/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_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:28:23,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:28:23,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:28:23,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:28:23,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:28:23,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:28:23,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:28:23,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:28:23,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:28:23,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:28:23,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:28:23,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:28:23,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:28:23,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:28:23,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:28:23,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:28:23,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:28:23,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:28:23,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:28:23,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:28:23,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:28:23,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:28:23,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:28:23,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:28:23,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:28:23,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:28:23,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:28:23,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:28:23,423 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:28:23,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:28:23,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:28:23,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:28:23,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:28:23,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:28:23,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:28:23,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:28:23,434 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 10:28:23,478 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:28:23,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:28:23,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:28:23,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:28:23,484 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:28:23,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:28:23,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:28:23,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:28:23,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:28:23,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:28:23,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:28:23,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:28:23,486 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:28:23,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:28:23,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:28:23,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:28:23,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:28:23,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:28:23,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:28:23,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:28:23,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:28:23,488 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:28:23,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:28:23,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:28:23,488 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:28:23,489 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:28:23,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:28:23,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:28:23,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:28:23,995 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:28:23,996 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:28:23,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_1.c [2021-01-06 10:28:24,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d6aad2a95/d495da213e4d40b4b7c7741e5be2d84f/FLAGbd7a3b67b [2021-01-06 10:28:24,725 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:28:24,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_1.c [2021-01-06 10:28:24,735 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d6aad2a95/d495da213e4d40b4b7c7741e5be2d84f/FLAGbd7a3b67b [2021-01-06 10:28:24,752 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d6aad2a95/d495da213e4d40b4b7c7741e5be2d84f [2021-01-06 10:28:24,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:28:24,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:28:24,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:28:24,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:28:24,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:28:24,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:28:24" (1/1) ... [2021-01-06 10:28:24,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742cd900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:24, skipping insertion in model container [2021-01-06 10:28:24,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:28:24" (1/1) ... [2021-01-06 10:28:24,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:28:24,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:28:24,959 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_1.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 10:28:24,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:28:24,990 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:28:25,005 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_1.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 10:28:25,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:28:25,033 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:28:25,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:25 WrapperNode [2021-01-06 10:28:25,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:28:25,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:28:25,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:28:25,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:28:25,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:25" (1/1) ... [2021-01-06 10:28:25,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:25" (1/1) ... [2021-01-06 10:28:25,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:28:25,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:28:25,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:28:25,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:28:25,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:25" (1/1) ... [2021-01-06 10:28:25,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:25" (1/1) ... [2021-01-06 10:28:25,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:25" (1/1) ... [2021-01-06 10:28:25,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:25" (1/1) ... [2021-01-06 10:28:25,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:25" (1/1) ... [2021-01-06 10:28:25,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:25" (1/1) ... [2021-01-06 10:28:25,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:25" (1/1) ... [2021-01-06 10:28:25,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:28:25,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:28:25,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:28:25,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:28:25,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:25" (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 10:28:25,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:28:25,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:28:25,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:28:25,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:28:25,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:28:25,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:28:25,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:28:25,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:28:25,683 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 10:28:25,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:28:25 BoogieIcfgContainer [2021-01-06 10:28:25,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:28:25,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:28:25,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:28:25,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:28:25,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:28:24" (1/3) ... [2021-01-06 10:28:25,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae1337a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:28:25, skipping insertion in model container [2021-01-06 10:28:25,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:28:25" (2/3) ... [2021-01-06 10:28:25,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae1337a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:28:25, skipping insertion in model container [2021-01-06 10:28:25,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:28:25" (3/3) ... [2021-01-06 10:28:25,696 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_1.c [2021-01-06 10:28:25,704 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:28:25,711 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:28:25,739 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:28:25,810 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:28:25,810 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:28:25,811 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:28:25,811 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:28:25,811 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:28:25,811 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:28:25,811 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:28:25,811 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:28:25,864 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 10:28:25,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:28:25,879 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:25,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:25,881 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:25,899 INFO L82 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2021-01-06 10:28:25,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:25,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604274795] [2021-01-06 10:28:25,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:26,176 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 10:28:26,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604274795] [2021-01-06 10:28:26,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:28:26,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:28:26,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843832597] [2021-01-06 10:28:26,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:28:26,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:26,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:28:26,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:28:26,216 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2021-01-06 10:28:26,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:26,240 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-01-06 10:28:26,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:28:26,242 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 10:28:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:26,270 INFO L225 Difference]: With dead ends: 29 [2021-01-06 10:28:26,271 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 10:28:26,275 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 10:28:26,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 10:28:26,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 10:28:26,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 10:28:26,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-01-06 10:28:26,319 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2021-01-06 10:28:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:26,319 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-01-06 10:28:26,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:28:26,319 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-01-06 10:28:26,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:28:26,322 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:26,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:26,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:28:26,323 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:26,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:26,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2021-01-06 10:28:26,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:26,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804890638] [2021-01-06 10:28:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:26,477 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 10:28:26,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804890638] [2021-01-06 10:28:26,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:28:26,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:28:26,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999475786] [2021-01-06 10:28:26,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:28:26,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:26,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:28:26,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:28:26,485 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2021-01-06 10:28:26,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:26,589 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-01-06 10:28:26,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:28:26,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-01-06 10:28:26,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:26,592 INFO L225 Difference]: With dead ends: 34 [2021-01-06 10:28:26,592 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 10:28:26,594 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 10:28:26,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 10:28:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2021-01-06 10:28:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 10:28:26,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-01-06 10:28:26,607 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2021-01-06 10:28:26,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:26,608 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-01-06 10:28:26,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:28:26,608 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-01-06 10:28:26,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 10:28:26,610 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:26,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:26,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:28:26,613 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:26,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:26,614 INFO L82 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2021-01-06 10:28:26,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:26,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320377699] [2021-01-06 10:28:26,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:26,757 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 10:28:26,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320377699] [2021-01-06 10:28:26,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491887477] [2021-01-06 10:28:26,759 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 10:28:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:26,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:28:26,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:26,929 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 10:28:26,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:26,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 10:28:26,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116739041] [2021-01-06 10:28:26,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:28:26,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:26,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:28:26,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:28:26,932 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 7 states. [2021-01-06 10:28:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:27,018 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-01-06 10:28:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:28:27,022 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 10:28:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:27,026 INFO L225 Difference]: With dead ends: 44 [2021-01-06 10:28:27,027 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:28:27,028 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 10:28:27,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:28:27,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2021-01-06 10:28:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 10:28:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-01-06 10:28:27,043 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-01-06 10:28:27,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:27,043 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-01-06 10:28:27,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:28:27,044 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-01-06 10:28:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:28:27,045 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:27,045 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:27,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:28:27,262 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:27,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:27,264 INFO L82 PathProgramCache]: Analyzing trace with hash 982026547, now seen corresponding path program 2 times [2021-01-06 10:28:27,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:27,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137785492] [2021-01-06 10:28:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:27,337 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 10:28:27,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137785492] [2021-01-06 10:28:27,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003301594] [2021-01-06 10:28:27,338 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 10:28:27,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:28:27,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:27,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:28:27,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:27,502 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:27,517 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 10:28:27,532 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 10:28:27,563 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:28:27,580 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2021-01-06 10:28:27,599 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 10:28:27,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:27,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-01-06 10:28:27,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75018481] [2021-01-06 10:28:27,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:28:27,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:27,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:28:27,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:27,603 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2021-01-06 10:28:27,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:27,700 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-01-06 10:28:27,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:28:27,700 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-06 10:28:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:27,702 INFO L225 Difference]: With dead ends: 35 [2021-01-06 10:28:27,702 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:28:27,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:28:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:28:27,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-01-06 10:28:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:28:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-01-06 10:28:27,710 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2021-01-06 10:28:27,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:27,710 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-01-06 10:28:27,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:28:27,711 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-01-06 10:28:27,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 10:28:27,712 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:27,712 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:27,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:27,926 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:27,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:27,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1305492527, now seen corresponding path program 1 times [2021-01-06 10:28:27,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:27,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154363291] [2021-01-06 10:28:27,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:28,000 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 10:28:28,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154363291] [2021-01-06 10:28:28,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126889325] [2021-01-06 10:28:28,001 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 10:28:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:28,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:28:28,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:28,152 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 10:28:28,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:28,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 10:28:28,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134484910] [2021-01-06 10:28:28,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:28:28,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:28,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:28:28,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:28,156 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2021-01-06 10:28:28,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:28,242 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2021-01-06 10:28:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:28:28,243 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2021-01-06 10:28:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:28,244 INFO L225 Difference]: With dead ends: 93 [2021-01-06 10:28:28,244 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 10:28:28,245 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 10:28:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 10:28:28,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2021-01-06 10:28:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 10:28:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-01-06 10:28:28,253 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2021-01-06 10:28:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:28,254 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-01-06 10:28:28,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:28:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-01-06 10:28:28,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 10:28:28,255 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:28,255 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:28,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:28,471 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:28,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:28,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1739926453, now seen corresponding path program 2 times [2021-01-06 10:28:28,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:28,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272143488] [2021-01-06 10:28:28,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:28,619 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 10:28:28,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272143488] [2021-01-06 10:28:28,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458302522] [2021-01-06 10:28:28,620 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 10:28:28,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:28,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:28,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:28:28,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:28,794 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 10:28:28,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:28:28,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 10:28:28,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943140177] [2021-01-06 10:28:28,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:28:28,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:28,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:28:28,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:28,797 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 11 states. [2021-01-06 10:28:28,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:28,909 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2021-01-06 10:28:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:28:28,909 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2021-01-06 10:28:28,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:28,910 INFO L225 Difference]: With dead ends: 113 [2021-01-06 10:28:28,911 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 10:28:28,911 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 10:28:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 10:28:28,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 34. [2021-01-06 10:28:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:28:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-01-06 10:28:28,919 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2021-01-06 10:28:28,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:28,919 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-01-06 10:28:28,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:28:28,919 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-01-06 10:28:28,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:28:28,920 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:28,920 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:29,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:29,134 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:29,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:29,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1070414225, now seen corresponding path program 3 times [2021-01-06 10:28:29,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:29,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482714649] [2021-01-06 10:28:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:29,222 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 10:28:29,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482714649] [2021-01-06 10:28:29,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683957384] [2021-01-06 10:28:29,222 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 10:28:29,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:28:29,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:29,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:28:29,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:29,349 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 10:28:29,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:29,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-01-06 10:28:29,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509645114] [2021-01-06 10:28:29,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:28:29,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:29,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:28:29,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:28:29,352 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2021-01-06 10:28:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:29,413 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2021-01-06 10:28:29,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:28:29,414 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2021-01-06 10:28:29,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:29,415 INFO L225 Difference]: With dead ends: 79 [2021-01-06 10:28:29,415 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 10:28:29,416 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 10:28:29,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 10:28:29,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2021-01-06 10:28:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 10:28:29,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-01-06 10:28:29,422 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2021-01-06 10:28:29,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:29,423 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-01-06 10:28:29,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:28:29,423 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-01-06 10:28:29,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:28:29,424 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:29,424 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:29,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 10:28:29,639 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:29,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:29,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1120934345, now seen corresponding path program 1 times [2021-01-06 10:28:29,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:29,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240108160] [2021-01-06 10:28:29,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:29,657 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:29,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024848426] [2021-01-06 10:28:29,658 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 10:28:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:29,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:28:29,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:29,859 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 10:28:29,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240108160] [2021-01-06 10:28:29,860 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:29,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024848426] [2021-01-06 10:28:29,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:29,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:28:29,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712973522] [2021-01-06 10:28:29,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:28:29,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:29,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:28:29,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:29,863 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 9 states. [2021-01-06 10:28:29,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:29,988 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2021-01-06 10:28:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:28:29,988 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2021-01-06 10:28:29,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:29,990 INFO L225 Difference]: With dead ends: 157 [2021-01-06 10:28:29,990 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 10:28:29,991 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 10:28:29,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 10:28:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2021-01-06 10:28:29,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 10:28:29,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-01-06 10:28:29,999 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2021-01-06 10:28:29,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:30,000 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-01-06 10:28:30,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:28:30,000 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-01-06 10:28:30,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:28:30,001 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:30,001 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:30,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:30,216 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:30,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:30,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2107317257, now seen corresponding path program 2 times [2021-01-06 10:28:30,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:30,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164901760] [2021-01-06 10:28:30,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:30,234 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:30,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593977689] [2021-01-06 10:28:30,235 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 10:28:30,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:30,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:30,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:28:30,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:30,458 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 10:28:30,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164901760] [2021-01-06 10:28:30,459 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:30,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593977689] [2021-01-06 10:28:30,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:30,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:28:30,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151479345] [2021-01-06 10:28:30,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:28:30,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:30,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:28:30,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:30,462 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 11 states. [2021-01-06 10:28:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:30,618 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2021-01-06 10:28:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:28:30,619 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2021-01-06 10:28:30,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:30,621 INFO L225 Difference]: With dead ends: 197 [2021-01-06 10:28:30,621 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 10:28:30,622 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 10:28:30,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 10:28:30,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 48. [2021-01-06 10:28:30,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:28:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-01-06 10:28:30,631 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2021-01-06 10:28:30,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:30,631 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-01-06 10:28:30,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:28:30,631 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-01-06 10:28:30,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:28:30,633 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:30,633 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:30,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:30,847 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:30,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:30,848 INFO L82 PathProgramCache]: Analyzing trace with hash -975924809, now seen corresponding path program 3 times [2021-01-06 10:28:30,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:30,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657916153] [2021-01-06 10:28:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:30,862 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:30,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398867847] [2021-01-06 10:28:30,863 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 10:28:30,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:28:30,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:30,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:28:30,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:31,037 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 10:28:31,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657916153] [2021-01-06 10:28:31,038 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:31,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398867847] [2021-01-06 10:28:31,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:31,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:28:31,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930034140] [2021-01-06 10:28:31,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:28:31,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:31,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:28:31,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:28:31,041 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 7 states. [2021-01-06 10:28:31,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:31,142 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-01-06 10:28:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:28:31,143 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2021-01-06 10:28:31,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:31,144 INFO L225 Difference]: With dead ends: 60 [2021-01-06 10:28:31,144 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 10:28:31,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:31,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 10:28:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-01-06 10:28:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 10:28:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-01-06 10:28:31,152 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2021-01-06 10:28:31,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:31,152 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-01-06 10:28:31,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:28:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-01-06 10:28:31,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:28:31,154 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:31,154 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:31,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:28:31,370 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:31,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:31,371 INFO L82 PathProgramCache]: Analyzing trace with hash 2047403563, now seen corresponding path program 4 times [2021-01-06 10:28:31,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:31,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378600949] [2021-01-06 10:28:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:31,410 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:31,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559804217] [2021-01-06 10:28:31,411 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 10:28:31,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:28:31,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:31,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:28:31,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:31,724 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 10:28:31,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378600949] [2021-01-06 10:28:31,725 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:31,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559804217] [2021-01-06 10:28:31,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:31,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:28:31,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97321750] [2021-01-06 10:28:31,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:28:31,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:31,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:28:31,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:28:31,727 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 13 states. [2021-01-06 10:28:32,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:32,006 INFO L93 Difference]: Finished difference Result 211 states and 246 transitions. [2021-01-06 10:28:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:28:32,007 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2021-01-06 10:28:32,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:32,008 INFO L225 Difference]: With dead ends: 211 [2021-01-06 10:28:32,008 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 10:28:32,009 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 10:28:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 10:28:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 56. [2021-01-06 10:28:32,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:28:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-01-06 10:28:32,018 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 46 [2021-01-06 10:28:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:32,018 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-01-06 10:28:32,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:28:32,019 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-01-06 10:28:32,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:28:32,020 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:32,020 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:32,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:32,234 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:32,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:32,235 INFO L82 PathProgramCache]: Analyzing trace with hash -520854285, now seen corresponding path program 5 times [2021-01-06 10:28:32,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:32,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068719045] [2021-01-06 10:28:32,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:32,254 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:32,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081395451] [2021-01-06 10:28:32,255 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 10:28:32,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 10:28:32,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:32,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:28:32,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:32,818 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 10:28:32,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068719045] [2021-01-06 10:28:32,819 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:32,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081395451] [2021-01-06 10:28:32,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:32,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:28:32,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602888629] [2021-01-06 10:28:32,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:28:32,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:32,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:28:32,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:28:32,821 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 14 states. [2021-01-06 10:28:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:33,064 INFO L93 Difference]: Finished difference Result 314 states and 369 transitions. [2021-01-06 10:28:33,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:28:33,065 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2021-01-06 10:28:33,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:33,067 INFO L225 Difference]: With dead ends: 314 [2021-01-06 10:28:33,067 INFO L226 Difference]: Without dead ends: 283 [2021-01-06 10:28:33,068 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 10:28:33,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-01-06 10:28:33,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 65. [2021-01-06 10:28:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 10:28:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-01-06 10:28:33,079 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 49 [2021-01-06 10:28:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:33,079 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-01-06 10:28:33,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:28:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-01-06 10:28:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 10:28:33,080 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:33,081 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:33,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:33,290 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash -69913235, now seen corresponding path program 6 times [2021-01-06 10:28:33,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:33,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294787833] [2021-01-06 10:28:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:33,308 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:33,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166909863] [2021-01-06 10:28:33,309 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 10:28:33,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:28:33,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:33,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:28:33,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:33,571 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 10:28:33,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294787833] [2021-01-06 10:28:33,572 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:33,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166909863] [2021-01-06 10:28:33,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:33,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:28:33,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525621721] [2021-01-06 10:28:33,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:28:33,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:33,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:28:33,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:28:33,574 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 9 states. [2021-01-06 10:28:33,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:33,702 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-01-06 10:28:33,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:28:33,703 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2021-01-06 10:28:33,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:33,704 INFO L225 Difference]: With dead ends: 77 [2021-01-06 10:28:33,704 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:28:33,705 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 10:28:33,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:28:33,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-01-06 10:28:33,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 10:28:33,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-01-06 10:28:33,714 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2021-01-06 10:28:33,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:33,714 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-01-06 10:28:33,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:28:33,714 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-01-06 10:28:33,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:28:33,715 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:33,716 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:33,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:28:33,931 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:33,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:33,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1619534901, now seen corresponding path program 7 times [2021-01-06 10:28:33,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:33,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25788831] [2021-01-06 10:28:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:33,949 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:33,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909059891] [2021-01-06 10:28:33,949 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 10:28:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:34,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:28:34,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:34,372 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 10:28:34,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25788831] [2021-01-06 10:28:34,373 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:34,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909059891] [2021-01-06 10:28:34,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:34,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 10:28:34,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115223597] [2021-01-06 10:28:34,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:28:34,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:34,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:28:34,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:28:34,376 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 17 states. [2021-01-06 10:28:34,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:34,645 INFO L93 Difference]: Finished difference Result 450 states and 529 transitions. [2021-01-06 10:28:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:28:34,646 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2021-01-06 10:28:34,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:34,648 INFO L225 Difference]: With dead ends: 450 [2021-01-06 10:28:34,649 INFO L226 Difference]: Without dead ends: 414 [2021-01-06 10:28:34,650 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 10:28:34,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-01-06 10:28:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 79. [2021-01-06 10:28:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 10:28:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-01-06 10:28:34,662 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2021-01-06 10:28:34,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:34,663 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-01-06 10:28:34,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:28:34,663 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-01-06 10:28:34,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 10:28:34,664 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:34,664 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:34,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:28:34,878 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:34,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:34,878 INFO L82 PathProgramCache]: Analyzing trace with hash 206411567, now seen corresponding path program 8 times [2021-01-06 10:28:34,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:34,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586989291] [2021-01-06 10:28:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:34,905 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:34,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769791314] [2021-01-06 10:28:34,905 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 10:28:34,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:34,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:34,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:28:34,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:35,383 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 10:28:35,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586989291] [2021-01-06 10:28:35,384 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:35,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769791314] [2021-01-06 10:28:35,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:35,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-01-06 10:28:35,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279375944] [2021-01-06 10:28:35,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:28:35,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:35,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:28:35,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:28:35,394 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 20 states. [2021-01-06 10:28:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:35,740 INFO L93 Difference]: Finished difference Result 540 states and 634 transitions. [2021-01-06 10:28:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:28:35,741 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2021-01-06 10:28:35,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:35,744 INFO L225 Difference]: With dead ends: 540 [2021-01-06 10:28:35,744 INFO L226 Difference]: Without dead ends: 504 [2021-01-06 10:28:35,745 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 10:28:35,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-01-06 10:28:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 88. [2021-01-06 10:28:35,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 10:28:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-01-06 10:28:35,758 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 72 [2021-01-06 10:28:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:35,758 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-01-06 10:28:35,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:28:35,758 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-01-06 10:28:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 10:28:35,759 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:35,760 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:35,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:28:35,974 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:35,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:35,975 INFO L82 PathProgramCache]: Analyzing trace with hash 306240885, now seen corresponding path program 9 times [2021-01-06 10:28:35,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:35,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257237255] [2021-01-06 10:28:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:35,993 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:35,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283650345] [2021-01-06 10:28:35,994 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 10:28:36,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:28:36,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:36,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:28:36,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:36,269 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 10:28:36,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257237255] [2021-01-06 10:28:36,270 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:36,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283650345] [2021-01-06 10:28:36,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:36,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:28:36,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755141757] [2021-01-06 10:28:36,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:28:36,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:36,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:28:36,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:28:36,272 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 10 states. [2021-01-06 10:28:36,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:36,424 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2021-01-06 10:28:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:28:36,426 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2021-01-06 10:28:36,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:36,427 INFO L225 Difference]: With dead ends: 100 [2021-01-06 10:28:36,427 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 10:28:36,428 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 10:28:36,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 10:28:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-01-06 10:28:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 10:28:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2021-01-06 10:28:36,436 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 81 [2021-01-06 10:28:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:36,436 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2021-01-06 10:28:36,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:28:36,436 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2021-01-06 10:28:36,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:28:36,437 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:36,437 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:36,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:36,653 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:36,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1355563309, now seen corresponding path program 10 times [2021-01-06 10:28:36,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:36,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190007128] [2021-01-06 10:28:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:36,671 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:36,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318386627] [2021-01-06 10:28:36,672 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 10:28:36,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:28:36,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:36,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 10:28:36,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:37,218 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 10:28:37,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190007128] [2021-01-06 10:28:37,219 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:37,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318386627] [2021-01-06 10:28:37,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:37,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-01-06 10:28:37,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976142373] [2021-01-06 10:28:37,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:28:37,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:37,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:28:37,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:28:37,221 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 23 states. [2021-01-06 10:28:37,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:37,998 INFO L93 Difference]: Finished difference Result 580 states and 680 transitions. [2021-01-06 10:28:37,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:28:37,999 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2021-01-06 10:28:37,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:38,004 INFO L225 Difference]: With dead ends: 580 [2021-01-06 10:28:38,004 INFO L226 Difference]: Without dead ends: 547 [2021-01-06 10:28:38,005 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 10:28:38,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-01-06 10:28:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 96. [2021-01-06 10:28:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:28:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-01-06 10:28:38,017 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 86 [2021-01-06 10:28:38,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:38,018 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-01-06 10:28:38,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:28:38,018 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-01-06 10:28:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 10:28:38,019 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:38,019 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 17, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:38,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:28:38,235 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:38,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:38,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1036957617, now seen corresponding path program 11 times [2021-01-06 10:28:38,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:38,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593687673] [2021-01-06 10:28:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:38,254 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:38,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347067668] [2021-01-06 10:28:38,254 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 10:28:38,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-01-06 10:28:38,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:38,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 10:28:38,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:39,522 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 10:28:39,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593687673] [2021-01-06 10:28:39,522 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:39,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347067668] [2021-01-06 10:28:39,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:39,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-01-06 10:28:39,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728238151] [2021-01-06 10:28:39,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 10:28:39,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:39,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 10:28:39,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 10:28:39,525 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 24 states. [2021-01-06 10:28:40,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:40,008 INFO L93 Difference]: Finished difference Result 757 states and 892 transitions. [2021-01-06 10:28:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 10:28:40,009 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2021-01-06 10:28:40,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:40,013 INFO L225 Difference]: With dead ends: 757 [2021-01-06 10:28:40,013 INFO L226 Difference]: Without dead ends: 713 [2021-01-06 10:28:40,014 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 10:28:40,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-01-06 10:28:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 108. [2021-01-06 10:28:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 10:28:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2021-01-06 10:28:40,031 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 89 [2021-01-06 10:28:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:40,031 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2021-01-06 10:28:40,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 10:28:40,032 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2021-01-06 10:28:40,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:28:40,032 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:40,033 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:40,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:28:40,233 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:40,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:40,235 INFO L82 PathProgramCache]: Analyzing trace with hash -445045967, now seen corresponding path program 12 times [2021-01-06 10:28:40,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:40,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653690024] [2021-01-06 10:28:40,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:40,257 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:40,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067762015] [2021-01-06 10:28:40,258 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 10:28:40,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:28:40,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:40,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:28:40,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:40,705 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 10:28:40,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653690024] [2021-01-06 10:28:40,706 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:40,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067762015] [2021-01-06 10:28:40,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:40,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:28:40,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897314873] [2021-01-06 10:28:40,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:28:40,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:40,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:28:40,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:28:40,708 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand 11 states. [2021-01-06 10:28:40,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:40,900 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2021-01-06 10:28:40,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:28:40,900 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2021-01-06 10:28:40,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:40,903 INFO L225 Difference]: With dead ends: 120 [2021-01-06 10:28:40,903 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 10:28:40,903 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 10:28:40,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 10:28:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2021-01-06 10:28:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 10:28:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2021-01-06 10:28:40,916 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 101 [2021-01-06 10:28:40,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:40,916 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2021-01-06 10:28:40,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:28:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2021-01-06 10:28:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 10:28:40,917 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:40,917 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 21, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:41,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:41,131 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:41,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:41,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1077530383, now seen corresponding path program 13 times [2021-01-06 10:28:41,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:41,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460519435] [2021-01-06 10:28:41,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:41,160 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:41,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191728072] [2021-01-06 10:28:41,161 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 10:28:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:28:41,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:28:41,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:41,994 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 10:28:41,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460519435] [2021-01-06 10:28:41,995 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:41,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191728072] [2021-01-06 10:28:41,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:41,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-01-06 10:28:41,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553689730] [2021-01-06 10:28:41,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:28:41,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:41,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:28:41,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:28:41,997 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand 28 states. [2021-01-06 10:28:42,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:42,569 INFO L93 Difference]: Finished difference Result 1003 states and 1183 transitions. [2021-01-06 10:28:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:28:42,570 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2021-01-06 10:28:42,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:42,574 INFO L225 Difference]: With dead ends: 1003 [2021-01-06 10:28:42,574 INFO L226 Difference]: Without dead ends: 954 [2021-01-06 10:28:42,575 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 10:28:42,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-01-06 10:28:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 125. [2021-01-06 10:28:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 10:28:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2021-01-06 10:28:42,596 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 106 [2021-01-06 10:28:42,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:42,596 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2021-01-06 10:28:42,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:28:42,597 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2021-01-06 10:28:42,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 10:28:42,597 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:42,597 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:42,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:42,813 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:42,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:42,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1674589553, now seen corresponding path program 14 times [2021-01-06 10:28:42,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:42,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520765257] [2021-01-06 10:28:42,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:42,833 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:42,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824271939] [2021-01-06 10:28:42,834 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 10:28:42,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:28:42,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:42,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 10:28:42,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:43,915 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 10:28:43,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520765257] [2021-01-06 10:28:43,916 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:43,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824271939] [2021-01-06 10:28:43,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:43,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-01-06 10:28:43,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121183599] [2021-01-06 10:28:43,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:28:43,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:43,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:28:43,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:28:43,918 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand 32 states. [2021-01-06 10:28:44,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:44,676 INFO L93 Difference]: Finished difference Result 1163 states and 1371 transitions. [2021-01-06 10:28:44,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:28:44,677 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2021-01-06 10:28:44,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:44,683 INFO L225 Difference]: With dead ends: 1163 [2021-01-06 10:28:44,683 INFO L226 Difference]: Without dead ends: 1114 [2021-01-06 10:28:44,684 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 10:28:44,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-01-06 10:28:44,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 137. [2021-01-06 10:28:44,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 10:28:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2021-01-06 10:28:44,705 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 118 [2021-01-06 10:28:44,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:44,706 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2021-01-06 10:28:44,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:28:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2021-01-06 10:28:44,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 10:28:44,706 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:44,707 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:44,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:44,920 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:44,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:44,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1770554895, now seen corresponding path program 15 times [2021-01-06 10:28:44,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:44,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751716344] [2021-01-06 10:28:44,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:44,944 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:44,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527349230] [2021-01-06 10:28:44,944 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 10:28:45,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:28:45,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:45,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:28:45,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:45,565 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 10:28:45,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751716344] [2021-01-06 10:28:45,566 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:45,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527349230] [2021-01-06 10:28:45,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:45,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:28:45,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731938773] [2021-01-06 10:28:45,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:28:45,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:45,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:28:45,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:28:45,576 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand 12 states. [2021-01-06 10:28:45,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:45,795 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2021-01-06 10:28:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:28:45,796 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2021-01-06 10:28:45,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:45,798 INFO L225 Difference]: With dead ends: 149 [2021-01-06 10:28:45,798 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 10:28:45,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:28:45,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 10:28:45,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2021-01-06 10:28:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2021-01-06 10:28:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2021-01-06 10:28:45,814 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 130 [2021-01-06 10:28:45,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:45,814 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2021-01-06 10:28:45,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:28:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2021-01-06 10:28:45,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-01-06 10:28:45,815 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:45,815 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:46,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:28:46,030 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:46,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:46,030 INFO L82 PathProgramCache]: Analyzing trace with hash 99619377, now seen corresponding path program 16 times [2021-01-06 10:28:46,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:46,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187650284] [2021-01-06 10:28:46,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:46,052 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:46,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294134506] [2021-01-06 10:28:46,053 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 10:28:46,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:28:46,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:46,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:28:46,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:47,277 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 10:28:47,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187650284] [2021-01-06 10:28:47,278 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:47,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294134506] [2021-01-06 10:28:47,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:47,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-01-06 10:28:47,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655614849] [2021-01-06 10:28:47,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:28:47,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:47,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:28:47,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=665, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:28:47,280 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand 36 states. [2021-01-06 10:28:48,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:48,718 INFO L93 Difference]: Finished difference Result 1247 states and 1469 transitions. [2021-01-06 10:28:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:28:48,719 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 135 [2021-01-06 10:28:48,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:48,726 INFO L225 Difference]: With dead ends: 1247 [2021-01-06 10:28:48,726 INFO L226 Difference]: Without dead ends: 1204 [2021-01-06 10:28:48,727 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 10:28:48,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-01-06 10:28:48,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 145. [2021-01-06 10:28:48,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 10:28:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2021-01-06 10:28:48,751 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 135 [2021-01-06 10:28:48,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:48,751 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2021-01-06 10:28:48,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:28:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2021-01-06 10:28:48,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 10:28:48,752 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:48,753 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 29, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:48,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:28:48,966 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:48,966 INFO L82 PathProgramCache]: Analyzing trace with hash -274498259, now seen corresponding path program 17 times [2021-01-06 10:28:48,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:48,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472365702] [2021-01-06 10:28:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:48,991 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:48,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261014067] [2021-01-06 10:28:48,991 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 10:28:57,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-01-06 10:28:57,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:28:57,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 10:28:57,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:28:58,848 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 10:28:58,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472365702] [2021-01-06 10:28:58,849 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:28:58,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261014067] [2021-01-06 10:28:58,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:28:58,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-01-06 10:28:58,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826356058] [2021-01-06 10:28:58,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 10:28:58,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:28:58,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 10:28:58,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:28:58,851 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand 37 states. [2021-01-06 10:28:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:28:59,708 INFO L93 Difference]: Finished difference Result 1515 states and 1790 transitions. [2021-01-06 10:28:59,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 10:28:59,710 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2021-01-06 10:28:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:28:59,717 INFO L225 Difference]: With dead ends: 1515 [2021-01-06 10:28:59,717 INFO L226 Difference]: Without dead ends: 1458 [2021-01-06 10:28:59,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:28:59,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-01-06 10:28:59,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 160. [2021-01-06 10:28:59,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-01-06 10:28:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2021-01-06 10:28:59,747 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 138 [2021-01-06 10:28:59,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:28:59,747 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2021-01-06 10:28:59,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 10:28:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2021-01-06 10:28:59,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-01-06 10:28:59,748 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:28:59,749 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:28:59,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:28:59,962 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:28:59,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:28:59,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1459861581, now seen corresponding path program 18 times [2021-01-06 10:28:59,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:28:59,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630705871] [2021-01-06 10:28:59,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:28:59,987 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:28:59,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588823322] [2021-01-06 10:28:59,987 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 10:29:00,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:29:00,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:00,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 10:29:00,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:00,589 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 10:29:00,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630705871] [2021-01-06 10:29:00,590 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:00,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588823322] [2021-01-06 10:29:00,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:00,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:29:00,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490741197] [2021-01-06 10:29:00,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:29:00,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:00,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:29:00,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:29:00,591 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 13 states. [2021-01-06 10:29:00,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:00,854 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2021-01-06 10:29:00,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:29:00,855 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2021-01-06 10:29:00,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:00,856 INFO L225 Difference]: With dead ends: 172 [2021-01-06 10:29:00,856 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 10:29:00,856 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 10:29:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 10:29:00,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2021-01-06 10:29:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 10:29:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2021-01-06 10:29:00,877 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 153 [2021-01-06 10:29:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:00,878 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2021-01-06 10:29:00,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:29:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2021-01-06 10:29:00,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-01-06 10:29:00,879 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:00,879 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 34, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:01,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:29:01,095 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:01,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:01,097 INFO L82 PathProgramCache]: Analyzing trace with hash 40865199, now seen corresponding path program 19 times [2021-01-06 10:29:01,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:01,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013063706] [2021-01-06 10:29:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:01,122 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:01,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844758194] [2021-01-06 10:29:01,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:29:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:29:01,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 10:29:01,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:02,721 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 10:29:02,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013063706] [2021-01-06 10:29:02,722 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:02,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844758194] [2021-01-06 10:29:02,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:02,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-01-06 10:29:02,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781543058] [2021-01-06 10:29:02,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 10:29:02,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:02,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 10:29:02,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 10:29:02,725 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand 42 states. [2021-01-06 10:29:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:03,753 INFO L93 Difference]: Finished difference Result 1906 states and 2254 transitions. [2021-01-06 10:29:03,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 10:29:03,753 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2021-01-06 10:29:03,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:03,759 INFO L225 Difference]: With dead ends: 1906 [2021-01-06 10:29:03,759 INFO L226 Difference]: Without dead ends: 1844 [2021-01-06 10:29:03,760 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 10:29:03,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-01-06 10:29:03,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 180. [2021-01-06 10:29:03,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 10:29:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2021-01-06 10:29:03,792 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 158 [2021-01-06 10:29:03,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:03,792 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2021-01-06 10:29:03,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 10:29:03,792 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2021-01-06 10:29:03,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-01-06 10:29:03,793 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:03,794 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 39, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:04,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:29:04,008 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:04,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:04,008 INFO L82 PathProgramCache]: Analyzing trace with hash -376448715, now seen corresponding path program 20 times [2021-01-06 10:29:04,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:04,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652289962] [2021-01-06 10:29:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:04,031 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:04,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911572041] [2021-01-06 10:29:04,031 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 10:29:04,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:29:04,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:04,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 10:29:04,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:05,999 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 10:29:05,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652289962] [2021-01-06 10:29:05,999 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:05,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911572041] [2021-01-06 10:29:06,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:06,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-01-06 10:29:06,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167523035] [2021-01-06 10:29:06,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:29:06,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:06,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:29:06,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:29:06,002 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand 47 states. [2021-01-06 10:29:07,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:07,336 INFO L93 Difference]: Finished difference Result 2156 states and 2549 transitions. [2021-01-06 10:29:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:29:07,338 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 173 [2021-01-06 10:29:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:07,344 INFO L225 Difference]: With dead ends: 2156 [2021-01-06 10:29:07,345 INFO L226 Difference]: Without dead ends: 2094 [2021-01-06 10:29:07,346 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 10:29:07,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-01-06 10:29:07,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 195. [2021-01-06 10:29:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-01-06 10:29:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2021-01-06 10:29:07,385 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 173 [2021-01-06 10:29:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:07,385 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2021-01-06 10:29:07,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:29:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2021-01-06 10:29:07,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-01-06 10:29:07,387 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:07,387 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 44, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:07,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:29:07,603 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:07,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1396027153, now seen corresponding path program 21 times [2021-01-06 10:29:07,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:07,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608238667] [2021-01-06 10:29:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:07,632 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:07,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761607295] [2021-01-06 10:29:07,632 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 10:29:07,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:29:07,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:07,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:29:07,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:08,249 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 10:29:08,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608238667] [2021-01-06 10:29:08,249 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:08,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761607295] [2021-01-06 10:29:08,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:08,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:29:08,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184164881] [2021-01-06 10:29:08,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:29:08,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:08,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:29:08,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:29:08,251 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand 9 states. [2021-01-06 10:29:08,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:08,475 INFO L93 Difference]: Finished difference Result 371 states and 418 transitions. [2021-01-06 10:29:08,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:29:08,476 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2021-01-06 10:29:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:08,477 INFO L225 Difference]: With dead ends: 371 [2021-01-06 10:29:08,478 INFO L226 Difference]: Without dead ends: 323 [2021-01-06 10:29:08,478 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 10:29:08,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-01-06 10:29:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 198. [2021-01-06 10:29:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2021-01-06 10:29:08,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2021-01-06 10:29:08,506 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 188 [2021-01-06 10:29:08,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:08,506 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2021-01-06 10:29:08,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:29:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2021-01-06 10:29:08,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-01-06 10:29:08,507 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:08,508 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 44, 8, 8, 8, 7, 7, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:08,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:29:08,722 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:08,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:08,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1306542921, now seen corresponding path program 22 times [2021-01-06 10:29:08,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:08,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741239185] [2021-01-06 10:29:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:08,750 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:08,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278306152] [2021-01-06 10:29:08,751 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 10:29:08,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:29:08,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:29:08,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 10:29:08,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:29:11,107 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 10:29:11,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741239185] [2021-01-06 10:29:11,108 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:29:11,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278306152] [2021-01-06 10:29:11,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:29:11,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2021-01-06 10:29:11,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501262334] [2021-01-06 10:29:11,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 10:29:11,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:29:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 10:29:11,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=1437, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 10:29:11,110 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand 53 states. [2021-01-06 10:29:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:29:15,039 INFO L93 Difference]: Finished difference Result 2137 states and 2525 transitions. [2021-01-06 10:29:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 10:29:15,040 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 191 [2021-01-06 10:29:15,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:29:15,052 INFO L225 Difference]: With dead ends: 2137 [2021-01-06 10:29:15,052 INFO L226 Difference]: Without dead ends: 2089 [2021-01-06 10:29:15,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2197, Invalid=2495, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 10:29:15,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-01-06 10:29:15,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 201. [2021-01-06 10:29:15,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2021-01-06 10:29:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2021-01-06 10:29:15,097 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 191 [2021-01-06 10:29:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:29:15,098 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2021-01-06 10:29:15,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 10:29:15,098 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2021-01-06 10:29:15,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-01-06 10:29:15,099 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:29:15,099 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 44, 8, 8, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 10:29:15,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:29:15,314 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:29:15,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:29:15,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1638489071, now seen corresponding path program 23 times [2021-01-06 10:29:15,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:29:15,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422068774] [2021-01-06 10:29:15,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:29:15,340 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:29:15,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675003054] [2021-01-06 10:29:15,341 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