 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 23:48:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 23:48:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-12-22 23:48:40,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-22 23:48:40,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2020-12-22 23:48:40,778 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 75 [2020-12-22 23:48:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:40,778 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2020-12-22 23:48:40,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:48:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2020-12-22 23:48:40,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 23:48:40,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:40,779 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:40,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:40,993 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:40,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:40,994 INFO L82 PathProgramCache]: Analyzing trace with hash -386605643, now seen corresponding path program 9 times [2020-12-22 23:48:40,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:40,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194870376] [2020-12-22 23:48:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-12-22 23:48:41,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194870376] [2020-12-22 23:48:41,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424546246] [2020-12-22 23:48:41,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:48:41,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 23:48:41,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:41,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:48:41,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-22 23:48:41,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:41,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 29 [2020-12-22 23:48:41,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128923483] [2020-12-22 23:48:41,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 23:48:41,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:41,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 23:48:41,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:48:41,615 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand 29 states. [2020-12-22 23:48:41,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:41,764 INFO L93 Difference]: Finished difference Result 174 states and 216 transitions. [2020-12-22 23:48:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 23:48:41,765 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 77 [2020-12-22 23:48:41,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:41,766 INFO L225 Difference]: With dead ends: 174 [2020-12-22 23:48:41,766 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 23:48:41,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:48:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 23:48:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2020-12-22 23:48:41,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-22 23:48:41,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2020-12-22 23:48:41,773 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 77 [2020-12-22 23:48:41,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:41,773 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2020-12-22 23:48:41,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 23:48:41,773 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2020-12-22 23:48:41,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 23:48:41,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:41,774 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 8, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:41,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 23:48:41,989 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:41,990 INFO L82 PathProgramCache]: Analyzing trace with hash -26441113, now seen corresponding path program 10 times [2020-12-22 23:48:41,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:41,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124205109] [2020-12-22 23:48:41,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2020-12-22 23:48:42,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124205109] [2020-12-22 23:48:42,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381118256] [2020-12-22 23:48:42,277 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 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 23:48:42,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:42,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:42,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:48:42,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2020-12-22 23:48:42,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:42,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11] total 31 [2020-12-22 23:48:42,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583355127] [2020-12-22 23:48:42,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 23:48:42,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:42,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 23:48:42,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-12-22 23:48:42,623 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand 31 states. [2020-12-22 23:48:42,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:42,791 INFO L93 Difference]: Finished difference Result 188 states and 234 transitions. [2020-12-22 23:48:42,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 23:48:42,792 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 82 [2020-12-22 23:48:42,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:42,793 INFO L225 Difference]: With dead ends: 188 [2020-12-22 23:48:42,793 INFO L226 Difference]: Without dead ends: 121 [2020-12-22 23:48:42,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-12-22 23:48:42,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-22 23:48:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2020-12-22 23:48:42,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-22 23:48:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2020-12-22 23:48:42,805 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 82 [2020-12-22 23:48:42,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:42,806 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2020-12-22 23:48:42,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 23:48:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2020-12-22 23:48:42,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 23:48:42,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:42,808 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:43,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 23:48:43,022 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:43,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:43,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1547212721, now seen corresponding path program 11 times [2020-12-22 23:48:43,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:43,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712683342] [2020-12-22 23:48:43,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-22 23:48:43,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712683342] [2020-12-22 23:48:43,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053638239] [2020-12-22 23:48:43,349 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 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 23:48:43,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-12-22 23:48:43,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:43,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:48:43,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2020-12-22 23:48:44,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:44,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2020-12-22 23:48:44,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142376741] [2020-12-22 23:48:44,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 23:48:44,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:44,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 23:48:44,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:48:44,229 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand 33 states. [2020-12-22 23:48:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:44,399 INFO L93 Difference]: Finished difference Result 202 states and 252 transitions. [2020-12-22 23:48:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 23:48:44,400 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 87 [2020-12-22 23:48:44,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:44,401 INFO L225 Difference]: With dead ends: 202 [2020-12-22 23:48:44,401 INFO L226 Difference]: Without dead ends: 129 [2020-12-22 23:48:44,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:48:44,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-22 23:48:44,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2020-12-22 23:48:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-22 23:48:44,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2020-12-22 23:48:44,408 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 87 [2020-12-22 23:48:44,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:44,408 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2020-12-22 23:48:44,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 23:48:44,409 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2020-12-22 23:48:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 23:48:44,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:44,410 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:44,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:44,624 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:44,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:44,625 INFO L82 PathProgramCache]: Analyzing trace with hash -279911317, now seen corresponding path program 12 times [2020-12-22 23:48:44,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:44,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854095336] [2020-12-22 23:48:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-12-22 23:48:44,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854095336] [2020-12-22 23:48:44,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273969496] [2020-12-22 23:48:44,955 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 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 23:48:46,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 23:48:46,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:46,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 23:48:46,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:46,226 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-22 23:48:46,227 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 23:48:46,230 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 23:48:46,231 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 23:48:46,231 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:1 [2020-12-22 23:48:46,520 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:46,523 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:46,730 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:46,732 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:46,734 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:48:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 1 proven. 193 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2020-12-22 23:48:46,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:46,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 39 [2020-12-22 23:48:46,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091083204] [2020-12-22 23:48:46,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 23:48:46,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:46,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 23:48:46,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 23:48:46,794 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand 39 states. [2020-12-22 23:48:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:48,007 INFO L93 Difference]: Finished difference Result 262 states and 328 transitions. [2020-12-22 23:48:48,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 23:48:48,007 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 92 [2020-12-22 23:48:48,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:48,009 INFO L225 Difference]: With dead ends: 262 [2020-12-22 23:48:48,009 INFO L226 Difference]: Without dead ends: 183 [2020-12-22 23:48:48,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=432, Invalid=2018, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 23:48:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-22 23:48:48,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 130. [2020-12-22 23:48:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-22 23:48:48,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2020-12-22 23:48:48,017 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 92 [2020-12-22 23:48:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:48,018 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2020-12-22 23:48:48,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 23:48:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2020-12-22 23:48:48,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 23:48:48,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:48,019 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:48,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 23:48:48,235 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:48,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:48,235 INFO L82 PathProgramCache]: Analyzing trace with hash 156674403, now seen corresponding path program 13 times [2020-12-22 23:48:48,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:48,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089894162] [2020-12-22 23:48:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-12-22 23:48:48,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089894162] [2020-12-22 23:48:48,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207539655] [2020-12-22 23:48:48,599 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 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 23:48:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:48,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 23:48:48,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-12-22 23:48:48,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:48,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 23:48:48,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776508758] [2020-12-22 23:48:48,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 23:48:48,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:48,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 23:48:48,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:48:48,815 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand 26 states. [2020-12-22 23:48:48,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:48,898 INFO L93 Difference]: Finished difference Result 216 states and 264 transitions. [2020-12-22 23:48:48,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 23:48:48,898 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2020-12-22 23:48:48,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:48,899 INFO L225 Difference]: With dead ends: 216 [2020-12-22 23:48:48,899 INFO L226 Difference]: Without dead ends: 133 [2020-12-22 23:48:48,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:48:48,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-22 23:48:48,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2020-12-22 23:48:48,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 23:48:48,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2020-12-22 23:48:48,907 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 98 [2020-12-22 23:48:48,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:48,907 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2020-12-22 23:48:48,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 23:48:48,908 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2020-12-22 23:48:48,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 23:48:48,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:48,909 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 10, 10, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:49,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:49,125 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:49,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:49,125 INFO L82 PathProgramCache]: Analyzing trace with hash 639446501, now seen corresponding path program 14 times [2020-12-22 23:48:49,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:49,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176920373] [2020-12-22 23:48:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-12-22 23:48:49,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176920373] [2020-12-22 23:48:49,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459409216] [2020-12-22 23:48:49,587 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:49,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:49,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:49,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 23:48:49,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-12-22 23:48:49,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:49,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 23:48:49,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048422467] [2020-12-22 23:48:49,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 23:48:49,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:49,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 23:48:49,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 23:48:49,786 INFO L87 Difference]: Start difference. First operand 132 states and 156 transitions. Second operand 27 states. [2020-12-22 23:48:49,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:49,873 INFO L93 Difference]: Finished difference Result 218 states and 266 transitions. [2020-12-22 23:48:49,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 23:48:49,874 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 100 [2020-12-22 23:48:49,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:49,875 INFO L225 Difference]: With dead ends: 218 [2020-12-22 23:48:49,875 INFO L226 Difference]: Without dead ends: 135 [2020-12-22 23:48:49,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 23:48:49,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-22 23:48:49,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2020-12-22 23:48:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 23:48:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2020-12-22 23:48:49,882 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 100 [2020-12-22 23:48:49,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:49,883 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2020-12-22 23:48:49,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 23:48:49,883 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2020-12-22 23:48:49,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 23:48:49,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:49,884 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 10, 10, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:50,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 23:48:50,098 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:50,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:50,099 INFO L82 PathProgramCache]: Analyzing trace with hash 726964711, now seen corresponding path program 15 times [2020-12-22 23:48:50,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:50,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792875879] [2020-12-22 23:48:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-12-22 23:48:50,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792875879] [2020-12-22 23:48:50,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483485524] [2020-12-22 23:48:50,542 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:50,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 23:48:50,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:50,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:48:50,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2020-12-22 23:48:51,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:51,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13] total 38 [2020-12-22 23:48:51,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38267140] [2020-12-22 23:48:51,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 23:48:51,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:51,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 23:48:51,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=978, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:48:51,080 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand 38 states. [2020-12-22 23:48:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:51,320 INFO L93 Difference]: Finished difference Result 230 states and 284 transitions. [2020-12-22 23:48:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 23:48:51,325 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 102 [2020-12-22 23:48:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:51,326 INFO L225 Difference]: With dead ends: 230 [2020-12-22 23:48:51,326 INFO L226 Difference]: Without dead ends: 147 [2020-12-22 23:48:51,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=428, Invalid=978, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:48:51,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-22 23:48:51,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2020-12-22 23:48:51,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-22 23:48:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2020-12-22 23:48:51,334 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 102 [2020-12-22 23:48:51,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:51,335 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2020-12-22 23:48:51,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 23:48:51,335 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2020-12-22 23:48:51,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-22 23:48:51,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:51,336 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 11, 11, 11, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:51,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 23:48:51,552 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:51,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:51,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1477409059, now seen corresponding path program 16 times [2020-12-22 23:48:51,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:51,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653444283] [2020-12-22 23:48:51,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-22 23:48:52,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653444283] [2020-12-22 23:48:52,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148047277] [2020-12-22 23:48:52,011 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:52,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:52,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:52,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 23:48:52,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-22 23:48:52,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:52,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 23:48:52,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345805773] [2020-12-22 23:48:52,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 23:48:52,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:52,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 23:48:52,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:48:52,230 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand 29 states. [2020-12-22 23:48:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:52,346 INFO L93 Difference]: Finished difference Result 234 states and 286 transitions. [2020-12-22 23:48:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 23:48:52,347 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 107 [2020-12-22 23:48:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:52,348 INFO L225 Difference]: With dead ends: 234 [2020-12-22 23:48:52,348 INFO L226 Difference]: Without dead ends: 145 [2020-12-22 23:48:52,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:48:52,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-22 23:48:52,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-12-22 23:48:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 23:48:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 170 transitions. [2020-12-22 23:48:52,356 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 170 transitions. Word has length 107 [2020-12-22 23:48:52,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:52,356 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 170 transitions. [2020-12-22 23:48:52,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 23:48:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 170 transitions. [2020-12-22 23:48:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 23:48:52,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:52,357 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 11, 11, 11, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:52,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 23:48:52,570 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:52,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:52,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1971975323, now seen corresponding path program 17 times [2020-12-22 23:48:52,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:52,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556079561] [2020-12-22 23:48:52,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-22 23:48:53,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556079561] [2020-12-22 23:48:53,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244172329] [2020-12-22 23:48:53,067 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:54,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2020-12-22 23:48:54,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:54,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 23:48:54,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2020-12-22 23:48:54,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:54,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14] total 41 [2020-12-22 23:48:54,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527623808] [2020-12-22 23:48:54,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 23:48:54,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:54,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 23:48:54,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=1144, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 23:48:54,803 INFO L87 Difference]: Start difference. First operand 144 states and 170 transitions. Second operand 41 states. [2020-12-22 23:48:55,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:55,026 INFO L93 Difference]: Finished difference Result 246 states and 304 transitions. [2020-12-22 23:48:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 23:48:55,026 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 109 [2020-12-22 23:48:55,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:55,028 INFO L225 Difference]: With dead ends: 246 [2020-12-22 23:48:55,028 INFO L226 Difference]: Without dead ends: 157 [2020-12-22 23:48:55,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=1144, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 23:48:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-22 23:48:55,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 152. [2020-12-22 23:48:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-22 23:48:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 180 transitions. [2020-12-22 23:48:55,037 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 180 transitions. Word has length 109 [2020-12-22 23:48:55,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:55,037 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 180 transitions. [2020-12-22 23:48:55,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 23:48:55,037 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 180 transitions. [2020-12-22 23:48:55,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 23:48:55,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:55,038 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:55,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 23:48:55,252 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:55,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:55,253 INFO L82 PathProgramCache]: Analyzing trace with hash 2036101997, now seen corresponding path program 18 times [2020-12-22 23:48:55,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:55,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595699792] [2020-12-22 23:48:55,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2020-12-22 23:48:55,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595699792] [2020-12-22 23:48:55,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361991988] [2020-12-22 23:48:55,792 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:56,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 23:48:56,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:56,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 23:48:56,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:57,367 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:57,373 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:57,613 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:57,615 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:57,617 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:48:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 1 proven. 328 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2020-12-22 23:48:57,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:57,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 21] total 48 [2020-12-22 23:48:57,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723120023] [2020-12-22 23:48:57,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 23:48:57,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:57,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 23:48:57,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=1689, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 23:48:57,682 INFO L87 Difference]: Start difference. First operand 152 states and 180 transitions. Second operand 48 states. [2020-12-22 23:48:59,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:59,557 INFO L93 Difference]: Finished difference Result 315 states and 392 transitions. [2020-12-22 23:48:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 23:48:59,557 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 114 [2020-12-22 23:48:59,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:59,558 INFO L225 Difference]: With dead ends: 315 [2020-12-22 23:48:59,559 INFO L226 Difference]: Without dead ends: 220 [2020-12-22 23:48:59,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=639, Invalid=2901, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 23:48:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-22 23:48:59,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 158. [2020-12-22 23:48:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-22 23:48:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2020-12-22 23:48:59,569 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 114 [2020-12-22 23:48:59,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:59,569 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2020-12-22 23:48:59,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 23:48:59,570 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2020-12-22 23:48:59,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 23:48:59,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:59,570 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 12, 12, 12, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:59,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:59,785 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:59,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:59,786 INFO L82 PathProgramCache]: Analyzing trace with hash 283531749, now seen corresponding path program 19 times [2020-12-22 23:48:59,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:59,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586394171] [2020-12-22 23:48:59,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-22 23:49:00,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586394171] [2020-12-22 23:49:00,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473915239] [2020-12-22 23:49:00,366 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:00,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 23:49:00,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-22 23:49:00,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:00,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 23:49:00,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417904284] [2020-12-22 23:49:00,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 23:49:00,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:00,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 23:49:00,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:49:00,607 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand 32 states. [2020-12-22 23:49:00,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:00,718 INFO L93 Difference]: Finished difference Result 260 states and 316 transitions. [2020-12-22 23:49:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 23:49:00,719 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 120 [2020-12-22 23:49:00,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:00,720 INFO L225 Difference]: With dead ends: 260 [2020-12-22 23:49:00,720 INFO L226 Difference]: Without dead ends: 161 [2020-12-22 23:49:00,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:49:00,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-22 23:49:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-12-22 23:49:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-22 23:49:00,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 188 transitions. [2020-12-22 23:49:00,729 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 188 transitions. Word has length 120 [2020-12-22 23:49:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:00,730 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 188 transitions. [2020-12-22 23:49:00,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 23:49:00,730 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 188 transitions. [2020-12-22 23:49:00,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 23:49:00,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:00,731 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 12, 12, 12, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:00,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:00,945 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:00,946 INFO L82 PathProgramCache]: Analyzing trace with hash -178147097, now seen corresponding path program 20 times [2020-12-22 23:49:00,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:00,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770746585] [2020-12-22 23:49:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-22 23:49:01,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770746585] [2020-12-22 23:49:01,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790108078] [2020-12-22 23:49:01,512 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:01,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:49:01,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:01,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 23:49:01,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-22 23:49:01,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:01,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 23:49:01,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138247841] [2020-12-22 23:49:01,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 23:49:01,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:01,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 23:49:01,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:49:01,745 INFO L87 Difference]: Start difference. First operand 160 states and 188 transitions. Second operand 33 states. [2020-12-22 23:49:01,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:01,855 INFO L93 Difference]: Finished difference Result 262 states and 318 transitions. [2020-12-22 23:49:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 23:49:01,856 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 122 [2020-12-22 23:49:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:01,857 INFO L225 Difference]: With dead ends: 262 [2020-12-22 23:49:01,857 INFO L226 Difference]: Without dead ends: 163 [2020-12-22 23:49:01,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:49:01,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-22 23:49:01,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-12-22 23:49:01,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-22 23:49:01,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 190 transitions. [2020-12-22 23:49:01,866 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 190 transitions. Word has length 122 [2020-12-22 23:49:01,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:01,866 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 190 transitions. [2020-12-22 23:49:01,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 23:49:01,866 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 190 transitions. [2020-12-22 23:49:01,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 23:49:01,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:01,867 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 12, 12, 12, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:02,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:02,081 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:02,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:02,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1469886615, now seen corresponding path program 21 times [2020-12-22 23:49:02,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:02,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909752094] [2020-12-22 23:49:02,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-22 23:49:02,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909752094] [2020-12-22 23:49:02,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031231437] [2020-12-22 23:49:02,772 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:03,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-22 23:49:03,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:03,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:49:03,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 932 trivial. 0 not checked. [2020-12-22 23:49:03,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:03,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 15] total 46 [2020-12-22 23:49:03,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272791317] [2020-12-22 23:49:03,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 23:49:03,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:03,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 23:49:03,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=1438, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 23:49:03,516 INFO L87 Difference]: Start difference. First operand 162 states and 190 transitions. Second operand 46 states. [2020-12-22 23:49:03,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:03,715 INFO L93 Difference]: Finished difference Result 274 states and 336 transitions. [2020-12-22 23:49:03,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 23:49:03,715 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 124 [2020-12-22 23:49:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:03,716 INFO L225 Difference]: With dead ends: 274 [2020-12-22 23:49:03,716 INFO L226 Difference]: Without dead ends: 175 [2020-12-22 23:49:03,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=1438, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 23:49:03,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-22 23:49:03,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2020-12-22 23:49:03,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-22 23:49:03,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 200 transitions. [2020-12-22 23:49:03,726 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 200 transitions. Word has length 124 [2020-12-22 23:49:03,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:03,726 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 200 transitions. [2020-12-22 23:49:03,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 23:49:03,727 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 200 transitions. [2020-12-22 23:49:03,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 23:49:03,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:03,728 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 13, 13, 13, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:03,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 23:49:03,941 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:03,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:03,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1176120135, now seen corresponding path program 22 times [2020-12-22 23:49:03,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:03,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654079513] [2020-12-22 23:49:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-12-22 23:49:04,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654079513] [2020-12-22 23:49:04,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240424601] [2020-12-22 23:49:04,657 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:04,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:49:04,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:04,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 23:49:04,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-12-22 23:49:04,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:04,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 23:49:04,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821420003] [2020-12-22 23:49:04,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 23:49:04,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:04,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 23:49:04,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 23:49:04,907 INFO L87 Difference]: Start difference. First operand 170 states and 200 transitions. Second operand 35 states. [2020-12-22 23:49:05,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:05,024 INFO L93 Difference]: Finished difference Result 278 states and 338 transitions. [2020-12-22 23:49:05,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 23:49:05,025 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 129 [2020-12-22 23:49:05,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:05,026 INFO L225 Difference]: With dead ends: 278 [2020-12-22 23:49:05,026 INFO L226 Difference]: Without dead ends: 173 [2020-12-22 23:49:05,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 23:49:05,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-22 23:49:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2020-12-22 23:49:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-22 23:49:05,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 202 transitions. [2020-12-22 23:49:05,036 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 202 transitions. Word has length 129 [2020-12-22 23:49:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:05,036 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 202 transitions. [2020-12-22 23:49:05,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 23:49:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 202 transitions. [2020-12-22 23:49:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 23:49:05,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:05,037 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 13, 13, 13, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:05,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:05,252 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:05,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:05,253 INFO L82 PathProgramCache]: Analyzing trace with hash 436442757, now seen corresponding path program 23 times [2020-12-22 23:49:05,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:05,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334650384] [2020-12-22 23:49:05,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-12-22 23:49:06,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334650384] [2020-12-22 23:49:06,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813254805] [2020-12-22 23:49:06,008 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:16,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2020-12-22 23:49:16,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:16,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:49:16,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2020-12-22 23:49:16,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:16,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 16] total 49 [2020-12-22 23:49:16,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849015298] [2020-12-22 23:49:16,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 23:49:16,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:16,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 23:49:16,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=1638, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 23:49:16,911 INFO L87 Difference]: Start difference. First operand 172 states and 202 transitions. Second operand 49 states. [2020-12-22 23:49:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:17,216 INFO L93 Difference]: Finished difference Result 290 states and 356 transitions. [2020-12-22 23:49:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 23:49:17,216 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 131 [2020-12-22 23:49:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:17,218 INFO L225 Difference]: With dead ends: 290 [2020-12-22 23:49:17,218 INFO L226 Difference]: Without dead ends: 185 [2020-12-22 23:49:17,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=714, Invalid=1638, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 23:49:17,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-22 23:49:17,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 180. [2020-12-22 23:49:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-22 23:49:17,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 212 transitions. [2020-12-22 23:49:17,228 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 212 transitions. Word has length 131 [2020-12-22 23:49:17,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:17,228 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 212 transitions. [2020-12-22 23:49:17,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 23:49:17,228 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 212 transitions. [2020-12-22 23:49:17,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 23:49:17,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:17,229 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 14, 14, 14, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:17,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 23:49:17,443 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:17,444 INFO L82 PathProgramCache]: Analyzing trace with hash -978057361, now seen corresponding path program 24 times [2020-12-22 23:49:17,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:17,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961878566] [2020-12-22 23:49:17,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2020-12-22 23:49:18,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961878566] [2020-12-22 23:49:18,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979981714] [2020-12-22 23:49:18,179 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:23,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 23:49:23,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:23,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 23:49:23,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 1121 trivial. 0 not checked. [2020-12-22 23:49:23,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:23,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 17] total 51 [2020-12-22 23:49:23,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494361742] [2020-12-22 23:49:23,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 23:49:23,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:23,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 23:49:23,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=1785, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 23:49:23,802 INFO L87 Difference]: Start difference. First operand 180 states and 212 transitions. Second operand 51 states. [2020-12-22 23:49:24,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:24,063 INFO L93 Difference]: Finished difference Result 304 states and 374 transitions. [2020-12-22 23:49:24,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 23:49:24,063 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 136 [2020-12-22 23:49:24,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:24,065 INFO L225 Difference]: With dead ends: 304 [2020-12-22 23:49:24,065 INFO L226 Difference]: Without dead ends: 193 [2020-12-22 23:49:24,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=765, Invalid=1785, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 23:49:24,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-22 23:49:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 188. [2020-12-22 23:49:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-22 23:49:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 222 transitions. [2020-12-22 23:49:24,075 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 222 transitions. Word has length 136 [2020-12-22 23:49:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:24,075 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 222 transitions. [2020-12-22 23:49:24,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 23:49:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 222 transitions. [2020-12-22 23:49:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 23:49:24,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:24,076 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 15, 15, 15, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:24,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:24,290 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:24,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:24,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1542651775, now seen corresponding path program 25 times [2020-12-22 23:49:24,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:24,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747531724] [2020-12-22 23:49:24,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1519 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-22 23:49:25,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747531724] [2020-12-22 23:49:25,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668715808] [2020-12-22 23:49:25,137 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:25,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 23:49:25,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1519 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-22 23:49:25,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:25,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 23:49:25,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431549422] [2020-12-22 23:49:25,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 23:49:25,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:25,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 23:49:25,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:49:25,404 INFO L87 Difference]: Start difference. First operand 188 states and 222 transitions. Second operand 38 states. [2020-12-22 23:49:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:25,545 INFO L93 Difference]: Finished difference Result 308 states and 376 transitions. [2020-12-22 23:49:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 23:49:25,545 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 141 [2020-12-22 23:49:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:25,546 INFO L225 Difference]: With dead ends: 308 [2020-12-22 23:49:25,546 INFO L226 Difference]: Without dead ends: 191 [2020-12-22 23:49:25,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:49:25,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-22 23:49:25,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2020-12-22 23:49:25,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-22 23:49:25,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 224 transitions. [2020-12-22 23:49:25,556 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 224 transitions. Word has length 141 [2020-12-22 23:49:25,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:25,556 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 224 transitions. [2020-12-22 23:49:25,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 23:49:25,557 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 224 transitions. [2020-12-22 23:49:25,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 23:49:25,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:25,558 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 15, 15, 15, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:25,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 23:49:25,773 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:25,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1776910015, now seen corresponding path program 26 times [2020-12-22 23:49:25,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:25,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988642608] [2020-12-22 23:49:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-22 23:49:26,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988642608] [2020-12-22 23:49:26,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269716528] [2020-12-22 23:49:26,652 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:26,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:49:26,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:26,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 23:49:26,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-22 23:49:26,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:26,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 23:49:26,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391627978] [2020-12-22 23:49:26,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 23:49:26,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:26,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 23:49:26,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 23:49:26,922 INFO L87 Difference]: Start difference. First operand 190 states and 224 transitions. Second operand 39 states. [2020-12-22 23:49:27,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:27,048 INFO L93 Difference]: Finished difference Result 310 states and 378 transitions. [2020-12-22 23:49:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 23:49:27,049 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 143 [2020-12-22 23:49:27,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:27,050 INFO L225 Difference]: With dead ends: 310 [2020-12-22 23:49:27,050 INFO L226 Difference]: Without dead ends: 193 [2020-12-22 23:49:27,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 23:49:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-22 23:49:27,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2020-12-22 23:49:27,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-22 23:49:27,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 226 transitions. [2020-12-22 23:49:27,060 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 226 transitions. Word has length 143 [2020-12-22 23:49:27,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:27,060 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 226 transitions. [2020-12-22 23:49:27,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 23:49:27,060 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 226 transitions. [2020-12-22 23:49:27,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 23:49:27,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:27,062 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 15, 15, 15, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:27,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 23:49:27,275 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:27,276 INFO L82 PathProgramCache]: Analyzing trace with hash 715089277, now seen corresponding path program 27 times [2020-12-22 23:49:27,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:27,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226824712] [2020-12-22 23:49:27,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1659 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-22 23:49:28,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226824712] [2020-12-22 23:49:28,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641068512] [2020-12-22 23:49:28,203 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:28,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 23:49:28,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:28,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 23:49:28,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:29,346 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:29,348 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:29,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:29,622 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:29,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:49:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1659 backedges. 1 proven. 542 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2020-12-22 23:49:29,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:29,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 24] total 60 [2020-12-22 23:49:29,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608401537] [2020-12-22 23:49:29,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 23:49:29,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:29,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 23:49:29,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=941, Invalid=2599, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 23:49:29,714 INFO L87 Difference]: Start difference. First operand 192 states and 226 transitions. Second operand 60 states. [2020-12-22 23:49:31,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:31,943 INFO L93 Difference]: Finished difference Result 389 states and 482 transitions. [2020-12-22 23:49:31,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 23:49:31,943 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 145 [2020-12-22 23:49:31,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:31,945 INFO L225 Difference]: With dead ends: 389 [2020-12-22 23:49:31,945 INFO L226 Difference]: Without dead ends: 272 [2020-12-22 23:49:31,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1017, Invalid=4239, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 23:49:31,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-22 23:49:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 198. [2020-12-22 23:49:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 23:49:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 232 transitions. [2020-12-22 23:49:31,957 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 232 transitions. Word has length 145 [2020-12-22 23:49:31,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:31,957 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 232 transitions. [2020-12-22 23:49:31,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 23:49:31,957 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 232 transitions. [2020-12-22 23:49:31,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 23:49:31,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:31,958 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 15, 15, 15, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:32,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 23:49:32,172 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:32,173 INFO L82 PathProgramCache]: Analyzing trace with hash 592049329, now seen corresponding path program 28 times [2020-12-22 23:49:32,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:32,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641174889] [2020-12-22 23:49:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2020-12-22 23:49:33,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641174889] [2020-12-22 23:49:33,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984249205] [2020-12-22 23:49:33,185 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:33,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:49:33,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:33,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 23:49:33,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2020-12-22 23:49:33,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:33,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 23:49:33,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124996574] [2020-12-22 23:49:33,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 23:49:33,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:33,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 23:49:33,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 23:49:33,475 INFO L87 Difference]: Start difference. First operand 198 states and 232 transitions. Second operand 41 states. [2020-12-22 23:49:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:33,627 INFO L93 Difference]: Finished difference Result 322 states and 390 transitions. [2020-12-22 23:49:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 23:49:33,631 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 151 [2020-12-22 23:49:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:33,633 INFO L225 Difference]: With dead ends: 322 [2020-12-22 23:49:33,633 INFO L226 Difference]: Without dead ends: 201 [2020-12-22 23:49:33,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 23:49:33,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-22 23:49:33,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-12-22 23:49:33,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-22 23:49:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 234 transitions. [2020-12-22 23:49:33,643 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 234 transitions. Word has length 151 [2020-12-22 23:49:33,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:33,643 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 234 transitions. [2020-12-22 23:49:33,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 23:49:33,643 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 234 transitions. [2020-12-22 23:49:33,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 23:49:33,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:33,644 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 15, 15, 15, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:33,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 23:49:33,859 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:33,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:33,860 INFO L82 PathProgramCache]: Analyzing trace with hash -444318353, now seen corresponding path program 29 times [2020-12-22 23:49:33,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:33,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892157822] [2020-12-22 23:49:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2020-12-22 23:49:34,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892157822] [2020-12-22 23:49:34,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629866944] [2020-12-22 23:49:34,941 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:47,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2020-12-22 23:49:47,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:47,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 23:49:47,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 1494 trivial. 0 not checked. [2020-12-22 23:49:47,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:47,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 18] total 57 [2020-12-22 23:49:47,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663517437] [2020-12-22 23:49:47,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 23:49:47,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:47,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 23:49:47,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=972, Invalid=2220, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 23:49:47,981 INFO L87 Difference]: Start difference. First operand 200 states and 234 transitions. Second operand 57 states. [2020-12-22 23:49:48,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:48,270 INFO L93 Difference]: Finished difference Result 334 states and 408 transitions. [2020-12-22 23:49:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 23:49:48,271 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 153 [2020-12-22 23:49:48,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:48,272 INFO L225 Difference]: With dead ends: 334 [2020-12-22 23:49:48,272 INFO L226 Difference]: Without dead ends: 213 [2020-12-22 23:49:48,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=972, Invalid=2220, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 23:49:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-22 23:49:48,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2020-12-22 23:49:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-12-22 23:49:48,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 244 transitions. [2020-12-22 23:49:48,283 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 244 transitions. Word has length 153 [2020-12-22 23:49:48,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:48,283 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 244 transitions. [2020-12-22 23:49:48,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 23:49:48,283 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 244 transitions. [2020-12-22 23:49:48,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 23:49:48,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:48,284 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 16, 16, 16, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:48,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:48,499 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:48,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:48,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2093752207, now seen corresponding path program 30 times [2020-12-22 23:49:48,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:48,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710319365] [2020-12-22 23:49:48,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1948 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-12-22 23:49:49,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710319365] [2020-12-22 23:49:49,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974258569] [2020-12-22 23:49:49,599 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:54,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2020-12-22 23:49:54,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:54,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 23:49:54,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1948 backedges. 78 proven. 376 refuted. 0 times theorem prover too weak. 1494 trivial. 0 not checked. [2020-12-22 23:49:55,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:55,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 21] total 61 [2020-12-22 23:49:55,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753594245] [2020-12-22 23:49:55,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 23:49:55,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:55,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 23:49:55,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1116, Invalid=2544, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 23:49:55,666 INFO L87 Difference]: Start difference. First operand 208 states and 244 transitions. Second operand 61 states. [2020-12-22 23:49:56,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:56,811 INFO L93 Difference]: Finished difference Result 349 states and 428 transitions. [2020-12-22 23:49:56,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-22 23:49:56,811 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 158 [2020-12-22 23:49:56,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:56,812 INFO L225 Difference]: With dead ends: 349 [2020-12-22 23:49:56,812 INFO L226 Difference]: Without dead ends: 222 [2020-12-22 23:49:56,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1456, Invalid=4550, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 23:49:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-22 23:49:56,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 218. [2020-12-22 23:49:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-12-22 23:49:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 256 transitions. [2020-12-22 23:49:56,824 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 256 transitions. Word has length 158 [2020-12-22 23:49:56,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:56,824 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 256 transitions. [2020-12-22 23:49:56,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 23:49:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 256 transitions. [2020-12-22 23:49:56,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-22 23:49:56,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:56,826 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 17, 17, 17, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:57,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-22 23:49:57,040 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:57,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1709385943, now seen corresponding path program 31 times [2020-12-22 23:49:57,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:57,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169479763] [2020-12-22 23:49:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2157 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-12-22 23:49:58,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169479763] [2020-12-22 23:49:58,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633081178] [2020-12-22 23:49:58,209 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:58,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 23:49:58,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2157 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-12-22 23:49:58,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:58,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 23:49:58,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413919210] [2020-12-22 23:49:58,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 23:49:58,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:58,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 23:49:58,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 23:49:58,548 INFO L87 Difference]: Start difference. First operand 218 states and 256 transitions. Second operand 45 states. [2020-12-22 23:49:58,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:58,717 INFO L93 Difference]: Finished difference Result 354 states and 430 transitions. [2020-12-22 23:49:58,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 23:49:58,718 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 165 [2020-12-22 23:49:58,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:58,719 INFO L225 Difference]: With dead ends: 354 [2020-12-22 23:49:58,719 INFO L226 Difference]: Without dead ends: 221 [2020-12-22 23:49:58,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 23:49:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-22 23:49:58,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2020-12-22 23:49:58,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-22 23:49:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 258 transitions. [2020-12-22 23:49:58,731 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 258 transitions. Word has length 165 [2020-12-22 23:49:58,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:58,733 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 258 transitions. [2020-12-22 23:49:58,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 23:49:58,733 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 258 transitions. [2020-12-22 23:49:58,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-22 23:49:58,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:58,734 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 17, 17, 17, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:58,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:58,948 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:58,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:58,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1435630439, now seen corresponding path program 32 times [2020-12-22 23:49:58,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:58,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85230718] [2020-12-22 23:49:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-12-22 23:50:00,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85230718] [2020-12-22 23:50:00,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638589924] [2020-12-22 23:50:00,212 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:00,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:50:00,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:00,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 23:50:00,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2240 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-12-22 23:50:00,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:00,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 23:50:00,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937740972] [2020-12-22 23:50:00,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 23:50:00,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:00,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 23:50:00,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 23:50:00,534 INFO L87 Difference]: Start difference. First operand 220 states and 258 transitions. Second operand 46 states. [2020-12-22 23:50:00,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:00,735 INFO L93 Difference]: Finished difference Result 356 states and 432 transitions. [2020-12-22 23:50:00,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 23:50:00,736 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 167 [2020-12-22 23:50:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:00,737 INFO L225 Difference]: With dead ends: 356 [2020-12-22 23:50:00,737 INFO L226 Difference]: Without dead ends: 223 [2020-12-22 23:50:00,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 23:50:00,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-22 23:50:00,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2020-12-22 23:50:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-22 23:50:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 260 transitions. [2020-12-22 23:50:00,748 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 260 transitions. Word has length 167 [2020-12-22 23:50:00,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:00,748 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 260 transitions. [2020-12-22 23:50:00,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 23:50:00,748 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 260 transitions. [2020-12-22 23:50:00,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 23:50:00,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:00,750 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 17, 17, 17, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:00,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:00,964 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:00,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:00,965 INFO L82 PathProgramCache]: Analyzing trace with hash 139397157, now seen corresponding path program 33 times [2020-12-22 23:50:00,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:00,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506542688] [2020-12-22 23:50:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-12-22 23:50:02,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506542688] [2020-12-22 23:50:02,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378311283] [2020-12-22 23:50:02,286 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:02,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2020-12-22 23:50:02,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:02,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 23:50:02,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 86 proven. 425 refuted. 0 times theorem prover too weak. 1814 trivial. 0 not checked. [2020-12-22 23:50:03,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:03,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 22] total 66 [2020-12-22 23:50:03,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795153780] [2020-12-22 23:50:03,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-22 23:50:03,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:03,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-22 23:50:03,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1317, Invalid=2973, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 23:50:03,905 INFO L87 Difference]: Start difference. First operand 222 states and 260 transitions. Second operand 66 states. [2020-12-22 23:50:05,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:05,277 INFO L93 Difference]: Finished difference Result 369 states and 452 transitions. [2020-12-22 23:50:05,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 23:50:05,278 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 169 [2020-12-22 23:50:05,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:05,279 INFO L225 Difference]: With dead ends: 369 [2020-12-22 23:50:05,280 INFO L226 Difference]: Without dead ends: 236 [2020-12-22 23:50:05,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1695, Invalid=5277, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 23:50:05,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-12-22 23:50:05,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2020-12-22 23:50:05,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-22 23:50:05,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 272 transitions. [2020-12-22 23:50:05,291 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 272 transitions. Word has length 169 [2020-12-22 23:50:05,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:05,292 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 272 transitions. [2020-12-22 23:50:05,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-22 23:50:05,292 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 272 transitions. [2020-12-22 23:50:05,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 23:50:05,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:05,293 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 18, 18, 18, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:05,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 23:50:05,506 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:05,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:05,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1396437123, now seen corresponding path program 34 times [2020-12-22 23:50:05,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:05,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433226439] [2020-12-22 23:50:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-12-22 23:50:06,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433226439] [2020-12-22 23:50:06,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074975061] [2020-12-22 23:50:06,870 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:07,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:50:07,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:07,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 23:50:07,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-12-22 23:50:07,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:07,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 23:50:07,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204482180] [2020-12-22 23:50:07,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 23:50:07,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:07,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 23:50:07,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 23:50:07,220 INFO L87 Difference]: Start difference. First operand 232 states and 272 transitions. Second operand 49 states. [2020-12-22 23:50:07,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:07,395 INFO L93 Difference]: Finished difference Result 374 states and 454 transitions. [2020-12-22 23:50:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 23:50:07,396 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 176 [2020-12-22 23:50:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:07,398 INFO L225 Difference]: With dead ends: 374 [2020-12-22 23:50:07,398 INFO L226 Difference]: Without dead ends: 235 [2020-12-22 23:50:07,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 23:50:07,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-12-22 23:50:07,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2020-12-22 23:50:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-12-22 23:50:07,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 274 transitions. [2020-12-22 23:50:07,408 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 274 transitions. Word has length 176 [2020-12-22 23:50:07,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:07,409 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 274 transitions. [2020-12-22 23:50:07,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 23:50:07,409 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 274 transitions. [2020-12-22 23:50:07,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-22 23:50:07,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:07,410 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 18, 18, 18, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:07,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 23:50:07,622 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:07,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:07,623 INFO L82 PathProgramCache]: Analyzing trace with hash 2121693311, now seen corresponding path program 35 times [2020-12-22 23:50:07,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:07,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891681708] [2020-12-22 23:50:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-12-22 23:50:09,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891681708] [2020-12-22 23:50:09,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050628029] [2020-12-22 23:50:09,129 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:52,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2020-12-22 23:50:52,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:52,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 23:50:52,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 1 proven. 477 refuted. 0 times theorem prover too weak. 2166 trivial. 0 not checked. [2020-12-22 23:50:53,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:53,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 21] total 68 [2020-12-22 23:50:53,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667715206] [2020-12-22 23:50:53,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 23:50:53,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:53,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 23:50:53,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1385, Invalid=3171, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 23:50:53,965 INFO L87 Difference]: Start difference. First operand 234 states and 274 transitions. Second operand 68 states. [2020-12-22 23:50:54,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:54,398 INFO L93 Difference]: Finished difference Result 386 states and 472 transitions. [2020-12-22 23:50:54,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-22 23:50:54,399 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 178 [2020-12-22 23:50:54,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:54,400 INFO L225 Difference]: With dead ends: 386 [2020-12-22 23:50:54,400 INFO L226 Difference]: Without dead ends: 247 [2020-12-22 23:50:54,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1385, Invalid=3171, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 23:50:54,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-12-22 23:50:54,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 242. [2020-12-22 23:50:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-12-22 23:50:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 284 transitions. [2020-12-22 23:50:54,411 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 284 transitions. Word has length 178 [2020-12-22 23:50:54,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:54,412 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 284 transitions. [2020-12-22 23:50:54,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 23:50:54,412 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 284 transitions. [2020-12-22 23:50:54,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-12-22 23:50:54,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:54,413 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 19, 19, 19, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:54,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 23:50:54,629 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:54,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:54,630 INFO L82 PathProgramCache]: Analyzing trace with hash -226462307, now seen corresponding path program 36 times [2020-12-22 23:50:54,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:54,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853731569] [2020-12-22 23:50:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2020-12-22 23:50:56,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853731569] [2020-12-22 23:50:56,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406192788] [2020-12-22 23:50:56,198 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:06,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-22 23:51:06,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:06,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 23:51:06,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:07,691 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:51:07,693 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:51:08,047 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:51:08,048 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:51:08,049 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 23:51:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 1 proven. 850 refuted. 0 times theorem prover too weak. 1941 trivial. 0 not checked. [2020-12-22 23:51:08,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:08,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27] total 74 [2020-12-22 23:51:08,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043480244] [2020-12-22 23:51:08,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-22 23:51:08,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:08,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-22 23:51:08,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=3882, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 23:51:08,169 INFO L87 Difference]: Start difference. First operand 242 states and 284 transitions. Second operand 74 states. [2020-12-22 23:51:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:11,238 INFO L93 Difference]: Finished difference Result 482 states and 596 transitions. [2020-12-22 23:51:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-22 23:51:11,239 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 183 [2020-12-22 23:51:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:11,241 INFO L225 Difference]: With dead ends: 482 [2020-12-22 23:51:11,241 INFO L226 Difference]: Without dead ends: 337 [2020-12-22 23:51:11,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1600, Invalid=6056, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 23:51:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-12-22 23:51:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 248. [2020-12-22 23:51:11,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-12-22 23:51:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 290 transitions. [2020-12-22 23:51:11,255 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 290 transitions. Word has length 183 [2020-12-22 23:51:11,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:11,255 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 290 transitions. [2020-12-22 23:51:11,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-22 23:51:11,255 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 290 transitions. [2020-12-22 23:51:11,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-12-22 23:51:11,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:11,257 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 19, 19, 19, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:11,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:11,470 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:11,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:11,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1407592879, now seen corresponding path program 37 times [2020-12-22 23:51:11,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:11,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468833085] [2020-12-22 23:51:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2909 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-22 23:51:13,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468833085] [2020-12-22 23:51:13,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811532388] [2020-12-22 23:51:13,145 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:13,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 23:51:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2909 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-22 23:51:13,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:13,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-22 23:51:13,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658243902] [2020-12-22 23:51:13,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 23:51:13,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:13,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 23:51:13,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 23:51:13,509 INFO L87 Difference]: Start difference. First operand 248 states and 290 transitions. Second operand 52 states. [2020-12-22 23:51:13,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:13,703 INFO L93 Difference]: Finished difference Result 400 states and 484 transitions. [2020-12-22 23:51:13,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 23:51:13,704 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 189 [2020-12-22 23:51:13,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:13,705 INFO L225 Difference]: With dead ends: 400 [2020-12-22 23:51:13,705 INFO L226 Difference]: Without dead ends: 251 [2020-12-22 23:51:13,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 23:51:13,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-22 23:51:13,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2020-12-22 23:51:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-12-22 23:51:13,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 292 transitions. [2020-12-22 23:51:13,718 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 292 transitions. Word has length 189 [2020-12-22 23:51:13,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:13,718 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 292 transitions. [2020-12-22 23:51:13,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 23:51:13,718 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 292 transitions. [2020-12-22 23:51:13,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-22 23:51:13,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:13,719 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 19, 19, 19, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:13,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 23:51:13,934 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:13,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:13,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1729470607, now seen corresponding path program 38 times [2020-12-22 23:51:13,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:13,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505804110] [2020-12-22 23:51:13,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3006 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-22 23:51:15,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505804110] [2020-12-22 23:51:15,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487800267] [2020-12-22 23:51:15,704 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:15,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:51:15,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:15,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 23:51:15,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3006 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-22 23:51:16,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:16,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-22 23:51:16,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129736508] [2020-12-22 23:51:16,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 23:51:16,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:16,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 23:51:16,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 23:51:16,085 INFO L87 Difference]: Start difference. First operand 250 states and 292 transitions. Second operand 53 states. [2020-12-22 23:51:16,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:16,264 INFO L93 Difference]: Finished difference Result 402 states and 486 transitions. [2020-12-22 23:51:16,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 23:51:16,264 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 191 [2020-12-22 23:51:16,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:16,266 INFO L225 Difference]: With dead ends: 402 [2020-12-22 23:51:16,266 INFO L226 Difference]: Without dead ends: 253 [2020-12-22 23:51:16,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 23:51:16,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-22 23:51:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2020-12-22 23:51:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-12-22 23:51:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 294 transitions. [2020-12-22 23:51:16,278 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 294 transitions. Word has length 191 [2020-12-22 23:51:16,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:16,278 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 294 transitions. [2020-12-22 23:51:16,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 23:51:16,279 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 294 transitions. [2020-12-22 23:51:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-12-22 23:51:16,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:16,280 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 19, 19, 19, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:16,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 23:51:16,493 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:16,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:16,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1380438861, now seen corresponding path program 39 times [2020-12-22 23:51:16,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:16,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786073256] [2020-12-22 23:51:16,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-12-22 23:51:18,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786073256] [2020-12-22 23:51:18,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146832649] [2020-12-22 23:51:18,316 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:18,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-22 23:51:18,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:18,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 23:51:18,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 100 proven. 532 refuted. 0 times theorem prover too weak. 2473 trivial. 0 not checked. [2020-12-22 23:51:20,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:20,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 24] total 75 [2020-12-22 23:51:20,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098843293] [2020-12-22 23:51:20,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-22 23:51:20,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:20,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-22 23:51:20,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=3835, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 23:51:20,131 INFO L87 Difference]: Start difference. First operand 252 states and 294 transitions. Second operand 75 states. [2020-12-22 23:51:21,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:21,679 INFO L93 Difference]: Finished difference Result 415 states and 506 transitions. [2020-12-22 23:51:21,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 23:51:21,679 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 193 [2020-12-22 23:51:21,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:21,681 INFO L225 Difference]: With dead ends: 415 [2020-12-22 23:51:21,681 INFO L226 Difference]: Without dead ends: 266 [2020-12-22 23:51:21,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2175, Invalid=6755, Unknown=0, NotChecked=0, Total=8930 [2020-12-22 23:51:21,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-22 23:51:21,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2020-12-22 23:51:21,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-22 23:51:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 306 transitions. [2020-12-22 23:51:21,696 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 306 transitions. Word has length 193 [2020-12-22 23:51:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:21,697 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 306 transitions. [2020-12-22 23:51:21,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-22 23:51:21,697 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 306 transitions. [2020-12-22 23:51:21,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-12-22 23:51:21,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:21,698 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 20, 20, 20, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:21,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:21,912 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:21,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:21,913 INFO L82 PathProgramCache]: Analyzing trace with hash 420994817, now seen corresponding path program 40 times [2020-12-22 23:51:21,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:21,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221597271] [2020-12-22 23:51:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-12-22 23:51:23,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221597271] [2020-12-22 23:51:23,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18189445] [2020-12-22 23:51:23,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:24,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:51:24,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:24,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 23:51:24,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-12-22 23:51:24,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:24,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-22 23:51:24,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284457488] [2020-12-22 23:51:24,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 23:51:24,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:24,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 23:51:24,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 23:51:24,235 INFO L87 Difference]: Start difference. First operand 262 states and 306 transitions. Second operand 56 states. [2020-12-22 23:51:24,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:24,468 INFO L93 Difference]: Finished difference Result 420 states and 508 transitions. [2020-12-22 23:51:24,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 23:51:24,469 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 200 [2020-12-22 23:51:24,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:24,472 INFO L225 Difference]: With dead ends: 420 [2020-12-22 23:51:24,472 INFO L226 Difference]: Without dead ends: 265 [2020-12-22 23:51:24,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 23:51:24,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-22 23:51:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2020-12-22 23:51:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-12-22 23:51:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 308 transitions. [2020-12-22 23:51:24,486 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 308 transitions. Word has length 200 [2020-12-22 23:51:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:24,486 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 308 transitions. [2020-12-22 23:51:24,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 23:51:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 308 transitions. [2020-12-22 23:51:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-22 23:51:24,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:24,488 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 20, 20, 20, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:24,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-22 23:51:24,702 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:24,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:24,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1287643651, now seen corresponding path program 41 times [2020-12-22 23:51:24,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:24,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461951925] [2020-12-22 23:51:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3472 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-12-22 23:51:26,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461951925] [2020-12-22 23:51:26,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277940828] [2020-12-22 23:51:26,780 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true