/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_limited_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:32:19,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:32:19,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:32:19,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:32:19,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:32:19,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:32:19,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:32:19,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:32:19,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:32:19,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:32:19,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:32:19,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:32:19,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:32:19,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:32:19,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:32:19,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:32:19,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:32:19,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:32:19,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:32:19,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:32:19,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:32:19,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:32:19,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:32:19,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:32:19,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:32:19,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:32:19,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:32:19,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:32:19,873 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 10:32:19,900 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:32:19,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:32:19,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:32:19,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:32:19,903 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:32:19,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:32:19,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:32:19,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:32:19,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:32:19,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:32:19,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:32:19,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:32:19,905 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:32:19,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:32:19,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:32:19,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:32:19,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:32:19,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:32:19,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:32:19,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:32:19,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:32:19,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:32:19,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:32:19,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:32:19,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:32:19,909 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:32:20,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:32:20,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:32:20,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:32:20,330 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:32:20,331 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:32:20,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_5.c [2021-01-06 10:32:20,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/012d7c74e/bee4bc3945f44f04871403903023a446/FLAG7617da54c [2021-01-06 10:32:21,136 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:32:21,137 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_5.c [2021-01-06 10:32:21,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/012d7c74e/bee4bc3945f44f04871403903023a446/FLAG7617da54c [2021-01-06 10:32:21,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/012d7c74e/bee4bc3945f44f04871403903023a446 [2021-01-06 10:32:21,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:32:21,514 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:32:21,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:32:21,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:32:21,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:32:21,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:32:21" (1/1) ... [2021-01-06 10:32:21,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bcb556e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:32:21, skipping insertion in model container [2021-01-06 10:32:21,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:32:21" (1/1) ... [2021-01-06 10:32:21,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:32:21,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:32:21,741 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_limited_5.c[331,344] 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 10:32:21,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:32:21,807 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:32:21,837 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_limited_5.c[331,344] 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 10:32:21,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:32:21,883 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:32:21,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:32:21 WrapperNode [2021-01-06 10:32:21,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:32:21,886 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:32:21,886 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:32:21,886 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:32:21,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:32:21" (1/1) ... [2021-01-06 10:32:21,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:32:21" (1/1) ... [2021-01-06 10:32:21,935 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:32:21,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:32:21,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:32:21,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:32:21,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:32:21" (1/1) ... [2021-01-06 10:32:21,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:32:21" (1/1) ... [2021-01-06 10:32:21,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:32:21" (1/1) ... [2021-01-06 10:32:21,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:32:21" (1/1) ... [2021-01-06 10:32:22,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:32:21" (1/1) ... [2021-01-06 10:32:22,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:32:21" (1/1) ... [2021-01-06 10:32:22,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:32:21" (1/1) ... [2021-01-06 10:32:22,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:32:22,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:32:22,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:32:22,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:32:22,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:32:21" (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 10:32:22,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:32:22,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:32:22,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:32:22,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:32:22,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:32:22,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:32:22,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:32:22,490 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:32:22,490 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 10:32:22,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:32:22 BoogieIcfgContainer [2021-01-06 10:32:22,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:32:22,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:32:22,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:32:22,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:32:22,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:32:21" (1/3) ... [2021-01-06 10:32:22,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1033d8e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:32:22, skipping insertion in model container [2021-01-06 10:32:22,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:32:21" (2/3) ... [2021-01-06 10:32:22,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1033d8e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:32:22, skipping insertion in model container [2021-01-06 10:32:22,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:32:22" (3/3) ... [2021-01-06 10:32:22,517 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_5.c [2021-01-06 10:32:22,535 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:32:22,546 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:32:22,574 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:32:22,623 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:32:22,626 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:32:22,626 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:32:22,626 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:32:22,626 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:32:22,627 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:32:22,627 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:32:22,627 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:32:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 10:32:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:32:22,661 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:22,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:22,663 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:22,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2021-01-06 10:32:22,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:22,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519651109] [2021-01-06 10:32:22,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:22,813 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:22,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839079192] [2021-01-06 10:32:22,815 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 10:32:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:32:22,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2021-01-06 10:32:22,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:22,951 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 10:32:22,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519651109] [2021-01-06 10:32:22,953 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:22,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839079192] [2021-01-06 10:32:22,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:32:22,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:32:22,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306738630] [2021-01-06 10:32:22,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:32:22,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:22,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:32:22,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:32:22,991 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 10:32:23,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:23,023 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2021-01-06 10:32:23,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:32:23,025 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 10:32:23,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:23,041 INFO L225 Difference]: With dead ends: 39 [2021-01-06 10:32:23,042 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 10:32:23,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 10:32:23,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 10:32:23,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 10:32:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 10:32:23,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-01-06 10:32:23,087 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2021-01-06 10:32:23,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:23,088 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-01-06 10:32:23,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:32:23,089 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-01-06 10:32:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:32:23,090 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:23,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:23,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-06 10:32:23,307 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:23,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:23,308 INFO L82 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2021-01-06 10:32:23,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:23,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424651853] [2021-01-06 10:32:23,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:23,321 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:23,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752196034] [2021-01-06 10:32:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:32:23,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:32:23,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:23,525 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 10:32:23,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424651853] [2021-01-06 10:32:23,526 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:23,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752196034] [2021-01-06 10:32:23,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:32:23,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:32:23,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076902646] [2021-01-06 10:32:23,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:32:23,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:23,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:32:23,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:32:23,531 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2021-01-06 10:32:23,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:23,618 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-01-06 10:32:23,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:32:23,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-06 10:32:23,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:23,620 INFO L225 Difference]: With dead ends: 42 [2021-01-06 10:32:23,620 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:32:23,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 10:32:23,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:32:23,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-01-06 10:32:23,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 10:32:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-01-06 10:32:23,628 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2021-01-06 10:32:23,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:23,628 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-01-06 10:32:23,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:32:23,628 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-01-06 10:32:23,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:32:23,629 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:23,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:23,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:23,846 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:23,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:23,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2021-01-06 10:32:23,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:23,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582040099] [2021-01-06 10:32:23,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:23,866 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:23,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272123466] [2021-01-06 10:32:23,867 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 10:32:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:32:23,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:32:23,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:23,974 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 10:32:23,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582040099] [2021-01-06 10:32:23,974 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:23,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272123466] [2021-01-06 10:32:23,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:23,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 10:32:23,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940700840] [2021-01-06 10:32:23,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:32:23,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:23,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:32:23,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:32:23,977 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2021-01-06 10:32:24,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:24,050 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-01-06 10:32:24,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:32:24,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-01-06 10:32:24,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:24,052 INFO L225 Difference]: With dead ends: 54 [2021-01-06 10:32:24,052 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 10:32:24,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:32:24,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 10:32:24,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2021-01-06 10:32:24,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:32:24,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-01-06 10:32:24,059 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2021-01-06 10:32:24,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:24,059 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-01-06 10:32:24,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:32:24,060 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-01-06 10:32:24,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:32:24,060 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:24,061 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:24,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:24,276 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:24,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:24,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2118808138, now seen corresponding path program 2 times [2021-01-06 10:32:24,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:24,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336697229] [2021-01-06 10:32:24,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:24,289 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:24,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026334664] [2021-01-06 10:32:24,290 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 10:32:24,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:32:24,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:24,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:32:24,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:32:24,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336697229] [2021-01-06 10:32:24,508 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:24,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026334664] [2021-01-06 10:32:24,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:32:24,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:32:24,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976302727] [2021-01-06 10:32:24,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:32:24,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:24,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:32:24,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:32:24,511 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2021-01-06 10:32:24,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:24,680 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-01-06 10:32:24,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:32:24,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 10:32:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:24,682 INFO L225 Difference]: With dead ends: 35 [2021-01-06 10:32:24,683 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:32:24,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:32:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:32:24,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-01-06 10:32:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 10:32:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-01-06 10:32:24,691 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2021-01-06 10:32:24,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:24,691 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-01-06 10:32:24,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:32:24,692 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-01-06 10:32:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:32:24,693 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:24,693 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:24,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:24,897 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:24,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:24,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2118867720, now seen corresponding path program 1 times [2021-01-06 10:32:24,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:24,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763719812] [2021-01-06 10:32:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:24,913 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:24,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803132027] [2021-01-06 10:32:24,914 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 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 10:32:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:32:24,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:32:24,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:32:25,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763719812] [2021-01-06 10:32:25,127 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:25,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803132027] [2021-01-06 10:32:25,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:25,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:32:25,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152045322] [2021-01-06 10:32:25,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:32:25,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:25,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:32:25,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:32:25,132 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2021-01-06 10:32:25,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:25,251 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2021-01-06 10:32:25,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:32:25,252 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-01-06 10:32:25,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:25,255 INFO L225 Difference]: With dead ends: 89 [2021-01-06 10:32:25,255 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 10:32:25,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:32:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 10:32:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 34. [2021-01-06 10:32:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:32:25,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-01-06 10:32:25,265 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2021-01-06 10:32:25,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:25,265 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-01-06 10:32:25,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:32:25,266 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-01-06 10:32:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:32:25,267 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:25,267 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:25,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:25,481 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:25,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:25,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1636705269, now seen corresponding path program 2 times [2021-01-06 10:32:25,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:25,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293751523] [2021-01-06 10:32:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:25,494 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:25,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036448341] [2021-01-06 10:32:25,495 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 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 10:32:25,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:32:25,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:25,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:32:25,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 10:32:25,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293751523] [2021-01-06 10:32:25,774 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:25,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036448341] [2021-01-06 10:32:25,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:32:25,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 10:32:25,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097266630] [2021-01-06 10:32:25,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:32:25,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:25,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:32:25,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:32:25,777 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 7 states. [2021-01-06 10:32:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:25,916 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-01-06 10:32:25,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:32:25,919 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-01-06 10:32:25,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:25,920 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:32:25,920 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 10:32:25,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:32:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 10:32:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2021-01-06 10:32:25,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 10:32:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-01-06 10:32:25,929 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2021-01-06 10:32:25,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:25,930 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-01-06 10:32:25,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:32:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-01-06 10:32:25,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:32:25,931 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:25,931 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:26,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:26,146 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:26,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:26,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1380764901, now seen corresponding path program 1 times [2021-01-06 10:32:26,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:26,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008128549] [2021-01-06 10:32:26,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:26,159 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:26,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744181543] [2021-01-06 10:32:26,160 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 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 10:32:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:32:26,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:32:26,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:32:26,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008128549] [2021-01-06 10:32:26,362 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:26,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744181543] [2021-01-06 10:32:26,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:26,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:32:26,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073236643] [2021-01-06 10:32:26,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:32:26,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:26,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:32:26,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:32:26,365 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 7 states. [2021-01-06 10:32:26,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:26,490 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2021-01-06 10:32:26,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:32:26,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2021-01-06 10:32:26,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:26,492 INFO L225 Difference]: With dead ends: 127 [2021-01-06 10:32:26,492 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:32:26,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:32:26,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:32:26,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 44. [2021-01-06 10:32:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 10:32:26,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-01-06 10:32:26,501 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 31 [2021-01-06 10:32:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:26,501 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-01-06 10:32:26,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:32:26,501 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-01-06 10:32:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 10:32:26,502 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:26,503 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:26,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:26,711 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:26,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:26,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1775597512, now seen corresponding path program 2 times [2021-01-06 10:32:26,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:26,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277703468] [2021-01-06 10:32:26,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:26,732 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:26,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075225168] [2021-01-06 10:32:26,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:26,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:32:26,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:26,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:32:26,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:32:27,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277703468] [2021-01-06 10:32:27,099 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:27,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075225168] [2021-01-06 10:32:27,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:27,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:32:27,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118936896] [2021-01-06 10:32:27,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:32:27,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:27,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:32:27,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:32:27,104 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2021-01-06 10:32:27,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:27,253 INFO L93 Difference]: Finished difference Result 149 states and 180 transitions. [2021-01-06 10:32:27,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:32:27,254 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2021-01-06 10:32:27,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:27,255 INFO L225 Difference]: With dead ends: 149 [2021-01-06 10:32:27,255 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 10:32:27,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:32:27,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 10:32:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 49. [2021-01-06 10:32:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 10:32:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-01-06 10:32:27,264 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 36 [2021-01-06 10:32:27,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:27,265 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-01-06 10:32:27,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:32:27,265 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-01-06 10:32:27,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:32:27,266 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:27,266 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:27,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-06 10:32:27,482 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:27,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:27,483 INFO L82 PathProgramCache]: Analyzing trace with hash -599004987, now seen corresponding path program 3 times [2021-01-06 10:32:27,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:27,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996265117] [2021-01-06 10:32:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:27,494 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:27,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122992249] [2021-01-06 10:32:27,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:27,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:32:27,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:27,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:32:27,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 10:32:27,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996265117] [2021-01-06 10:32:27,793 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:27,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122992249] [2021-01-06 10:32:27,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:27,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:32:27,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841359564] [2021-01-06 10:32:27,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:32:27,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:27,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:32:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:32:27,795 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 7 states. [2021-01-06 10:32:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:27,961 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-01-06 10:32:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:32:27,962 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2021-01-06 10:32:27,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:27,963 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:32:27,963 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 10:32:27,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:32:27,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 10:32:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2021-01-06 10:32:27,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:32:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-01-06 10:32:27,971 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 41 [2021-01-06 10:32:27,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:27,972 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-01-06 10:32:27,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:32:27,972 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-01-06 10:32:27,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:32:27,973 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:27,973 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:28,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:28,179 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:28,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:28,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1681892459, now seen corresponding path program 4 times [2021-01-06 10:32:28,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:28,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245788489] [2021-01-06 10:32:28,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:28,204 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:28,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509751298] [2021-01-06 10:32:28,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:28,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:32:28,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:28,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:32:28,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:28,351 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-01-06 10:32:28,353 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:32:28,359 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:32:28,360 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:32:28,361 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:32:28,386 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-01-06 10:32:28,388 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:32:28,391 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:32:28,391 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:32:28,392 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-01-06 10:32:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-01-06 10:32:28,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245788489] [2021-01-06 10:32:28,423 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:28,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509751298] [2021-01-06 10:32:28,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:28,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:32:28,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489178235] [2021-01-06 10:32:28,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:32:28,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:28,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:32:28,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:32:28,425 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 6 states. [2021-01-06 10:32:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:28,501 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2021-01-06 10:32:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:32:28,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-01-06 10:32:28,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:28,503 INFO L225 Difference]: With dead ends: 116 [2021-01-06 10:32:28,503 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:32:28,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:32:28,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:32:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-01-06 10:32:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:32:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-01-06 10:32:28,511 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 46 [2021-01-06 10:32:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:28,512 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-01-06 10:32:28,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:32:28,512 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-01-06 10:32:28,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:32:28,513 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:28,513 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:28,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:28,728 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:28,729 INFO L82 PathProgramCache]: Analyzing trace with hash -562090839, now seen corresponding path program 1 times [2021-01-06 10:32:28,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:28,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881319427] [2021-01-06 10:32:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:28,740 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:28,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855349759] [2021-01-06 10:32:28,741 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 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 10:32:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:32:28,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:32:28,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:32:29,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881319427] [2021-01-06 10:32:29,019 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:29,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855349759] [2021-01-06 10:32:29,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:29,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:32:29,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635219224] [2021-01-06 10:32:29,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:32:29,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:29,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:32:29,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:32:29,030 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 9 states. [2021-01-06 10:32:29,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:29,185 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2021-01-06 10:32:29,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:32:29,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2021-01-06 10:32:29,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:29,188 INFO L225 Difference]: With dead ends: 197 [2021-01-06 10:32:29,188 INFO L226 Difference]: Without dead ends: 169 [2021-01-06 10:32:29,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 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 10:32:29,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-01-06 10:32:29,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 59. [2021-01-06 10:32:29,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 10:32:29,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-01-06 10:32:29,215 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 46 [2021-01-06 10:32:29,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:29,215 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-01-06 10:32:29,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:32:29,215 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-01-06 10:32:29,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:32:29,216 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:29,217 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:29,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 10:32:29,432 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:29,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:29,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1943967942, now seen corresponding path program 2 times [2021-01-06 10:32:29,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:29,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476094724] [2021-01-06 10:32:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:29,444 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:29,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486964005] [2021-01-06 10:32:29,445 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 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 10:32:29,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:32:29,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:29,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:32:29,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:32:29,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476094724] [2021-01-06 10:32:29,745 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:29,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486964005] [2021-01-06 10:32:29,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:29,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:32:29,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595059753] [2021-01-06 10:32:29,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:32:29,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:29,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:32:29,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:32:29,748 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 10 states. [2021-01-06 10:32:29,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:29,933 INFO L93 Difference]: Finished difference Result 224 states and 268 transitions. [2021-01-06 10:32:29,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:32:29,934 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2021-01-06 10:32:29,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:29,936 INFO L225 Difference]: With dead ends: 224 [2021-01-06 10:32:29,936 INFO L226 Difference]: Without dead ends: 196 [2021-01-06 10:32:29,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:32:29,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-01-06 10:32:29,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 64. [2021-01-06 10:32:29,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 10:32:29,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2021-01-06 10:32:29,954 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 51 [2021-01-06 10:32:29,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:29,956 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2021-01-06 10:32:29,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:32:29,956 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2021-01-06 10:32:29,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:32:29,959 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:29,959 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:30,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:30,174 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:30,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:30,175 INFO L82 PathProgramCache]: Analyzing trace with hash 71442249, now seen corresponding path program 3 times [2021-01-06 10:32:30,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:30,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358412156] [2021-01-06 10:32:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:30,185 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:30,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293545270] [2021-01-06 10:32:30,185 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 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 10:32:30,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:32:30,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:30,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:32:30,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:30,429 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-01-06 10:32:30,430 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:32:30,436 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:32:30,437 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:32:30,437 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:32:30,458 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-01-06 10:32:30,460 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:32:30,465 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:32:30,465 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:32:30,466 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2021-01-06 10:32:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-01-06 10:32:30,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358412156] [2021-01-06 10:32:30,529 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:30,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293545270] [2021-01-06 10:32:30,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:32:30,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 10:32:30,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879635518] [2021-01-06 10:32:30,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:32:30,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:30,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:32:30,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:32:30,531 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 7 states. [2021-01-06 10:32:30,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:30,664 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2021-01-06 10:32:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:32:30,665 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2021-01-06 10:32:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:30,666 INFO L225 Difference]: With dead ends: 136 [2021-01-06 10:32:30,666 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:32:30,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:32:30,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:32:30,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2021-01-06 10:32:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:32:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-01-06 10:32:30,674 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 56 [2021-01-06 10:32:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:30,675 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-01-06 10:32:30,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:32:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-01-06 10:32:30,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:32:30,676 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:30,676 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:30,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:32:30,881 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:30,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:30,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1617501493, now seen corresponding path program 4 times [2021-01-06 10:32:30,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:30,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292094549] [2021-01-06 10:32:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:30,890 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:30,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118835452] [2021-01-06 10:32:30,891 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 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 10:32:30,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:32:30,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:30,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:32:30,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:30,972 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-01-06 10:32:30,973 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:32:30,978 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:32:30,979 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:32:30,980 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:32:30,997 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-06 10:32:30,998 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:32:31,000 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:32:31,001 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:32:31,001 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2021-01-06 10:32:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:32:31,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292094549] [2021-01-06 10:32:31,036 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:31,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118835452] [2021-01-06 10:32:31,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:32:31,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 10:32:31,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902032536] [2021-01-06 10:32:31,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:32:31,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:31,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:32:31,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:32:31,038 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 5 states. [2021-01-06 10:32:31,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:31,090 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2021-01-06 10:32:31,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:32:31,091 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2021-01-06 10:32:31,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:31,092 INFO L225 Difference]: With dead ends: 132 [2021-01-06 10:32:31,092 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 10:32:31,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:32:31,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 10:32:31,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-01-06 10:32:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 10:32:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2021-01-06 10:32:31,098 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 56 [2021-01-06 10:32:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:31,099 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2021-01-06 10:32:31,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:32:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2021-01-06 10:32:31,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:32:31,100 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:31,100 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:31,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:31,315 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:31,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:31,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1633020211, now seen corresponding path program 5 times [2021-01-06 10:32:31,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:31,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362427935] [2021-01-06 10:32:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:31,324 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:31,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698415573] [2021-01-06 10:32:31,325 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 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 10:32:31,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 10:32:31,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:31,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:32:31,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:31,386 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-01-06 10:32:31,387 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:32:31,390 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:32:31,390 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:32:31,391 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2021-01-06 10:32:31,485 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:32:31,485 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 71 [2021-01-06 10:32:31,490 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:32:31,540 INFO L625 ElimStorePlain]: treesize reduction 30, result has 55.2 percent of original size [2021-01-06 10:32:31,545 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 10:32:31,545 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:37 [2021-01-06 10:32:31,602 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:32:31,603 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2021-01-06 10:32:31,607 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:32:31,620 INFO L625 ElimStorePlain]: treesize reduction 12, result has 57.1 percent of original size [2021-01-06 10:32:31,622 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:32:31,622 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:3 [2021-01-06 10:32:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-01-06 10:32:31,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362427935] [2021-01-06 10:32:31,657 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:31,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698415573] [2021-01-06 10:32:31,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:31,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:32:31,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647792446] [2021-01-06 10:32:31,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:32:31,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:31,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:32:31,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:32:31,660 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 8 states. [2021-01-06 10:32:31,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:31,811 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2021-01-06 10:32:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:32:31,812 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2021-01-06 10:32:31,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:31,813 INFO L225 Difference]: With dead ends: 140 [2021-01-06 10:32:31,813 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 10:32:31,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:32:31,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 10:32:31,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2021-01-06 10:32:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 10:32:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-01-06 10:32:31,822 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 56 [2021-01-06 10:32:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:31,822 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-01-06 10:32:31,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:32:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-01-06 10:32:31,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:32:31,823 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:31,823 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:32,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:32:32,038 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:32,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1670153675, now seen corresponding path program 6 times [2021-01-06 10:32:32,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:32,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920897300] [2021-01-06 10:32:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:32,049 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:32,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023244170] [2021-01-06 10:32:32,052 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 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 10:32:32,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:32:32,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:32,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:32:32,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-01-06 10:32:32,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920897300] [2021-01-06 10:32:32,392 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:32,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023244170] [2021-01-06 10:32:32,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:32,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:32:32,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537461998] [2021-01-06 10:32:32,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:32:32,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:32,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:32:32,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:32:32,397 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 8 states. [2021-01-06 10:32:32,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:32,621 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2021-01-06 10:32:32,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:32:32,622 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2021-01-06 10:32:32,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:32,623 INFO L225 Difference]: With dead ends: 103 [2021-01-06 10:32:32,623 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 10:32:32,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:32:32,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 10:32:32,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2021-01-06 10:32:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:32:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2021-01-06 10:32:32,633 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 56 [2021-01-06 10:32:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:32,634 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2021-01-06 10:32:32,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:32:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2021-01-06 10:32:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 10:32:32,635 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:32,635 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:32,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:32:32,843 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:32,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1477851941, now seen corresponding path program 7 times [2021-01-06 10:32:32,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:32,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421020821] [2021-01-06 10:32:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:32,852 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:32,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924919816] [2021-01-06 10:32:32,852 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 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 10:32:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:32:32,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:32:32,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:32:33,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421020821] [2021-01-06 10:32:33,107 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:33,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924919816] [2021-01-06 10:32:33,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:33,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:32:33,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548620870] [2021-01-06 10:32:33,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:32:33,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:33,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:32:33,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:32:33,119 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand 11 states. [2021-01-06 10:32:33,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:33,337 INFO L93 Difference]: Finished difference Result 336 states and 400 transitions. [2021-01-06 10:32:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:32:33,338 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2021-01-06 10:32:33,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:33,340 INFO L225 Difference]: With dead ends: 336 [2021-01-06 10:32:33,341 INFO L226 Difference]: Without dead ends: 291 [2021-01-06 10:32:33,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 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 10:32:33,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-01-06 10:32:33,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 106. [2021-01-06 10:32:33,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 10:32:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2021-01-06 10:32:33,354 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 61 [2021-01-06 10:32:33,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:33,356 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2021-01-06 10:32:33,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:32:33,356 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2021-01-06 10:32:33,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 10:32:33,357 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:33,357 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:33,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:32:33,571 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:33,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:33,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1255875722, now seen corresponding path program 8 times [2021-01-06 10:32:33,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:33,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909202659] [2021-01-06 10:32:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:33,581 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:33,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154023875] [2021-01-06 10:32:33,581 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 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 10:32:33,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:32:33,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:33,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:32:33,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 10:32:33,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909202659] [2021-01-06 10:32:33,986 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:33,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154023875] [2021-01-06 10:32:33,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:33,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:32:33,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888254796] [2021-01-06 10:32:33,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:32:33,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:33,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:32:33,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:32:33,993 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand 12 states. [2021-01-06 10:32:34,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:34,205 INFO L93 Difference]: Finished difference Result 373 states and 443 transitions. [2021-01-06 10:32:34,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:32:34,205 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2021-01-06 10:32:34,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:34,207 INFO L225 Difference]: With dead ends: 373 [2021-01-06 10:32:34,208 INFO L226 Difference]: Without dead ends: 328 [2021-01-06 10:32:34,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:32:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-01-06 10:32:34,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 116. [2021-01-06 10:32:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 10:32:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2021-01-06 10:32:34,226 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 66 [2021-01-06 10:32:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:34,226 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2021-01-06 10:32:34,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:32:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2021-01-06 10:32:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 10:32:34,227 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:34,227 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:34,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:32:34,432 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:34,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:34,433 INFO L82 PathProgramCache]: Analyzing trace with hash -495794747, now seen corresponding path program 9 times [2021-01-06 10:32:34,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:34,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90552062] [2021-01-06 10:32:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:34,441 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:34,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734334891] [2021-01-06 10:32:34,442 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 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 10:32:34,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:32:34,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:34,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:32:34,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-01-06 10:32:34,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90552062] [2021-01-06 10:32:34,806 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:34,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734334891] [2021-01-06 10:32:34,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:34,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:32:34,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532994004] [2021-01-06 10:32:34,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:32:34,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:34,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:32:34,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:32:34,809 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 9 states. [2021-01-06 10:32:35,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:35,094 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-01-06 10:32:35,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:32:35,095 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2021-01-06 10:32:35,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:35,096 INFO L225 Difference]: With dead ends: 128 [2021-01-06 10:32:35,096 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 10:32:35,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:32:35,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 10:32:35,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2021-01-06 10:32:35,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-06 10:32:35,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2021-01-06 10:32:35,111 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 71 [2021-01-06 10:32:35,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:35,111 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2021-01-06 10:32:35,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:32:35,112 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2021-01-06 10:32:35,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 10:32:35,112 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:35,113 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:35,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:35,327 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:35,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:35,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1692067691, now seen corresponding path program 10 times [2021-01-06 10:32:35,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:35,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849138890] [2021-01-06 10:32:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:35,342 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:35,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784557441] [2021-01-06 10:32:35,342 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 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 10:32:35,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:32:35,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:35,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:32:35,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:35,448 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-01-06 10:32:35,449 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:32:35,454 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:32:35,455 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:32:35,455 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2021-01-06 10:32:35,479 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-01-06 10:32:35,480 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:32:35,484 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:32:35,486 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:32:35,486 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:3 [2021-01-06 10:32:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:32:35,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849138890] [2021-01-06 10:32:35,528 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:35,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784557441] [2021-01-06 10:32:35,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:35,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:32:35,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134538816] [2021-01-06 10:32:35,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:32:35,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:35,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:32:35,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:32:35,529 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 7 states. [2021-01-06 10:32:35,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:35,647 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2021-01-06 10:32:35,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:32:35,648 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2021-01-06 10:32:35,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:35,648 INFO L225 Difference]: With dead ends: 176 [2021-01-06 10:32:35,649 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:32:35,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:32:35,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:32:35,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2021-01-06 10:32:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 10:32:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2021-01-06 10:32:35,656 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 76 [2021-01-06 10:32:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:35,656 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2021-01-06 10:32:35,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:32:35,656 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2021-01-06 10:32:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 10:32:35,657 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:35,657 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:35,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:35,872 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:35,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:35,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2042199827, now seen corresponding path program 1 times [2021-01-06 10:32:35,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:35,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339183696] [2021-01-06 10:32:35,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:35,880 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:35,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816369063] [2021-01-06 10:32:35,880 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 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 10:32:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:32:35,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:32:35,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:32:36,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339183696] [2021-01-06 10:32:36,192 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:36,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816369063] [2021-01-06 10:32:36,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:36,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:32:36,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030702578] [2021-01-06 10:32:36,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:32:36,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:36,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:32:36,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:32:36,195 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 13 states. [2021-01-06 10:32:36,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:36,444 INFO L93 Difference]: Finished difference Result 386 states and 451 transitions. [2021-01-06 10:32:36,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:32:36,445 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2021-01-06 10:32:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:36,447 INFO L225 Difference]: With dead ends: 386 [2021-01-06 10:32:36,447 INFO L226 Difference]: Without dead ends: 346 [2021-01-06 10:32:36,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:32:36,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-01-06 10:32:36,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 91. [2021-01-06 10:32:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 10:32:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-01-06 10:32:36,457 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 76 [2021-01-06 10:32:36,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:36,457 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-01-06 10:32:36,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:32:36,457 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-01-06 10:32:36,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 10:32:36,458 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:36,458 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:36,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:32:36,668 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:36,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:36,669 INFO L82 PathProgramCache]: Analyzing trace with hash 279020216, now seen corresponding path program 2 times [2021-01-06 10:32:36,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:36,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050980249] [2021-01-06 10:32:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:36,682 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:36,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480313887] [2021-01-06 10:32:36,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:36,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:32:36,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:36,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:32:36,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:32:37,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050980249] [2021-01-06 10:32:37,087 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:32:37,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480313887] [2021-01-06 10:32:37,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:32:37,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:32:37,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178735572] [2021-01-06 10:32:37,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:32:37,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:32:37,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:32:37,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:32:37,090 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 14 states. [2021-01-06 10:32:37,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:32:37,334 INFO L93 Difference]: Finished difference Result 423 states and 494 transitions. [2021-01-06 10:32:37,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:32:37,336 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2021-01-06 10:32:37,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:32:37,338 INFO L225 Difference]: With dead ends: 423 [2021-01-06 10:32:37,338 INFO L226 Difference]: Without dead ends: 383 [2021-01-06 10:32:37,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 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 10:32:37,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-01-06 10:32:37,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 96. [2021-01-06 10:32:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:32:37,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-01-06 10:32:37,349 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 81 [2021-01-06 10:32:37,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:32:37,350 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-01-06 10:32:37,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:32:37,350 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-01-06 10:32:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 10:32:37,351 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:32:37,351 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:32:37,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:37,565 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:32:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:32:37,566 INFO L82 PathProgramCache]: Analyzing trace with hash -697899059, now seen corresponding path program 3 times [2021-01-06 10:32:37,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:32:37,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420926669] [2021-01-06 10:32:37,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:32:37,574 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:32:37,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565288765] [2021-01-06 10:32:37,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:32:37,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:32:37,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:32:37,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:32:37,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:32:53,956 WARN L197 SmtUtils]: Spent 16.22 s on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 10:32:56,011 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 18 [2021-01-06 10:32:56,332 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:32:56,341 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:32:56,354 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:32:56,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:32:58,425 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 17 [2021-01-06 10:33:00,511 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 19 [2021-01-06 10:33:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-01-06 10:33:00,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420926669] [2021-01-06 10:33:00,601 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:00,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565288765] [2021-01-06 10:33:00,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:00,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:33:00,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713501090] [2021-01-06 10:33:00,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:33:00,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:00,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:33:00,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:33:00,603 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 7 states. [2021-01-06 10:33:08,931 WARN L197 SmtUtils]: Spent 8.28 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-01-06 10:33:17,439 WARN L197 SmtUtils]: Spent 8.48 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-01-06 10:33:29,890 WARN L197 SmtUtils]: Spent 12.34 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-01-06 10:33:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:32,372 INFO L93 Difference]: Finished difference Result 197 states and 227 transitions. [2021-01-06 10:33:32,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:33:32,376 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2021-01-06 10:33:32,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:32,378 INFO L225 Difference]: With dead ends: 197 [2021-01-06 10:33:32,378 INFO L226 Difference]: Without dead ends: 164 [2021-01-06 10:33:32,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.5s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:33:32,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-01-06 10:33:32,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 105. [2021-01-06 10:33:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 10:33:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2021-01-06 10:33:32,392 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 86 [2021-01-06 10:33:32,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:32,393 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2021-01-06 10:33:32,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:33:32,393 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2021-01-06 10:33:32,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 10:33:32,394 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:32,403 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:32,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:33:32,607 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:32,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:32,608 INFO L82 PathProgramCache]: Analyzing trace with hash -459469228, now seen corresponding path program 1 times [2021-01-06 10:33:32,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:32,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487415065] [2021-01-06 10:33:32,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:32,615 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:32,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586351849] [2021-01-06 10:33:32,616 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 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 10:33:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:32,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:33:32,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:33:33,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487415065] [2021-01-06 10:33:33,156 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:33,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586351849] [2021-01-06 10:33:33,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:33,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 10:33:33,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162120180] [2021-01-06 10:33:33,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:33:33,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:33,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:33:33,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:33:33,158 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 16 states. [2021-01-06 10:33:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:33,670 INFO L93 Difference]: Finished difference Result 515 states and 604 transitions. [2021-01-06 10:33:33,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:33:33,672 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2021-01-06 10:33:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:33,674 INFO L225 Difference]: With dead ends: 515 [2021-01-06 10:33:33,675 INFO L226 Difference]: Without dead ends: 466 [2021-01-06 10:33:33,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:33:33,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-01-06 10:33:33,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 115. [2021-01-06 10:33:33,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 10:33:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2021-01-06 10:33:33,690 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 91 [2021-01-06 10:33:33,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:33,690 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2021-01-06 10:33:33,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:33:33,690 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2021-01-06 10:33:33,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:33:33,691 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:33,691 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:33,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:33,905 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:33,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:33,906 INFO L82 PathProgramCache]: Analyzing trace with hash -830076044, now seen corresponding path program 2 times [2021-01-06 10:33:33,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:33,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617077619] [2021-01-06 10:33:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:33,915 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:33,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983222037] [2021-01-06 10:33:33,916 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 10:33:34,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:33:34,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:34,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:33:34,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:33:34,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617077619] [2021-01-06 10:33:34,623 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:34,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983222037] [2021-01-06 10:33:34,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:34,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-01-06 10:33:34,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454681006] [2021-01-06 10:33:34,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:33:34,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:34,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:33:34,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:33:34,625 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand 18 states. [2021-01-06 10:33:35,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:35,159 INFO L93 Difference]: Finished difference Result 589 states and 690 transitions. [2021-01-06 10:33:35,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:33:35,160 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2021-01-06 10:33:35,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:35,164 INFO L225 Difference]: With dead ends: 589 [2021-01-06 10:33:35,164 INFO L226 Difference]: Without dead ends: 540 [2021-01-06 10:33:35,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:33:35,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-01-06 10:33:35,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 125. [2021-01-06 10:33:35,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 10:33:35,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2021-01-06 10:33:35,182 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 101 [2021-01-06 10:33:35,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:35,183 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2021-01-06 10:33:35,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:33:35,183 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2021-01-06 10:33:35,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 10:33:35,184 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:35,184 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:35,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:33:35,397 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:35,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:35,398 INFO L82 PathProgramCache]: Analyzing trace with hash 397222036, now seen corresponding path program 3 times [2021-01-06 10:33:35,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:35,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435830323] [2021-01-06 10:33:35,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:35,412 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:35,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758187961] [2021-01-06 10:33:35,412 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 10:33:35,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:33:35,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:35,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:33:35,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:35,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-01-06 10:33:35,809 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:33:35,843 INFO L625 ElimStorePlain]: treesize reduction 9, result has 75.7 percent of original size [2021-01-06 10:33:35,852 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-01-06 10:33:35,852 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:33:35,873 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:33:35,874 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:33:35,874 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:24 [2021-01-06 10:33:35,914 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-01-06 10:33:35,916 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:33:35,933 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:33:35,947 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:33:35,948 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:16 [2021-01-06 10:33:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2021-01-06 10:33:38,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435830323] [2021-01-06 10:33:38,530 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:38,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758187961] [2021-01-06 10:33:38,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:38,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:33:38,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595042824] [2021-01-06 10:33:38,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:33:38,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:38,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:33:38,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2021-01-06 10:33:38,532 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand 9 states. [2021-01-06 10:33:50,454 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-01-06 10:33:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:52,919 INFO L93 Difference]: Finished difference Result 193 states and 218 transitions. [2021-01-06 10:33:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:33:52,920 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 111 [2021-01-06 10:33:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:52,921 INFO L225 Difference]: With dead ends: 193 [2021-01-06 10:33:52,921 INFO L226 Difference]: Without dead ends: 160 [2021-01-06 10:33:52,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=84, Invalid=153, Unknown=3, NotChecked=0, Total=240 [2021-01-06 10:33:52,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-01-06 10:33:52,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 134. [2021-01-06 10:33:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 10:33:52,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 148 transitions. [2021-01-06 10:33:52,935 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 148 transitions. Word has length 111 [2021-01-06 10:33:52,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:52,936 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 148 transitions. [2021-01-06 10:33:52,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:33:52,936 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 148 transitions. [2021-01-06 10:33:52,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 10:33:52,937 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:52,937 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:53,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:33:53,152 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:53,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:53,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1783425430, now seen corresponding path program 1 times [2021-01-06 10:33:53,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:53,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575505162] [2021-01-06 10:33:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:53,163 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:53,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048471528] [2021-01-06 10:33:53,163 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 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 10:33:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:33:53,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:33:53,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:33:53,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575505162] [2021-01-06 10:33:53,902 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:53,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048471528] [2021-01-06 10:33:53,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:53,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-01-06 10:33:53,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463123640] [2021-01-06 10:33:53,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:33:53,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:53,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:33:53,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:33:53,904 INFO L87 Difference]: Start difference. First operand 134 states and 148 transitions. Second operand 20 states. [2021-01-06 10:33:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:54,512 INFO L93 Difference]: Finished difference Result 681 states and 798 transitions. [2021-01-06 10:33:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:33:54,513 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 111 [2021-01-06 10:33:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:54,517 INFO L225 Difference]: With dead ends: 681 [2021-01-06 10:33:54,518 INFO L226 Difference]: Without dead ends: 623 [2021-01-06 10:33:54,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:33:54,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-01-06 10:33:54,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 144. [2021-01-06 10:33:54,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-01-06 10:33:54,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2021-01-06 10:33:54,538 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 111 [2021-01-06 10:33:54,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:54,538 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2021-01-06 10:33:54,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:33:54,538 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2021-01-06 10:33:54,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-01-06 10:33:54,540 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:54,540 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:54,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:33:54,755 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:54,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:54,756 INFO L82 PathProgramCache]: Analyzing trace with hash 234100406, now seen corresponding path program 2 times [2021-01-06 10:33:54,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:54,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987619284] [2021-01-06 10:33:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:54,766 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:54,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333696644] [2021-01-06 10:33:54,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-01-06 10:33:54,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:33:54,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:54,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:33:54,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:33:55,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987619284] [2021-01-06 10:33:55,679 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:55,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333696644] [2021-01-06 10:33:55,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:55,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-01-06 10:33:55,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378233774] [2021-01-06 10:33:55,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:33:55,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:55,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:33:55,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:33:55,683 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand 22 states. [2021-01-06 10:33:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:56,351 INFO L93 Difference]: Finished difference Result 755 states and 884 transitions. [2021-01-06 10:33:56,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:33:56,352 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2021-01-06 10:33:56,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:56,356 INFO L225 Difference]: With dead ends: 755 [2021-01-06 10:33:56,356 INFO L226 Difference]: Without dead ends: 697 [2021-01-06 10:33:56,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:33:56,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-01-06 10:33:56,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 154. [2021-01-06 10:33:56,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 10:33:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 168 transitions. [2021-01-06 10:33:56,375 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 168 transitions. Word has length 121 [2021-01-06 10:33:56,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:56,375 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 168 transitions. [2021-01-06 10:33:56,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:33:56,376 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 168 transitions. [2021-01-06 10:33:56,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-01-06 10:33:56,377 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:56,377 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:56,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:33:56,582 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:56,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:56,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1558010838, now seen corresponding path program 3 times [2021-01-06 10:33:56,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:56,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389984356] [2021-01-06 10:33:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:56,590 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:56,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282802230] [2021-01-06 10:33:56,591 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:56,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:33:56,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:56,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:33:56,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:56,897 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:33:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 165 proven. 4 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-01-06 10:33:57,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389984356] [2021-01-06 10:33:57,020 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:57,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282802230] [2021-01-06 10:33:57,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:57,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:33:57,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145397358] [2021-01-06 10:33:57,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:33:57,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:57,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:33:57,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:33:57,022 INFO L87 Difference]: Start difference. First operand 154 states and 168 transitions. Second operand 7 states. [2021-01-06 10:33:57,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:57,278 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2021-01-06 10:33:57,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:33:57,280 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2021-01-06 10:33:57,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:57,281 INFO L225 Difference]: With dead ends: 247 [2021-01-06 10:33:57,281 INFO L226 Difference]: Without dead ends: 214 [2021-01-06 10:33:57,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:33:57,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-01-06 10:33:57,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2021-01-06 10:33:57,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 10:33:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 182 transitions. [2021-01-06 10:33:57,298 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 182 transitions. Word has length 131 [2021-01-06 10:33:57,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:57,298 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 182 transitions. [2021-01-06 10:33:57,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:33:57,298 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 182 transitions. [2021-01-06 10:33:57,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 10:33:57,300 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:57,300 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 19, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:57,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:33:57,504 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:57,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:57,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1275756781, now seen corresponding path program 4 times [2021-01-06 10:33:57,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:57,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939674821] [2021-01-06 10:33:57,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:57,513 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:57,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007359400] [2021-01-06 10:33:57,514 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:57,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:33:57,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:33:57,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 10:33:57,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:33:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:33:58,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939674821] [2021-01-06 10:33:58,723 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:33:58,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007359400] [2021-01-06 10:33:58,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:33:58,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-01-06 10:33:58,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342444719] [2021-01-06 10:33:58,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 10:33:58,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:33:58,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 10:33:58,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:33:58,725 INFO L87 Difference]: Start difference. First operand 164 states and 182 transitions. Second operand 25 states. [2021-01-06 10:33:59,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:33:59,580 INFO L93 Difference]: Finished difference Result 886 states and 1042 transitions. [2021-01-06 10:33:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:33:59,581 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 136 [2021-01-06 10:33:59,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:33:59,585 INFO L225 Difference]: With dead ends: 886 [2021-01-06 10:33:59,585 INFO L226 Difference]: Without dead ends: 818 [2021-01-06 10:33:59,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 10:33:59,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-01-06 10:33:59,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 179. [2021-01-06 10:33:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 10:33:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 197 transitions. [2021-01-06 10:33:59,609 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 197 transitions. Word has length 136 [2021-01-06 10:33:59,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:33:59,609 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 197 transitions. [2021-01-06 10:33:59,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 10:33:59,609 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 197 transitions. [2021-01-06 10:33:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-01-06 10:33:59,610 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:33:59,611 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 22, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:33:59,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:33:59,824 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:33:59,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:33:59,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1031815848, now seen corresponding path program 5 times [2021-01-06 10:33:59,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:33:59,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189347433] [2021-01-06 10:33:59,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:33:59,833 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:33:59,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823208262] [2021-01-06 10:33:59,834 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:01,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-01-06 10:34:01,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:01,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:34:01,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1450 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:34:02,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189347433] [2021-01-06 10:34:02,418 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:34:02,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823208262] [2021-01-06 10:34:02,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:34:02,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-01-06 10:34:02,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834268900] [2021-01-06 10:34:02,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:34:02,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:02,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:34:02,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:34:02,421 INFO L87 Difference]: Start difference. First operand 179 states and 197 transitions. Second operand 28 states. [2021-01-06 10:34:03,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:03,344 INFO L93 Difference]: Finished difference Result 997 states and 1171 transitions. [2021-01-06 10:34:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:34:03,345 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2021-01-06 10:34:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:03,350 INFO L225 Difference]: With dead ends: 997 [2021-01-06 10:34:03,350 INFO L226 Difference]: Without dead ends: 929 [2021-01-06 10:34:03,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:34:03,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-01-06 10:34:03,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 194. [2021-01-06 10:34:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2021-01-06 10:34:03,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 212 transitions. [2021-01-06 10:34:03,372 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 212 transitions. Word has length 151 [2021-01-06 10:34:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:03,372 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 212 transitions. [2021-01-06 10:34:03,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:34:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 212 transitions. [2021-01-06 10:34:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 10:34:03,374 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:03,374 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 25, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:03,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:03,582 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:03,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:03,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1801633165, now seen corresponding path program 6 times [2021-01-06 10:34:03,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:03,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541313630] [2021-01-06 10:34:03,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:03,604 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:34:03,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220006085] [2021-01-06 10:34:03,604 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:03,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:34:03,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:03,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:34:03,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:04,131 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:34:04,162 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:34:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 341 proven. 13 refuted. 0 times theorem prover too weak. 1474 trivial. 0 not checked. [2021-01-06 10:34:04,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541313630] [2021-01-06 10:34:04,309 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:34:04,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220006085] [2021-01-06 10:34:04,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:34:04,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:34:04,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106222632] [2021-01-06 10:34:04,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:34:04,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:04,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:34:04,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:34:04,311 INFO L87 Difference]: Start difference. First operand 194 states and 212 transitions. Second operand 8 states. [2021-01-06 10:34:04,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:04,681 INFO L93 Difference]: Finished difference Result 312 states and 357 transitions. [2021-01-06 10:34:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:34:04,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 166 [2021-01-06 10:34:04,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:04,685 INFO L225 Difference]: With dead ends: 312 [2021-01-06 10:34:04,685 INFO L226 Difference]: Without dead ends: 279 [2021-01-06 10:34:04,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:34:04,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-01-06 10:34:04,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 204. [2021-01-06 10:34:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2021-01-06 10:34:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 226 transitions. [2021-01-06 10:34:04,710 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 226 transitions. Word has length 166 [2021-01-06 10:34:04,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:04,710 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 226 transitions. [2021-01-06 10:34:04,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:34:04,711 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 226 transitions. [2021-01-06 10:34:04,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-01-06 10:34:04,711 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:04,712 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 25, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:04,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 10:34:04,917 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:04,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:04,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1258378476, now seen corresponding path program 4 times [2021-01-06 10:34:04,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:04,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072471262] [2021-01-06 10:34:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:04,926 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:34:04,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813171026] [2021-01-06 10:34:04,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:05,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:34:05,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:05,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 10:34:05,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:34:07,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072471262] [2021-01-06 10:34:07,005 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:34:07,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813171026] [2021-01-06 10:34:07,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:34:07,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-01-06 10:34:07,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978672098] [2021-01-06 10:34:07,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:34:07,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:07,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:34:07,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:34:07,007 INFO L87 Difference]: Start difference. First operand 204 states and 226 transitions. Second operand 32 states. [2021-01-06 10:34:08,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:08,089 INFO L93 Difference]: Finished difference Result 1165 states and 1372 transitions. [2021-01-06 10:34:08,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:34:08,091 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 171 [2021-01-06 10:34:08,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:08,095 INFO L225 Difference]: With dead ends: 1165 [2021-01-06 10:34:08,096 INFO L226 Difference]: Without dead ends: 1087 [2021-01-06 10:34:08,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:34:08,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-01-06 10:34:08,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 224. [2021-01-06 10:34:08,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2021-01-06 10:34:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 246 transitions. [2021-01-06 10:34:08,123 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 246 transitions. Word has length 171 [2021-01-06 10:34:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:08,124 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 246 transitions. [2021-01-06 10:34:08,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:34:08,124 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 246 transitions. [2021-01-06 10:34:08,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-01-06 10:34:08,125 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:08,125 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 29, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:08,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:08,339 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:08,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:08,340 INFO L82 PathProgramCache]: Analyzing trace with hash -294634156, now seen corresponding path program 5 times [2021-01-06 10:34:08,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:08,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190053155] [2021-01-06 10:34:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:08,347 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:34:08,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134296405] [2021-01-06 10:34:08,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:15,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2021-01-06 10:34:15,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:15,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 10:34:15,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2558 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-01-06 10:34:17,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190053155] [2021-01-06 10:34:17,409 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:34:17,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134296405] [2021-01-06 10:34:17,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:34:17,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-01-06 10:34:17,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965658046] [2021-01-06 10:34:17,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:34:17,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:17,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:34:17,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:34:17,414 INFO L87 Difference]: Start difference. First operand 224 states and 246 transitions. Second operand 36 states. [2021-01-06 10:34:19,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:19,169 INFO L93 Difference]: Finished difference Result 1313 states and 1544 transitions. [2021-01-06 10:34:19,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 10:34:19,170 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 191 [2021-01-06 10:34:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:19,175 INFO L225 Difference]: With dead ends: 1313 [2021-01-06 10:34:19,176 INFO L226 Difference]: Without dead ends: 1235 [2021-01-06 10:34:19,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:34:19,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-01-06 10:34:19,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 244. [2021-01-06 10:34:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2021-01-06 10:34:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 266 transitions. [2021-01-06 10:34:19,207 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 266 transitions. Word has length 191 [2021-01-06 10:34:19,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:19,207 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 266 transitions. [2021-01-06 10:34:19,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:34:19,207 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 266 transitions. [2021-01-06 10:34:19,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-01-06 10:34:19,209 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:19,209 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 33, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:19,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 10:34:19,423 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:19,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:19,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1738682260, now seen corresponding path program 6 times [2021-01-06 10:34:19,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:19,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991535246] [2021-01-06 10:34:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:19,432 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:34:19,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208169649] [2021-01-06 10:34:19,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:20,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:34:20,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:20,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:34:20,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3232 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3186 trivial. 0 not checked. [2021-01-06 10:34:20,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991535246] [2021-01-06 10:34:20,713 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:34:20,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208169649] [2021-01-06 10:34:20,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:34:20,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:34:20,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534067896] [2021-01-06 10:34:20,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:34:20,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:20,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:34:20,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:34:20,715 INFO L87 Difference]: Start difference. First operand 244 states and 266 transitions. Second operand 10 states. [2021-01-06 10:34:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:21,317 INFO L93 Difference]: Finished difference Result 256 states and 280 transitions. [2021-01-06 10:34:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:34:21,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 211 [2021-01-06 10:34:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:21,319 INFO L225 Difference]: With dead ends: 256 [2021-01-06 10:34:21,319 INFO L226 Difference]: Without dead ends: 254 [2021-01-06 10:34:21,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:34:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-01-06 10:34:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 249. [2021-01-06 10:34:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2021-01-06 10:34:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 272 transitions. [2021-01-06 10:34:21,344 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 272 transitions. Word has length 211 [2021-01-06 10:34:21,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:21,345 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 272 transitions. [2021-01-06 10:34:21,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:34:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 272 transitions. [2021-01-06 10:34:21,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-01-06 10:34:21,346 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:21,346 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 33, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:21,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:21,552 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:21,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1394624252, now seen corresponding path program 7 times [2021-01-06 10:34:21,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:21,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886875989] [2021-01-06 10:34:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:21,562 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:34:21,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510387756] [2021-01-06 10:34:21,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:34:21,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:34:21,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:34:23,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886875989] [2021-01-06 10:34:23,821 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:34:23,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510387756] [2021-01-06 10:34:23,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:34:23,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-01-06 10:34:23,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267294084] [2021-01-06 10:34:23,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:34:23,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:23,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:34:23,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:34:23,824 INFO L87 Difference]: Start difference. First operand 249 states and 272 transitions. Second operand 40 states. [2021-01-06 10:34:25,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:25,613 INFO L93 Difference]: Finished difference Result 1627 states and 1915 transitions. [2021-01-06 10:34:25,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:34:25,615 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 216 [2021-01-06 10:34:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:25,622 INFO L225 Difference]: With dead ends: 1627 [2021-01-06 10:34:25,622 INFO L226 Difference]: Without dead ends: 1544 [2021-01-06 10:34:25,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:34:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-01-06 10:34:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 269. [2021-01-06 10:34:25,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2021-01-06 10:34:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 292 transitions. [2021-01-06 10:34:25,662 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 292 transitions. Word has length 216 [2021-01-06 10:34:25,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:25,663 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 292 transitions. [2021-01-06 10:34:25,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:34:25,663 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 292 transitions. [2021-01-06 10:34:25,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-01-06 10:34:25,665 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:25,665 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 37, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:25,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 10:34:25,881 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:25,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:25,882 INFO L82 PathProgramCache]: Analyzing trace with hash -906535748, now seen corresponding path program 8 times [2021-01-06 10:34:25,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:25,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191820406] [2021-01-06 10:34:25,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:25,891 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:34:25,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838924846] [2021-01-06 10:34:25,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:26,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:34:26,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:26,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 10:34:26,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4010 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:34:28,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191820406] [2021-01-06 10:34:28,630 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:34:28,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838924846] [2021-01-06 10:34:28,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:34:28,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-01-06 10:34:28,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790526188] [2021-01-06 10:34:28,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 10:34:28,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:28,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 10:34:28,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:34:28,633 INFO L87 Difference]: Start difference. First operand 269 states and 292 transitions. Second operand 44 states. [2021-01-06 10:34:30,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:34:30,641 INFO L93 Difference]: Finished difference Result 1795 states and 2111 transitions. [2021-01-06 10:34:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 10:34:30,644 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 236 [2021-01-06 10:34:30,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:34:30,651 INFO L225 Difference]: With dead ends: 1795 [2021-01-06 10:34:30,651 INFO L226 Difference]: Without dead ends: 1712 [2021-01-06 10:34:30,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:34:30,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-01-06 10:34:30,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 289. [2021-01-06 10:34:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2021-01-06 10:34:30,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 312 transitions. [2021-01-06 10:34:30,689 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 312 transitions. Word has length 236 [2021-01-06 10:34:30,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:34:30,690 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 312 transitions. [2021-01-06 10:34:30,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 10:34:30,690 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 312 transitions. [2021-01-06 10:34:30,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-01-06 10:34:30,691 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:34:30,692 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 41, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:34:30,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:34:30,897 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:34:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:34:30,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1848251004, now seen corresponding path program 9 times [2021-01-06 10:34:30,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:34:30,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888132899] [2021-01-06 10:34:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:34:30,909 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:34:30,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066513943] [2021-01-06 10:34:30,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:34:31,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:34:31,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:34:31,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:34:31,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:34:31,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-01-06 10:34:31,609 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:34:31,632 INFO L625 ElimStorePlain]: treesize reduction 9, result has 73.5 percent of original size [2021-01-06 10:34:31,636 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-01-06 10:34:31,637 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:34:31,648 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:34:31,650 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:34:31,650 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-01-06 10:34:31,681 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-01-06 10:34:31,682 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:34:31,692 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:34:31,693 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:34:31,694 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-01-06 10:34:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4844 backedges. 0 proven. 591 refuted. 1 times theorem prover too weak. 4252 trivial. 0 not checked. [2021-01-06 10:34:47,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888132899] [2021-01-06 10:34:47,641 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:34:47,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066513943] [2021-01-06 10:34:47,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:34:47,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:34:47,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086560084] [2021-01-06 10:34:47,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:34:47,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:34:47,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:34:47,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=76, Unknown=6, NotChecked=0, Total=110 [2021-01-06 10:34:47,643 INFO L87 Difference]: Start difference. First operand 289 states and 312 transitions. Second operand 11 states. [2021-01-06 10:35:26,234 WARN L197 SmtUtils]: Spent 4.48 s on a formula simplification that was a NOOP. DAG size: 28 [2021-01-06 10:35:35,394 WARN L197 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 30 [2021-01-06 10:35:52,114 WARN L197 SmtUtils]: Spent 4.66 s on a formula simplification that was a NOOP. DAG size: 29 [2021-01-06 10:35:56,999 WARN L197 SmtUtils]: Spent 4.56 s on a formula simplification that was a NOOP. DAG size: 31 [2021-01-06 10:36:08,016 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod (mod (mod c_ULTIMATE.start_main_~i~0 4294967296) 5) 4294967296))) (and (= c_~N~0 1000) (= .cse0 0) (= .cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0.base|) (+ |c_ULTIMATE.start_main_~#a~0.offset| (* c_ULTIMATE.start_main_~i~0 4)))) (= c_ULTIMATE.start_main_~R~0 5) (< c_ULTIMATE.start_main_~i~0 c_~N~0) (= (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967294) 4294967296) 5) 4294967296) 0))) is different from false [2021-01-06 10:36:12,451 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 5) 4294967296) 0) (= c_~N~0 1000) (= (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967293) 4294967296) 5) 4294967296) 0) (< c_ULTIMATE.start_main_~i~0 (+ c_~N~0 1)) (= c_ULTIMATE.start_main_~R~0 5)) is different from false [2021-01-06 10:36:17,895 WARN L197 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 31 [2021-01-06 10:36:27,106 WARN L197 SmtUtils]: Spent 6.78 s on a formula simplification that was a NOOP. DAG size: 33 [2021-01-06 10:36:38,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:36:38,854 INFO L93 Difference]: Finished difference Result 363 states and 406 transitions. [2021-01-06 10:36:38,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:36:38,855 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 256 [2021-01-06 10:36:38,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:36:38,857 INFO L225 Difference]: With dead ends: 363 [2021-01-06 10:36:38,857 INFO L226 Difference]: Without dead ends: 325 [2021-01-06 10:36:38,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 75.6s TimeCoverageRelationStatistics Valid=141, Invalid=446, Unknown=21, NotChecked=94, Total=702 [2021-01-06 10:36:38,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-01-06 10:36:38,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 299. [2021-01-06 10:36:38,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2021-01-06 10:36:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 325 transitions. [2021-01-06 10:36:38,890 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 325 transitions. Word has length 256 [2021-01-06 10:36:38,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:36:38,890 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 325 transitions. [2021-01-06 10:36:38,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:36:38,890 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 325 transitions. [2021-01-06 10:36:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-01-06 10:36:38,892 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:36:38,892 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 41, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:36:39,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:36:39,097 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:36:39,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:36:39,098 INFO L82 PathProgramCache]: Analyzing trace with hash -201136838, now seen corresponding path program 7 times [2021-01-06 10:36:39,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:36:39,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749278746] [2021-01-06 10:36:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:36:39,107 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:36:39,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691922309] [2021-01-06 10:36:39,107 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:36:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:36:39,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 10:36:39,273 INFO L286 TraceCheckSpWp]: Computing forward predicates...