/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-programs/partial_mod_count_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:28:44,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:28:44,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:28:44,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:28:44,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:28:44,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:28:44,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:28:44,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:28:44,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:28:44,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:28:44,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:28:44,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:28:44,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:28:44,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:28:44,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:28:44,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:28:44,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:28:44,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:28:44,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:28:44,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:28:44,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:28:44,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:28:44,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:28:44,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:28:44,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:28:44,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:28:44,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:28:44,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:28:44,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:28:44,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:28:44,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:28:44,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:28:44,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:28:44,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:28:44,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:28:44,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:28:44,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:28:44,856 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:28:44,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:28:44,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:28:44,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:28:44,859 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:28:44,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:28:44,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:28:44,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:28:44,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:28:44,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:28:44,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:28:44,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:28:44,860 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:28:44,860 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:28:44,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:28:44,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:28:44,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:28:44,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:28:44,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:28:44,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:28:44,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:28:44,862 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:28:44,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:28:44,862 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:28:44,863 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:28:44,863 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:28:45,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:28:45,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:28:45,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:28:45,326 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:28:45,327 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:28:45,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_2.c [2021-01-06 10:28:45,416 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/93f20759b/7dacd81a1b784891854abd0ba4dee29e/FLAGcbabb2dad [2021-01-06 10:28:46,027 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:28:46,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_2.c [2021-01-06 10:28:46,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/93f20759b/7dacd81a1b784891854abd0ba4dee29e/FLAGcbabb2dad [2021-01-06 10:28:46,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/93f20759b/7dacd81a1b784891854abd0ba4dee29e [2021-01-06 10:28:46,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:28:46,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:28:46,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:28:46,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:28:46,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:28:46,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:28:46" (1/1) ... [2021-01-06 10:28:46,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71943c68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:46, skipping insertion in model container [2021-01-06 10:28:46,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:28:46" (1/1) ... [2021-01-06 10:28:46,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:28:46,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:28:46,594 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-programs/partial_mod_count_2.c[323,336] left hand side expression in assignment: lhs: VariableLHS[~i~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,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:28:46,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:28:46,629 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:28:46,644 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-programs/partial_mod_count_2.c[323,336] left hand side expression in assignment: lhs: VariableLHS[~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],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],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:28:46,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:28:46,672 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:28:46,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:46 WrapperNode [2021-01-06 10:28:46,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:28:46,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:28:46,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:28:46,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:28:46,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:46" (1/1) ... [2021-01-06 10:28:46,694 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:46" (1/1) ... [2021-01-06 10:28:46,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:28:46,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:28:46,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:28:46,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:28:46,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:46" (1/1) ... [2021-01-06 10:28:46,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:46" (1/1) ... [2021-01-06 10:28:46,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:46" (1/1) ... [2021-01-06 10:28:46,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:46" (1/1) ... [2021-01-06 10:28:46,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:46" (1/1) ... [2021-01-06 10:28:46,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:46" (1/1) ... [2021-01-06 10:28:46,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:46" (1/1) ... [2021-01-06 10:28:46,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:28:46,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:28:46,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:28:46,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:28:46,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:46" (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 [2021-01-06 10:28:46,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:28:46,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:28:46,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:28:46,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:28:46,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:28:46,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:28:46,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:28:47,205 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:28:47,206 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 10:28:47,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:28:47 BoogieIcfgContainer [2021-01-06 10:28:47,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:28:47,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:28:47,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:28:47,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:28:47,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:28:46" (1/3) ... [2021-01-06 10:28:47,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4870204f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:28:47, skipping insertion in model container [2021-01-06 10:28:47,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:46" (2/3) ... [2021-01-06 10:28:47,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4870204f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:28:47, skipping insertion in model container [2021-01-06 10:28:47,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:28:47" (3/3) ... [2021-01-06 10:28:47,217 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_2.c [2021-01-06 10:28:47,224 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:28:47,230 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:28:47,252 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:28:47,318 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:28:47,319 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:28:47,319 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:28:47,319 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:28:47,319 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:28:47,319 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:28:47,319 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:28:47,320 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:28:47,352 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 10:28:47,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:28:47,371 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:47,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:47,372 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:47,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:47,392 INFO L82 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2021-01-06 10:28:47,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:47,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414400551] [2021-01-06 10:28:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:47,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414400551] [2021-01-06 10:28:47,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:28:47,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:28:47,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192068504] [2021-01-06 10:28:47,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:28:47,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:47,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:28:47,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:28:47,720 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2021-01-06 10:28:47,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:47,746 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-01-06 10:28:47,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:28:47,748 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 10:28:47,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:47,776 INFO L225 Difference]: With dead ends: 29 [2021-01-06 10:28:47,777 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 10:28:47,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:28:47,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 10:28:47,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 10:28:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 10:28:47,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-01-06 10:28:47,829 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2021-01-06 10:28:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:47,830 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-01-06 10:28:47,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:28:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-01-06 10:28:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:28:47,832 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:47,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:47,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:28:47,834 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:47,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:47,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2021-01-06 10:28:47,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:47,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980799515] [2021-01-06 10:28:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:47,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980799515] [2021-01-06 10:28:47,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:28:47,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:28:47,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585434009] [2021-01-06 10:28:47,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:28:47,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:47,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:28:47,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:28:47,964 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2021-01-06 10:28:48,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:48,030 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-01-06 10:28:48,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:28:48,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-01-06 10:28:48,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:48,032 INFO L225 Difference]: With dead ends: 34 [2021-01-06 10:28:48,032 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 10:28:48,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:28:48,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 10:28:48,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2021-01-06 10:28:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 10:28:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-01-06 10:28:48,039 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2021-01-06 10:28:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:48,039 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-01-06 10:28:48,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:28:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-01-06 10:28:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 10:28:48,040 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:48,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:48,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:28:48,041 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:48,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:48,042 INFO L82 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2021-01-06 10:28:48,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:48,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441804688] [2021-01-06 10:28:48,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:48,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441804688] [2021-01-06 10:28:48,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906668740] [2021-01-06 10:28:48,131 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 [2021-01-06 10:28:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:48,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:28:48,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:48,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:48,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 10:28:48,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799906089] [2021-01-06 10:28:48,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:28:48,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:48,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:28:48,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:28:48,292 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 7 states. [2021-01-06 10:28:48,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:48,365 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-01-06 10:28:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:28:48,366 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 10:28:48,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:48,367 INFO L225 Difference]: With dead ends: 44 [2021-01-06 10:28:48,367 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:28:48,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:28:48,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:28:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2021-01-06 10:28:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 10:28:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-01-06 10:28:48,374 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-01-06 10:28:48,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:48,375 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-01-06 10:28:48,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:28:48,375 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-01-06 10:28:48,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:28:48,376 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:48,376 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:48,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:28:48,590 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:48,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:48,592 INFO L82 PathProgramCache]: Analyzing trace with hash 982026547, now seen corresponding path program 2 times [2021-01-06 10:28:48,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:48,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308454490] [2021-01-06 10:28:48,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:28:48,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308454490] [2021-01-06 10:28:48,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024546525] [2021-01-06 10:28:48,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:48,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:28:48,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:48,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:28:48,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:48,890 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:48,916 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 10:28:48,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:48,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-01-06 10:28:48,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243783905] [2021-01-06 10:28:48,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:28:48,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:48,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:28:48,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:48,951 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2021-01-06 10:28:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:49,097 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-01-06 10:28:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:28:49,098 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-06 10:28:49,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:49,101 INFO L225 Difference]: With dead ends: 35 [2021-01-06 10:28:49,102 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:28:49,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:28:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:28:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-01-06 10:28:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:28:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-01-06 10:28:49,126 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2021-01-06 10:28:49,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:49,128 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-01-06 10:28:49,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:28:49,128 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-01-06 10:28:49,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 10:28:49,129 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:49,130 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:49,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:49,345 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:49,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:49,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1305492527, now seen corresponding path program 1 times [2021-01-06 10:28:49,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:49,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608575045] [2021-01-06 10:28:49,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:49,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608575045] [2021-01-06 10:28:49,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538523977] [2021-01-06 10:28:49,489 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 [2021-01-06 10:28:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:49,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:28:49,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:49,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:49,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 10:28:49,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75813979] [2021-01-06 10:28:49,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:28:49,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:49,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:28:49,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:49,627 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2021-01-06 10:28:49,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:49,713 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2021-01-06 10:28:49,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:28:49,714 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2021-01-06 10:28:49,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:49,716 INFO L225 Difference]: With dead ends: 93 [2021-01-06 10:28:49,716 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 10:28:49,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:49,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 10:28:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2021-01-06 10:28:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 10:28:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-01-06 10:28:49,725 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2021-01-06 10:28:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:49,725 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-01-06 10:28:49,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:28:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-01-06 10:28:49,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 10:28:49,727 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:49,727 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:49,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:49,941 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:49,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:49,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1739926453, now seen corresponding path program 2 times [2021-01-06 10:28:49,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:49,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872506942] [2021-01-06 10:28:49,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:49,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:50,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872506942] [2021-01-06 10:28:50,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134484910] [2021-01-06 10:28:50,025 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 [2021-01-06 10:28:50,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:50,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:50,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:28:50,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:50,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:50,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 10:28:50,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997306312] [2021-01-06 10:28:50,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:28:50,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:50,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:28:50,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:50,182 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 11 states. [2021-01-06 10:28:50,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:50,284 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2021-01-06 10:28:50,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:28:50,285 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2021-01-06 10:28:50,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:50,286 INFO L225 Difference]: With dead ends: 113 [2021-01-06 10:28:50,287 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 10:28:50,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:50,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 10:28:50,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 34. [2021-01-06 10:28:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:28:50,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-01-06 10:28:50,295 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2021-01-06 10:28:50,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:50,295 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-01-06 10:28:50,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:28:50,295 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-01-06 10:28:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:28:50,296 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:50,297 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:50,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:50,513 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:50,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:50,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1070414225, now seen corresponding path program 3 times [2021-01-06 10:28:50,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:50,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066360545] [2021-01-06 10:28:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:50,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066360545] [2021-01-06 10:28:50,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523645088] [2021-01-06 10:28:50,603 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 [2021-01-06 10:28:50,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:28:50,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:50,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:28:50,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-01-06 10:28:50,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:50,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-01-06 10:28:50,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119191575] [2021-01-06 10:28:50,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:28:50,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:50,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:28:50,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:28:50,743 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2021-01-06 10:28:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:50,825 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2021-01-06 10:28:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:28:50,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2021-01-06 10:28:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:50,826 INFO L225 Difference]: With dead ends: 79 [2021-01-06 10:28:50,826 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 10:28:50,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:28:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 10:28:50,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2021-01-06 10:28:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 10:28:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-01-06 10:28:50,834 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2021-01-06 10:28:50,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:50,834 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-01-06 10:28:50,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:28:50,835 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-01-06 10:28:50,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:28:50,835 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:50,836 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:51,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 10:28:51,052 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:51,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:51,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1120934345, now seen corresponding path program 1 times [2021-01-06 10:28:51,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:51,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102547919] [2021-01-06 10:28:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:51,073 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:51,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696339237] [2021-01-06 10:28:51,074 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 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 [2021-01-06 10:28:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:51,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:28:51,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:51,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102547919] [2021-01-06 10:28:51,276 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:51,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696339237] [2021-01-06 10:28:51,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:51,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:28:51,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639243100] [2021-01-06 10:28:51,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:28:51,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:51,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:28:51,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:51,279 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2021-01-06 10:28:51,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:51,428 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2021-01-06 10:28:51,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:28:51,429 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2021-01-06 10:28:51,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:51,431 INFO L225 Difference]: With dead ends: 157 [2021-01-06 10:28:51,431 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 10:28:51,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 10:28:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2021-01-06 10:28:51,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 10:28:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-01-06 10:28:51,441 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2021-01-06 10:28:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:51,441 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-01-06 10:28:51,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:28:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-01-06 10:28:51,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:28:51,443 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:51,443 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:51,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:51,658 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:51,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2107317257, now seen corresponding path program 2 times [2021-01-06 10:28:51,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:51,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361193700] [2021-01-06 10:28:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:51,678 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:51,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1387291936] [2021-01-06 10:28:51,679 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 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 [2021-01-06 10:28:51,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:51,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:51,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:28:51,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:28:51,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361193700] [2021-01-06 10:28:51,937 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:51,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387291936] [2021-01-06 10:28:51,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:51,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:28:51,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420083529] [2021-01-06 10:28:51,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:28:51,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:51,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:28:51,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:51,940 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 11 states. [2021-01-06 10:28:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:52,106 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2021-01-06 10:28:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:28:52,107 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2021-01-06 10:28:52,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:52,108 INFO L225 Difference]: With dead ends: 197 [2021-01-06 10:28:52,109 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 10:28:52,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 10:28:52,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 48. [2021-01-06 10:28:52,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:28:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-01-06 10:28:52,119 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2021-01-06 10:28:52,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:52,119 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-01-06 10:28:52,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:28:52,120 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-01-06 10:28:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:28:52,121 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:52,121 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:52,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:52,328 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:52,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:52,329 INFO L82 PathProgramCache]: Analyzing trace with hash -975924809, now seen corresponding path program 3 times [2021-01-06 10:28:52,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:52,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298575512] [2021-01-06 10:28:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:52,350 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:52,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116895951] [2021-01-06 10:28:52,352 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 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 [2021-01-06 10:28:52,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:28:52,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:52,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:28:52,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-01-06 10:28:52,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298575512] [2021-01-06 10:28:52,604 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:52,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116895951] [2021-01-06 10:28:52,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:52,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:28:52,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417433981] [2021-01-06 10:28:52,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:28:52,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:52,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:28:52,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:28:52,607 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2021-01-06 10:28:52,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:52,727 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-01-06 10:28:52,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:28:52,728 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2021-01-06 10:28:52,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:52,729 INFO L225 Difference]: With dead ends: 60 [2021-01-06 10:28:52,729 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 10:28:52,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:52,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 10:28:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-01-06 10:28:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 10:28:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-01-06 10:28:52,744 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2021-01-06 10:28:52,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:52,744 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-01-06 10:28:52,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:28:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-01-06 10:28:52,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:28:52,746 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:52,746 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:52,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:28:52,961 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:52,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:52,962 INFO L82 PathProgramCache]: Analyzing trace with hash 2047403563, now seen corresponding path program 4 times [2021-01-06 10:28:52,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:52,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522422680] [2021-01-06 10:28:52,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:52,976 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:52,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789743372] [2021-01-06 10:28:52,977 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 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 [2021-01-06 10:28:53,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:28:53,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:53,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:28:53,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:28:53,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522422680] [2021-01-06 10:28:53,279 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:53,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789743372] [2021-01-06 10:28:53,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:53,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:28:53,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57474514] [2021-01-06 10:28:53,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:28:53,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:53,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:28:53,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:28:53,282 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 13 states. [2021-01-06 10:28:53,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:53,614 INFO L93 Difference]: Finished difference Result 211 states and 246 transitions. [2021-01-06 10:28:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:28:53,615 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2021-01-06 10:28:53,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:53,617 INFO L225 Difference]: With dead ends: 211 [2021-01-06 10:28:53,617 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 10:28:53,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=114, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:28:53,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 10:28:53,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 56. [2021-01-06 10:28:53,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:28:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-01-06 10:28:53,628 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 46 [2021-01-06 10:28:53,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:53,628 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-01-06 10:28:53,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:28:53,629 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-01-06 10:28:53,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:28:53,630 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:53,630 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:53,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:53,845 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:53,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:53,846 INFO L82 PathProgramCache]: Analyzing trace with hash -520854285, now seen corresponding path program 5 times [2021-01-06 10:28:53,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:53,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522826182] [2021-01-06 10:28:53,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:53,863 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:53,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877137689] [2021-01-06 10:28:53,864 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 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 [2021-01-06 10:28:54,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 10:28:54,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:54,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:28:54,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:28:54,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522826182] [2021-01-06 10:28:54,389 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:54,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877137689] [2021-01-06 10:28:54,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:54,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:28:54,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589692380] [2021-01-06 10:28:54,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:28:54,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:54,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:28:54,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:28:54,396 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 14 states. [2021-01-06 10:28:54,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:54,611 INFO L93 Difference]: Finished difference Result 314 states and 369 transitions. [2021-01-06 10:28:54,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:28:54,612 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2021-01-06 10:28:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:54,614 INFO L225 Difference]: With dead ends: 314 [2021-01-06 10:28:54,614 INFO L226 Difference]: Without dead ends: 283 [2021-01-06 10:28:54,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:28:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-01-06 10:28:54,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 65. [2021-01-06 10:28:54,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 10:28:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-01-06 10:28:54,627 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 49 [2021-01-06 10:28:54,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:54,627 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-01-06 10:28:54,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:28:54,627 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-01-06 10:28:54,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 10:28:54,628 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:54,628 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:54,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:54,834 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:54,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:54,835 INFO L82 PathProgramCache]: Analyzing trace with hash -69913235, now seen corresponding path program 6 times [2021-01-06 10:28:54,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:54,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934742649] [2021-01-06 10:28:54,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:54,873 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:54,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022386408] [2021-01-06 10:28:54,875 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 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 [2021-01-06 10:28:55,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:28:55,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:55,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:28:55,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-01-06 10:28:55,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934742649] [2021-01-06 10:28:55,234 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:55,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022386408] [2021-01-06 10:28:55,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:55,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:28:55,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946003250] [2021-01-06 10:28:55,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:28:55,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:55,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:28:55,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:55,244 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 9 states. [2021-01-06 10:28:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:55,359 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-01-06 10:28:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:28:55,359 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2021-01-06 10:28:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:55,363 INFO L225 Difference]: With dead ends: 77 [2021-01-06 10:28:55,364 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:28:55,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:28:55,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:28:55,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-01-06 10:28:55,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 10:28:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-01-06 10:28:55,379 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2021-01-06 10:28:55,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:55,379 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-01-06 10:28:55,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:28:55,380 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-01-06 10:28:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:28:55,382 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:55,382 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:55,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:28:55,587 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:55,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:55,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1619534901, now seen corresponding path program 7 times [2021-01-06 10:28:55,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:55,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518916933] [2021-01-06 10:28:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:55,606 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:55,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539802905] [2021-01-06 10:28:55,606 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 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 [2021-01-06 10:28:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:55,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:28:55,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:28:55,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518916933] [2021-01-06 10:28:55,986 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:55,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539802905] [2021-01-06 10:28:55,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:55,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 10:28:55,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430881224] [2021-01-06 10:28:55,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:28:55,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:55,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:28:55,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:28:55,989 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 17 states. [2021-01-06 10:28:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:56,289 INFO L93 Difference]: Finished difference Result 450 states and 529 transitions. [2021-01-06 10:28:56,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:28:56,290 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2021-01-06 10:28:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:56,292 INFO L225 Difference]: With dead ends: 450 [2021-01-06 10:28:56,292 INFO L226 Difference]: Without dead ends: 414 [2021-01-06 10:28:56,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:28:56,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-01-06 10:28:56,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 79. [2021-01-06 10:28:56,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 10:28:56,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-01-06 10:28:56,306 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2021-01-06 10:28:56,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:56,306 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-01-06 10:28:56,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:28:56,306 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-01-06 10:28:56,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 10:28:56,307 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:56,308 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:56,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:28:56,522 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:56,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:56,523 INFO L82 PathProgramCache]: Analyzing trace with hash 206411567, now seen corresponding path program 8 times [2021-01-06 10:28:56,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:56,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84074577] [2021-01-06 10:28:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:56,550 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:56,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558318694] [2021-01-06 10:28:56,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-06 10:28:56,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:56,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:56,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:28:56,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:28:57,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84074577] [2021-01-06 10:28:57,015 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:57,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558318694] [2021-01-06 10:28:57,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:57,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-01-06 10:28:57,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432156505] [2021-01-06 10:28:57,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:28:57,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:57,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:28:57,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:28:57,018 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 20 states. [2021-01-06 10:28:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:57,377 INFO L93 Difference]: Finished difference Result 540 states and 634 transitions. [2021-01-06 10:28:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:28:57,378 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2021-01-06 10:28:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:57,380 INFO L225 Difference]: With dead ends: 540 [2021-01-06 10:28:57,381 INFO L226 Difference]: Without dead ends: 504 [2021-01-06 10:28:57,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:28:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-01-06 10:28:57,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 88. [2021-01-06 10:28:57,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 10:28:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-01-06 10:28:57,394 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 72 [2021-01-06 10:28:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:57,394 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-01-06 10:28:57,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:28:57,394 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-01-06 10:28:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 10:28:57,395 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:57,396 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:57,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:28:57,610 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:57,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:57,611 INFO L82 PathProgramCache]: Analyzing trace with hash 306240885, now seen corresponding path program 9 times [2021-01-06 10:28:57,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:57,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611796119] [2021-01-06 10:28:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:57,631 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:57,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279375944] [2021-01-06 10:28:57,631 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 [2021-01-06 10:28:57,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:28:57,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:57,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:28:57,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:28:58,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611796119] [2021-01-06 10:28:58,020 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:58,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279375944] [2021-01-06 10:28:58,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:58,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:28:58,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154289986] [2021-01-06 10:28:58,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:28:58,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:58,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:28:58,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:28:58,022 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 10 states. [2021-01-06 10:28:58,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:58,179 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2021-01-06 10:28:58,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:28:58,180 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2021-01-06 10:28:58,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:58,181 INFO L225 Difference]: With dead ends: 100 [2021-01-06 10:28:58,181 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 10:28:58,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:28:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 10:28:58,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-01-06 10:28:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 10:28:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2021-01-06 10:28:58,207 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 81 [2021-01-06 10:28:58,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:58,207 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2021-01-06 10:28:58,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:28:58,207 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2021-01-06 10:28:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:28:58,208 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:58,209 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:58,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:58,412 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:58,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:58,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1355563309, now seen corresponding path program 10 times [2021-01-06 10:28:58,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:58,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313561373] [2021-01-06 10:28:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:58,434 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:58,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265068697] [2021-01-06 10:28:58,435 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 [2021-01-06 10:28:58,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:28:58,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:58,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:28:58,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 508 proven. 24 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:28:58,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313561373] [2021-01-06 10:28:58,999 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:59,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265068697] [2021-01-06 10:28:59,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:59,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-01-06 10:28:59,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993549861] [2021-01-06 10:28:59,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:28:59,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:59,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:28:59,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:28:59,002 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 23 states. [2021-01-06 10:28:59,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:59,825 INFO L93 Difference]: Finished difference Result 580 states and 680 transitions. [2021-01-06 10:28:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:28:59,826 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2021-01-06 10:28:59,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:59,829 INFO L225 Difference]: With dead ends: 580 [2021-01-06 10:28:59,829 INFO L226 Difference]: Without dead ends: 547 [2021-01-06 10:28:59,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2021-01-06 10:28:59,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-01-06 10:28:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 96. [2021-01-06 10:28:59,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:28:59,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-01-06 10:28:59,843 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 86 [2021-01-06 10:28:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:59,844 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-01-06 10:28:59,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:28:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-01-06 10:28:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 10:28:59,845 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:59,845 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:00,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:29:00,060 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:00,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:00,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1036957617, now seen corresponding path program 11 times [2021-01-06 10:29:00,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:00,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299851236] [2021-01-06 10:29:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:00,079 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:00,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376056393] [2021-01-06 10:29:00,080 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 [2021-01-06 10:29:00,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-01-06 10:29:00,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:00,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:29:00,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:29:01,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299851236] [2021-01-06 10:29:01,392 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:01,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376056393] [2021-01-06 10:29:01,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:01,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-01-06 10:29:01,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966115014] [2021-01-06 10:29:01,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:29:01,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:01,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:29:01,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:29:01,395 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 24 states. [2021-01-06 10:29:01,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:01,875 INFO L93 Difference]: Finished difference Result 757 states and 892 transitions. [2021-01-06 10:29:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:29:01,876 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2021-01-06 10:29:01,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:01,881 INFO L225 Difference]: With dead ends: 757 [2021-01-06 10:29:01,881 INFO L226 Difference]: Without dead ends: 713 [2021-01-06 10:29:01,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:29:01,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-01-06 10:29:01,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 108. [2021-01-06 10:29:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 10:29:01,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2021-01-06 10:29:01,899 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 89 [2021-01-06 10:29:01,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:01,899 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2021-01-06 10:29:01,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:29:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2021-01-06 10:29:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:29:01,900 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:01,900 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:02,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:29:02,107 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:02,108 INFO L82 PathProgramCache]: Analyzing trace with hash -445045967, now seen corresponding path program 12 times [2021-01-06 10:29:02,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:02,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335400720] [2021-01-06 10:29:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:02,131 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:02,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166861566] [2021-01-06 10:29:02,131 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 [2021-01-06 10:29:02,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:29:02,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:02,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:29:02,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-01-06 10:29:02,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335400720] [2021-01-06 10:29:02,664 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:02,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166861566] [2021-01-06 10:29:02,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:02,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:29:02,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816639472] [2021-01-06 10:29:02,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:29:02,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:02,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:29:02,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:29:02,666 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 11 states. [2021-01-06 10:29:02,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:02,857 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2021-01-06 10:29:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:29:02,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2021-01-06 10:29:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:02,860 INFO L225 Difference]: With dead ends: 120 [2021-01-06 10:29:02,861 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 10:29:02,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:29:02,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 10:29:02,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2021-01-06 10:29:02,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 10:29:02,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2021-01-06 10:29:02,874 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 101 [2021-01-06 10:29:02,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:02,874 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2021-01-06 10:29:02,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:29:02,874 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2021-01-06 10:29:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 10:29:02,875 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:02,876 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:03,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:03,089 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:03,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:03,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1077530383, now seen corresponding path program 13 times [2021-01-06 10:29:03,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:03,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495335319] [2021-01-06 10:29:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:03,133 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:03,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107890409] [2021-01-06 10:29:03,133 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 [2021-01-06 10:29:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:03,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:29:03,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:29:03,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495335319] [2021-01-06 10:29:03,977 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:03,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107890409] [2021-01-06 10:29:03,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:03,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-01-06 10:29:03,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862569252] [2021-01-06 10:29:03,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:29:03,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:03,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:29:03,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:29:03,979 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 28 states. [2021-01-06 10:29:04,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:04,556 INFO L93 Difference]: Finished difference Result 1003 states and 1183 transitions. [2021-01-06 10:29:04,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:29:04,557 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2021-01-06 10:29:04,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:04,580 INFO L225 Difference]: With dead ends: 1003 [2021-01-06 10:29:04,580 INFO L226 Difference]: Without dead ends: 954 [2021-01-06 10:29:04,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:29:04,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-01-06 10:29:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 125. [2021-01-06 10:29:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 10:29:04,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2021-01-06 10:29:04,606 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 106 [2021-01-06 10:29:04,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:04,607 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2021-01-06 10:29:04,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:29:04,607 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2021-01-06 10:29:04,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 10:29:04,608 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:04,608 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:04,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:04,822 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:04,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:04,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1674589553, now seen corresponding path program 14 times [2021-01-06 10:29:04,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:04,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025074078] [2021-01-06 10:29:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:04,846 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:04,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209858438] [2021-01-06 10:29:04,847 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 [2021-01-06 10:29:04,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:04,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:04,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 10:29:04,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:29:05,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025074078] [2021-01-06 10:29:05,973 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:05,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209858438] [2021-01-06 10:29:05,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:05,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-01-06 10:29:05,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775604860] [2021-01-06 10:29:05,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:29:05,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:05,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:29:05,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:29:05,976 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 32 states. [2021-01-06 10:29:06,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:06,646 INFO L93 Difference]: Finished difference Result 1163 states and 1371 transitions. [2021-01-06 10:29:06,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:29:06,647 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2021-01-06 10:29:06,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:06,652 INFO L225 Difference]: With dead ends: 1163 [2021-01-06 10:29:06,652 INFO L226 Difference]: Without dead ends: 1114 [2021-01-06 10:29:06,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:29:06,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-01-06 10:29:06,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 137. [2021-01-06 10:29:06,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 10:29:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2021-01-06 10:29:06,677 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 118 [2021-01-06 10:29:06,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:06,677 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2021-01-06 10:29:06,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:29:06,677 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2021-01-06 10:29:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 10:29:06,678 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:06,678 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:06,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:06,893 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:06,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:06,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1770554895, now seen corresponding path program 15 times [2021-01-06 10:29:06,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:06,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995835594] [2021-01-06 10:29:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:06,918 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:06,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937941998] [2021-01-06 10:29:06,919 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 [2021-01-06 10:29:07,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:29:07,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:07,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:29:07,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-01-06 10:29:07,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995835594] [2021-01-06 10:29:07,505 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:07,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937941998] [2021-01-06 10:29:07,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:07,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:29:07,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543696540] [2021-01-06 10:29:07,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:29:07,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:07,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:29:07,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:29:07,507 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 12 states. [2021-01-06 10:29:07,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:07,726 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2021-01-06 10:29:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:29:07,729 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2021-01-06 10:29:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:07,731 INFO L225 Difference]: With dead ends: 149 [2021-01-06 10:29:07,731 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 10:29:07,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:29:07,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 10:29:07,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2021-01-06 10:29:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2021-01-06 10:29:07,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2021-01-06 10:29:07,746 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 130 [2021-01-06 10:29:07,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:07,746 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2021-01-06 10:29:07,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:29:07,747 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2021-01-06 10:29:07,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-01-06 10:29:07,747 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:07,748 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:07,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:29:07,953 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:07,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:07,954 INFO L82 PathProgramCache]: Analyzing trace with hash 99619377, now seen corresponding path program 16 times [2021-01-06 10:29:07,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:07,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811184870] [2021-01-06 10:29:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:07,982 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:07,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435034117] [2021-01-06 10:29:07,982 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 [2021-01-06 10:29:08,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:08,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:08,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:29:08,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 1476 proven. 44 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-01-06 10:29:09,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811184870] [2021-01-06 10:29:09,260 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:09,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435034117] [2021-01-06 10:29:09,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:09,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-01-06 10:29:09,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103556891] [2021-01-06 10:29:09,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:29:09,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:09,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:29:09,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=665, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:29:09,263 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 36 states. [2021-01-06 10:29:10,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:10,842 INFO L93 Difference]: Finished difference Result 1247 states and 1469 transitions. [2021-01-06 10:29:10,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:29:10,842 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 135 [2021-01-06 10:29:10,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:10,850 INFO L225 Difference]: With dead ends: 1247 [2021-01-06 10:29:10,850 INFO L226 Difference]: Without dead ends: 1204 [2021-01-06 10:29:10,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=854, Invalid=952, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 10:29:10,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-01-06 10:29:10,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 145. [2021-01-06 10:29:10,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 10:29:10,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2021-01-06 10:29:10,876 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 135 [2021-01-06 10:29:10,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:10,877 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2021-01-06 10:29:10,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:29:10,877 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2021-01-06 10:29:10,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 10:29:10,878 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:10,878 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 29, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:11,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:29:11,092 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:11,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:11,093 INFO L82 PathProgramCache]: Analyzing trace with hash -274498259, now seen corresponding path program 17 times [2021-01-06 10:29:11,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:11,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651753626] [2021-01-06 10:29:11,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:11,119 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:11,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72652845] [2021-01-06 10:29:11,119 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 [2021-01-06 10:29:25,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-01-06 10:29:25,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:25,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:29:25,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-01-06 10:29:27,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651753626] [2021-01-06 10:29:27,221 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:27,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72652845] [2021-01-06 10:29:27,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:27,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-01-06 10:29:27,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054027986] [2021-01-06 10:29:27,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 10:29:27,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:27,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 10:29:27,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:29:27,224 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 37 states. [2021-01-06 10:29:28,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:28,356 INFO L93 Difference]: Finished difference Result 1515 states and 1790 transitions. [2021-01-06 10:29:28,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 10:29:28,357 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2021-01-06 10:29:28,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:28,365 INFO L225 Difference]: With dead ends: 1515 [2021-01-06 10:29:28,365 INFO L226 Difference]: Without dead ends: 1458 [2021-01-06 10:29:28,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:29:28,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-01-06 10:29:28,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 160. [2021-01-06 10:29:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-01-06 10:29:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2021-01-06 10:29:28,397 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 138 [2021-01-06 10:29:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:28,397 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2021-01-06 10:29:28,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 10:29:28,398 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2021-01-06 10:29:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-01-06 10:29:28,398 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:28,399 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:28,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:28,614 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:28,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:28,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1459861581, now seen corresponding path program 18 times [2021-01-06 10:29:28,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:28,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632070743] [2021-01-06 10:29:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:28,640 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:28,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547632001] [2021-01-06 10:29:28,641 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 [2021-01-06 10:29:29,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:29:29,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:29,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:29:29,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2021-01-06 10:29:29,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632070743] [2021-01-06 10:29:29,704 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:29,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547632001] [2021-01-06 10:29:29,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:29,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:29:29,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387825124] [2021-01-06 10:29:29,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:29:29,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:29,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:29:29,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:29:29,706 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 13 states. [2021-01-06 10:29:29,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:29,996 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2021-01-06 10:29:29,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:29:29,997 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2021-01-06 10:29:29,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:29,998 INFO L225 Difference]: With dead ends: 172 [2021-01-06 10:29:29,998 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 10:29:29,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:29:29,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 10:29:30,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2021-01-06 10:29:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 10:29:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2021-01-06 10:29:30,023 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 153 [2021-01-06 10:29:30,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:30,024 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2021-01-06 10:29:30,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:29:30,024 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2021-01-06 10:29:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-01-06 10:29:30,025 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:30,025 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:30,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:29:30,232 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:30,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:30,233 INFO L82 PathProgramCache]: Analyzing trace with hash 40865199, now seen corresponding path program 19 times [2021-01-06 10:29:30,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:30,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942362785] [2021-01-06 10:29:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:30,258 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:30,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097979671] [2021-01-06 10:29:30,259 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 [2021-01-06 10:29:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:30,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 10:29:30,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:29:31,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942362785] [2021-01-06 10:29:31,943 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:31,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097979671] [2021-01-06 10:29:31,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:31,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-01-06 10:29:31,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738321888] [2021-01-06 10:29:31,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 10:29:31,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:31,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 10:29:31,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:29:31,946 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand 42 states. [2021-01-06 10:29:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:33,240 INFO L93 Difference]: Finished difference Result 1906 states and 2254 transitions. [2021-01-06 10:29:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:29:33,241 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2021-01-06 10:29:33,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:33,248 INFO L225 Difference]: With dead ends: 1906 [2021-01-06 10:29:33,248 INFO L226 Difference]: Without dead ends: 1844 [2021-01-06 10:29:33,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:29:33,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-01-06 10:29:33,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 180. [2021-01-06 10:29:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 10:29:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2021-01-06 10:29:33,288 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 158 [2021-01-06 10:29:33,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:33,288 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2021-01-06 10:29:33,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 10:29:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2021-01-06 10:29:33,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-01-06 10:29:33,289 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:33,289 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 39, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:33,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:33,504 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:33,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:33,505 INFO L82 PathProgramCache]: Analyzing trace with hash -376448715, now seen corresponding path program 20 times [2021-01-06 10:29:33,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:33,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554040473] [2021-01-06 10:29:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:33,532 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:33,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116665130] [2021-01-06 10:29:33,532 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 [2021-01-06 10:29:33,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:33,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:33,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 10:29:33,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:29:35,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554040473] [2021-01-06 10:29:35,568 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:35,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116665130] [2021-01-06 10:29:35,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:35,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-01-06 10:29:35,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975375262] [2021-01-06 10:29:35,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:29:35,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:35,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:29:35,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:29:35,571 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand 47 states. [2021-01-06 10:29:37,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:37,167 INFO L93 Difference]: Finished difference Result 2156 states and 2549 transitions. [2021-01-06 10:29:37,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:29:37,168 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 173 [2021-01-06 10:29:37,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:37,176 INFO L225 Difference]: With dead ends: 2156 [2021-01-06 10:29:37,177 INFO L226 Difference]: Without dead ends: 2094 [2021-01-06 10:29:37,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:29:37,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-01-06 10:29:37,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 195. [2021-01-06 10:29:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-01-06 10:29:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2021-01-06 10:29:37,221 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 173 [2021-01-06 10:29:37,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:37,222 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2021-01-06 10:29:37,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:29:37,222 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2021-01-06 10:29:37,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-01-06 10:29:37,223 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:37,223 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 44, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:37,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:29:37,438 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:37,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1396027153, now seen corresponding path program 21 times [2021-01-06 10:29:37,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:37,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849662436] [2021-01-06 10:29:37,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:37,469 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:37,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669109329] [2021-01-06 10:29:37,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-06 10:29:38,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:29:38,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:38,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:29:38,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3565 backedges. 611 proven. 26 refuted. 0 times theorem prover too weak. 2928 trivial. 0 not checked. [2021-01-06 10:29:38,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849662436] [2021-01-06 10:29:38,424 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:38,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669109329] [2021-01-06 10:29:38,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:38,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:29:38,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778385880] [2021-01-06 10:29:38,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:29:38,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:38,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:29:38,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:38,427 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 9 states. [2021-01-06 10:29:38,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:38,664 INFO L93 Difference]: Finished difference Result 371 states and 418 transitions. [2021-01-06 10:29:38,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:29:38,665 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2021-01-06 10:29:38,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:38,668 INFO L225 Difference]: With dead ends: 371 [2021-01-06 10:29:38,668 INFO L226 Difference]: Without dead ends: 323 [2021-01-06 10:29:38,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:38,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-01-06 10:29:38,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 198. [2021-01-06 10:29:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-01-06 10:29:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2021-01-06 10:29:38,698 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 188 [2021-01-06 10:29:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:38,698 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2021-01-06 10:29:38,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:29:38,698 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2021-01-06 10:29:38,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-01-06 10:29:38,699 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:38,700 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 44, 8, 8, 8, 7, 7, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:38,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:29:38,905 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:38,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:38,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1306542921, now seen corresponding path program 22 times [2021-01-06 10:29:38,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:38,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806499951] [2021-01-06 10:29:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:38,935 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:38,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666254032] [2021-01-06 10:29:38,935 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 [2021-01-06 10:29:39,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:39,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:39,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 10:29:39,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 3493 proven. 84 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:29:41,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806499951] [2021-01-06 10:29:41,463 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:41,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666254032] [2021-01-06 10:29:41,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:41,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2021-01-06 10:29:41,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250239592] [2021-01-06 10:29:41,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 10:29:41,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:41,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 10:29:41,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=1437, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 10:29:41,466 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand 53 states. [2021-01-06 10:29:45,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:45,943 INFO L93 Difference]: Finished difference Result 2137 states and 2525 transitions. [2021-01-06 10:29:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 10:29:45,944 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 191 [2021-01-06 10:29:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:45,953 INFO L225 Difference]: With dead ends: 2137 [2021-01-06 10:29:45,954 INFO L226 Difference]: Without dead ends: 2089 [2021-01-06 10:29:45,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2197, Invalid=2495, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 10:29:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-01-06 10:29:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 201. [2021-01-06 10:29:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2021-01-06 10:29:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2021-01-06 10:29:46,004 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 191 [2021-01-06 10:29:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:46,005 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2021-01-06 10:29:46,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 10:29:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2021-01-06 10:29:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-01-06 10:29:46,006 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:46,006 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 44, 8, 8, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:46,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:29:46,221 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:46,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1638489071, now seen corresponding path program 23 times [2021-01-06 10:29:46,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:46,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638953883] [2021-01-06 10:29:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:46,253 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:46,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969139178] [2021-01-06 10:29:46,253 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