/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/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:52:39,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:52:39,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:52:39,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:52:39,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:52:39,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:52:39,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:52:39,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:52:39,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:52:39,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:52:39,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:52:39,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:52:39,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:52:39,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:52:39,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:52:39,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:52:39,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:52:39,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:52:39,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:52:39,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:52:39,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:52:39,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:52:39,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:52:39,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:52:39,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:52:39,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:52:39,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:52:39,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:52:39,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:52:39,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:52:39,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:52:39,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:52:39,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:52:39,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:52:39,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:52:39,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:52:39,722 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:52:39,750 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:52:39,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:52:39,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:52:39,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:52:39,753 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:52:39,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:52:39,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:52:39,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:52:39,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:52:39,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:52:39,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:52:39,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:52:39,755 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:52:39,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:52:39,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:52:39,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:52:39,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:52:39,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:52:39,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:52:39,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:52:39,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:52:39,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:52:39,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:52:39,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:52:39,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:52:39,759 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:52:40,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:52:40,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:52:40,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:52:40,215 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:52:40,215 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:52:40,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2020-12-23 06:52:40,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ff9a0f8e7/d69f9f95293041f9a52853aea8d83745/FLAG8dc6d6120 [2020-12-23 06:52:40,918 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:52:40,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2020-12-23 06:52:40,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ff9a0f8e7/d69f9f95293041f9a52853aea8d83745/FLAG8dc6d6120 [2020-12-23 06:52:41,283 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ff9a0f8e7/d69f9f95293041f9a52853aea8d83745 [2020-12-23 06:52:41,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:52:41,293 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:52:41,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:52:41,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:52:41,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:52:41,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:52:41" (1/1) ... [2020-12-23 06:52:41,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@560568f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:41, skipping insertion in model container [2020-12-23 06:52:41,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:52:41" (1/1) ... [2020-12-23 06:52:41,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:52:41,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:52:41,553 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/loop-crafted/simple_array_index_value_2.i[919,932] left hand side expression in assignment: lhs: VariableLHS[~index~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~array~0,],[BinaryExpression[ARITHMOD,IdentifierExpression[~index~0,],IntegerLiteral[4294967296]]]] left hand side expression in assignment: lhs: VariableLHS[~index~0,] [2020-12-23 06:52:41,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:52:41,580 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:52:41,595 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/loop-crafted/simple_array_index_value_2.i[919,932] left hand side expression in assignment: lhs: VariableLHS[~index~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMOD,IdentifierExpression[~index~0,],IntegerLiteral[4294967296]]]]]] left hand side expression in assignment: lhs: VariableLHS[~index~0,] [2020-12-23 06:52:41,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:52:41,618 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:52:41,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:41 WrapperNode [2020-12-23 06:52:41,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:52:41,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:52:41,620 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:52:41,620 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:52:41,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:41" (1/1) ... [2020-12-23 06:52:41,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:41" (1/1) ... [2020-12-23 06:52:41,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:52:41,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:52:41,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:52:41,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:52:41,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:41" (1/1) ... [2020-12-23 06:52:41,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:41" (1/1) ... [2020-12-23 06:52:41,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:41" (1/1) ... [2020-12-23 06:52:41,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:41" (1/1) ... [2020-12-23 06:52:41,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:41" (1/1) ... [2020-12-23 06:52:41,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:41" (1/1) ... [2020-12-23 06:52:41,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:41" (1/1) ... [2020-12-23 06:52:41,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:52:41,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:52:41,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:52:41,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:52:41,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:52:41,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:52:41,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:52:41,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:52:41,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:52:41,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:52:41,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:52:41,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:52:42,157 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:52:42,160 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 06:52:42,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:52:42 BoogieIcfgContainer [2020-12-23 06:52:42,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:52:42,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:52:42,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:52:42,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:52:42,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:52:41" (1/3) ... [2020-12-23 06:52:42,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4789735e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:52:42, skipping insertion in model container [2020-12-23 06:52:42,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:41" (2/3) ... [2020-12-23 06:52:42,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4789735e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:52:42, skipping insertion in model container [2020-12-23 06:52:42,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:52:42" (3/3) ... [2020-12-23 06:52:42,183 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2020-12-23 06:52:42,199 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:52:42,211 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:52:42,265 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:52:42,332 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:52:42,332 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:52:42,333 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:52:42,333 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:52:42,333 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:52:42,333 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:52:42,333 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:52:42,333 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:52:42,355 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-23 06:52:42,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:52:42,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:42,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:42,362 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:42,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1820178652, now seen corresponding path program 1 times [2020-12-23 06:52:42,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:42,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268956349] [2020-12-23 06:52:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:42,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268956349] [2020-12-23 06:52:42,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:52:42,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:52:42,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978725354] [2020-12-23 06:52:42,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:52:42,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:42,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:52:42,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:52:42,584 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-23 06:52:42,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:42,600 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-12-23 06:52:42,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:52:42,601 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 06:52:42,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:42,610 INFO L225 Difference]: With dead ends: 32 [2020-12-23 06:52:42,610 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 06:52:42,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:52:42,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 06:52:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 06:52:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 06:52:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-23 06:52:42,647 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 7 [2020-12-23 06:52:42,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:42,647 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-23 06:52:42,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:52:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-23 06:52:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:52:42,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:42,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:42,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:52:42,649 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:42,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:42,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1808172879, now seen corresponding path program 1 times [2020-12-23 06:52:42,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:42,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515497380] [2020-12-23 06:52:42,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:42,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515497380] [2020-12-23 06:52:42,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:52:42,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:52:42,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896774577] [2020-12-23 06:52:42,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:52:42,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:42,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:52:42,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:52:42,728 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-12-23 06:52:42,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:42,761 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-23 06:52:42,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:52:42,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 06:52:42,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:42,763 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:52:42,763 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 06:52:42,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:52:42,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 06:52:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2020-12-23 06:52:42,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:52:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-23 06:52:42,770 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 7 [2020-12-23 06:52:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:42,770 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-23 06:52:42,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:52:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-23 06:52:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:52:42,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:42,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:42,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:52:42,772 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:42,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:42,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1968450312, now seen corresponding path program 1 times [2020-12-23 06:52:42,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:42,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252131539] [2020-12-23 06:52:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:42,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252131539] [2020-12-23 06:52:42,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793424555] [2020-12-23 06:52:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:43,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:52:43,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:43,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:43,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:52:43,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209053540] [2020-12-23 06:52:43,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:52:43,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:43,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:52:43,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:52:43,053 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-12-23 06:52:43,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:43,110 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-23 06:52:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:52:43,111 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 06:52:43,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:43,112 INFO L225 Difference]: With dead ends: 40 [2020-12-23 06:52:43,112 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 06:52:43,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:52:43,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 06:52:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2020-12-23 06:52:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 06:52:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 06:52:43,119 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2020-12-23 06:52:43,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:43,119 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 06:52:43,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:52:43,120 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 06:52:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 06:52:43,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:43,121 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:43,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:52:43,336 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:43,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:43,337 INFO L82 PathProgramCache]: Analyzing trace with hash -209237439, now seen corresponding path program 2 times [2020-12-23 06:52:43,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:43,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888686305] [2020-12-23 06:52:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:43,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888686305] [2020-12-23 06:52:43,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169255979] [2020-12-23 06:52:43,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:43,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:52:43,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:43,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:52:43,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:43,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:43,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:52:43,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165308724] [2020-12-23 06:52:43,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:52:43,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:43,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:52:43,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:52:43,697 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-12-23 06:52:43,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:43,810 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-12-23 06:52:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:52:43,811 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 06:52:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:43,812 INFO L225 Difference]: With dead ends: 50 [2020-12-23 06:52:43,812 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 06:52:43,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:52:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 06:52:43,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 22. [2020-12-23 06:52:43,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 06:52:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-23 06:52:43,819 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2020-12-23 06:52:43,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:43,819 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-23 06:52:43,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:52:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-23 06:52:43,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 06:52:43,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:43,821 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:44,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:44,036 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:44,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:44,038 INFO L82 PathProgramCache]: Analyzing trace with hash -667540230, now seen corresponding path program 3 times [2020-12-23 06:52:44,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:44,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941535307] [2020-12-23 06:52:44,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:44,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941535307] [2020-12-23 06:52:44,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110604234] [2020-12-23 06:52:44,147 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:44,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:52:44,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:44,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:52:44,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:44,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:44,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:52:44,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828265430] [2020-12-23 06:52:44,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:52:44,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:44,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:52:44,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:52:44,318 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2020-12-23 06:52:44,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:44,412 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-12-23 06:52:44,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:52:44,412 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-23 06:52:44,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:44,414 INFO L225 Difference]: With dead ends: 60 [2020-12-23 06:52:44,414 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 06:52:44,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:52:44,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 06:52:44,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2020-12-23 06:52:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 06:52:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-23 06:52:44,421 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2020-12-23 06:52:44,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:44,421 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-23 06:52:44,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:52:44,421 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-23 06:52:44,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 06:52:44,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:44,422 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:44,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:44,637 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:44,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:44,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1072235725, now seen corresponding path program 4 times [2020-12-23 06:52:44,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:44,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701168690] [2020-12-23 06:52:44,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:44,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701168690] [2020-12-23 06:52:44,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912607470] [2020-12-23 06:52:44,748 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:44,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:52:44,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:44,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:52:44,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:44,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:44,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:52:44,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854562530] [2020-12-23 06:52:44,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:52:44,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:44,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:52:44,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:52:44,916 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 8 states. [2020-12-23 06:52:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:45,027 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-12-23 06:52:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:52:45,027 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-12-23 06:52:45,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:45,028 INFO L225 Difference]: With dead ends: 70 [2020-12-23 06:52:45,029 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 06:52:45,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:52:45,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 06:52:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 30. [2020-12-23 06:52:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 06:52:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-23 06:52:45,035 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 23 [2020-12-23 06:52:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:45,035 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-23 06:52:45,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:52:45,036 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-23 06:52:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 06:52:45,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:45,037 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:45,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:45,252 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:45,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:45,253 INFO L82 PathProgramCache]: Analyzing trace with hash -2101342996, now seen corresponding path program 5 times [2020-12-23 06:52:45,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:45,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608395826] [2020-12-23 06:52:45,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:45,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608395826] [2020-12-23 06:52:45,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315700765] [2020-12-23 06:52:45,422 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:45,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:52:45,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:45,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:52:45,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:45,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:45,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:52:45,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513586378] [2020-12-23 06:52:45,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:52:45,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:45,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:52:45,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:52:45,777 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 9 states. [2020-12-23 06:52:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:45,957 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-12-23 06:52:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:52:45,960 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-12-23 06:52:45,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:45,965 INFO L225 Difference]: With dead ends: 80 [2020-12-23 06:52:45,965 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 06:52:45,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:52:45,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 06:52:45,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 34. [2020-12-23 06:52:45,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 06:52:45,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-23 06:52:45,982 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2020-12-23 06:52:45,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:45,983 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-23 06:52:45,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:52:45,983 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-23 06:52:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 06:52:45,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:45,985 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:46,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 06:52:46,200 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:46,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:46,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1029203419, now seen corresponding path program 6 times [2020-12-23 06:52:46,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:46,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414648857] [2020-12-23 06:52:46,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:46,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414648857] [2020-12-23 06:52:46,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474572284] [2020-12-23 06:52:46,413 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:46,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:52:46,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:46,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:52:46,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:46,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:46,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:52:46,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146998112] [2020-12-23 06:52:46,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:52:46,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:46,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:52:46,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:52:46,767 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 10 states. [2020-12-23 06:52:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:47,005 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-12-23 06:52:47,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:52:47,005 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-12-23 06:52:47,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:47,008 INFO L225 Difference]: With dead ends: 90 [2020-12-23 06:52:47,008 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 06:52:47,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:52:47,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 06:52:47,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 38. [2020-12-23 06:52:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 06:52:47,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-23 06:52:47,020 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2020-12-23 06:52:47,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:47,020 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-23 06:52:47,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:52:47,020 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-23 06:52:47,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 06:52:47,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:47,022 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:47,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:47,229 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:47,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2099503838, now seen corresponding path program 7 times [2020-12-23 06:52:47,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:47,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084544567] [2020-12-23 06:52:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:47,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084544567] [2020-12-23 06:52:47,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225753690] [2020-12-23 06:52:47,454 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:47,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 06:52:47,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:47,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:47,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:52:47,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615574663] [2020-12-23 06:52:47,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:52:47,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:47,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:52:47,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:52:47,622 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 11 states. [2020-12-23 06:52:47,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:47,917 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-12-23 06:52:47,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:52:47,917 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-12-23 06:52:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:47,919 INFO L225 Difference]: With dead ends: 100 [2020-12-23 06:52:47,919 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 06:52:47,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:52:47,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 06:52:47,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 42. [2020-12-23 06:52:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 06:52:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-23 06:52:47,928 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 35 [2020-12-23 06:52:47,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:47,929 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-23 06:52:47,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:52:47,929 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-23 06:52:47,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 06:52:47,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:47,930 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:48,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:48,144 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:48,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1704253673, now seen corresponding path program 8 times [2020-12-23 06:52:48,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:48,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746899153] [2020-12-23 06:52:48,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:48,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746899153] [2020-12-23 06:52:48,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182818928] [2020-12-23 06:52:48,366 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 [2020-12-23 06:52:48,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:52:48,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:48,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:52:48,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:48,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:48,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:52:48,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528615588] [2020-12-23 06:52:48,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:52:48,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:48,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:52:48,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:52:48,548 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2020-12-23 06:52:48,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:48,871 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2020-12-23 06:52:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:52:48,872 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-12-23 06:52:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:48,873 INFO L225 Difference]: With dead ends: 110 [2020-12-23 06:52:48,873 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 06:52:48,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:52:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 06:52:48,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 46. [2020-12-23 06:52:48,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 06:52:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-12-23 06:52:48,888 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 39 [2020-12-23 06:52:48,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:48,888 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-12-23 06:52:48,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:52:48,889 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-12-23 06:52:48,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 06:52:48,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:48,890 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:49,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 06:52:49,104 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:49,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:49,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2106828496, now seen corresponding path program 9 times [2020-12-23 06:52:49,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:49,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518736374] [2020-12-23 06:52:49,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:49,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518736374] [2020-12-23 06:52:49,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747615014] [2020-12-23 06:52:49,319 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 [2020-12-23 06:52:49,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 06:52:49,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:49,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 06:52:49,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:49,795 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 32 treesize of output 30 [2020-12-23 06:52:49,797 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:49,802 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:52:49,804 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 06:52:49,805 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:9 [2020-12-23 06:52:50,022 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:52:50,023 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 25 treesize of output 58 [2020-12-23 06:52:50,026 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:50,064 INFO L625 ElimStorePlain]: treesize reduction 24, result has 60.7 percent of original size [2020-12-23 06:52:50,071 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:52:50,071 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:31, output treesize:22 [2020-12-23 06:52:50,280 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:52:50,281 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 45 treesize of output 72 [2020-12-23 06:52:50,294 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:52:50,299 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:52:50,305 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:50,395 INFO L625 ElimStorePlain]: treesize reduction 83, result has 43.5 percent of original size [2020-12-23 06:52:50,408 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:52:50,408 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:78, output treesize:74 [2020-12-23 06:52:50,695 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:52:50,695 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 45 treesize of output 72 [2020-12-23 06:52:50,712 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:52:50,716 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:52:50,727 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:50,789 INFO L625 ElimStorePlain]: treesize reduction 79, result has 38.8 percent of original size [2020-12-23 06:52:50,798 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 06:52:50,798 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:61 [2020-12-23 06:52:50,919 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:52:50,920 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 45 treesize of output 72 [2020-12-23 06:52:50,931 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:52:50,934 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:52:50,939 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:51,001 INFO L625 ElimStorePlain]: treesize reduction 79, result has 38.8 percent of original size [2020-12-23 06:52:51,006 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 06:52:51,006 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:61 [2020-12-23 06:52:51,112 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:52:51,113 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 45 treesize of output 72 [2020-12-23 06:52:51,123 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:52:51,126 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:52:51,131 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:51,196 INFO L625 ElimStorePlain]: treesize reduction 79, result has 38.8 percent of original size [2020-12-23 06:52:51,201 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 06:52:51,202 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:61 [2020-12-23 06:52:51,344 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 06:52:51,345 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 41 treesize of output 64 [2020-12-23 06:52:51,355 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 06:52:51,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:52:51,366 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:51,403 INFO L625 ElimStorePlain]: treesize reduction 61, result has 45.0 percent of original size [2020-12-23 06:52:51,405 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 06:52:51,406 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:37 [2020-12-23 06:52:51,523 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:52:51,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:52:51,542 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2020-12-23 06:52:51,567 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:51,575 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 [2020-12-23 06:52:51,576 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:51,626 INFO L625 ElimStorePlain]: treesize reduction 7, result has 90.7 percent of original size [2020-12-23 06:52:51,635 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 06:52:51,636 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:41 [2020-12-23 06:52:51,831 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:52:51,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:52:51,847 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2020-12-23 06:52:51,851 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:51,858 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 [2020-12-23 06:52:51,859 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:51,915 INFO L625 ElimStorePlain]: treesize reduction 12, result has 85.9 percent of original size [2020-12-23 06:52:51,917 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 06:52:51,918 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:46 [2020-12-23 06:52:52,201 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:52:52,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 06:52:52,216 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2020-12-23 06:52:52,218 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:52,225 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 [2020-12-23 06:52:52,226 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:52,283 INFO L625 ElimStorePlain]: treesize reduction 12, result has 85.9 percent of original size [2020-12-23 06:52:52,285 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 06:52:52,286 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:93, output treesize:46 [2020-12-23 06:52:52,529 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 06:52:52,599 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:52:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 06:52:52,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:52,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 31 [2020-12-23 06:52:52,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346990889] [2020-12-23 06:52:52,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:52:52,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:52,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:52:52,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:52:52,670 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 31 states. [2020-12-23 06:52:55,730 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2020-12-23 06:52:56,206 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-12-23 06:52:56,754 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2020-12-23 06:52:57,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:57,739 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2020-12-23 06:52:57,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:52:57,740 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 43 [2020-12-23 06:52:57,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:57,741 INFO L225 Difference]: With dead ends: 120 [2020-12-23 06:52:57,741 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 06:52:57,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=686, Invalid=3604, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:52:57,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 06:52:57,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 56. [2020-12-23 06:52:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 06:52:57,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-12-23 06:52:57,750 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 43 [2020-12-23 06:52:57,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:57,751 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-12-23 06:52:57,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:52:57,751 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-12-23 06:52:57,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 06:52:57,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:57,752 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:57,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:57,967 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:57,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:57,968 INFO L82 PathProgramCache]: Analyzing trace with hash -881563432, now seen corresponding path program 1 times [2020-12-23 06:52:57,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:57,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617319218] [2020-12-23 06:52:57,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 06:52:58,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617319218] [2020-12-23 06:52:58,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936353336] [2020-12-23 06:52:58,257 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:58,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 06:52:58,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:58,467 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 [2020-12-23 06:52:58,468 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:58,504 INFO L625 ElimStorePlain]: treesize reduction 6, result has 87.2 percent of original size [2020-12-23 06:52:58,510 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:52:58,511 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:51, output treesize:52 [2020-12-23 06:52:58,813 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:52:58,815 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:58,853 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:52:58,858 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:52:58,859 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:52:58,941 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:52:58,943 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:58,982 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:52:58,988 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:52:58,989 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:52:59,055 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:52:59,057 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:59,094 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:52:59,100 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:52:59,100 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:52:59,164 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:52:59,166 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:59,205 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:52:59,211 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:52:59,211 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:52:59,271 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:52:59,272 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:59,312 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:52:59,317 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:52:59,317 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:52:59,374 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:52:59,376 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:59,416 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:52:59,422 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:52:59,422 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:52:59,487 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:52:59,489 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:59,544 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:52:59,549 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:52:59,549 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:52:59,605 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:52:59,607 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:59,646 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:52:59,650 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:52:59,650 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:52:59,708 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:52:59,710 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:52:59,748 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:52:59,753 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:52:59,753 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:52:59,945 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:52:59,948 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:52:59,957 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:52:59,962 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 06:53:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 06:53:00,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:00,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2020-12-23 06:53:00,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606621501] [2020-12-23 06:53:00,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:53:00,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:00,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:53:00,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:53:00,040 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 22 states. [2020-12-23 06:53:04,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:04,288 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2020-12-23 06:53:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 06:53:04,289 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 55 [2020-12-23 06:53:04,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:04,290 INFO L225 Difference]: With dead ends: 138 [2020-12-23 06:53:04,290 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 06:53:04,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=379, Invalid=2813, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:53:04,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 06:53:04,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 64. [2020-12-23 06:53:04,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 06:53:04,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-12-23 06:53:04,302 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 55 [2020-12-23 06:53:04,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:04,302 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-12-23 06:53:04,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:53:04,303 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-12-23 06:53:04,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 06:53:04,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:04,304 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:04,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:04,519 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:04,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:04,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2068965159, now seen corresponding path program 2 times [2020-12-23 06:53:04,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:04,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554921454] [2020-12-23 06:53:04,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:04,812 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 06:53:04,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554921454] [2020-12-23 06:53:04,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341319723] [2020-12-23 06:53:04,812 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:04,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:53:04,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:04,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 06:53:04,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:05,015 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 [2020-12-23 06:53:05,016 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:53:05,054 INFO L625 ElimStorePlain]: treesize reduction 6, result has 87.2 percent of original size [2020-12-23 06:53:05,059 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:53:05,059 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:51, output treesize:52 [2020-12-23 06:53:05,347 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:53:05,350 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:53:05,390 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:53:05,395 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:53:05,395 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:53:05,447 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:53:05,451 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:53:05,491 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:53:05,495 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:53:05,495 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:53:05,545 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:53:05,547 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:53:05,588 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:53:05,593 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:53:05,593 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:53:05,642 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:53:05,644 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:53:05,688 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:53:05,691 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:53:05,691 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:53:05,751 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:53:05,753 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:53:05,790 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:53:05,794 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:53:05,794 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:53:05,842 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:53:05,844 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:53:05,889 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:53:05,893 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:53:05,894 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:53:05,943 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:53:05,945 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:53:05,985 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:53:05,989 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:53:05,989 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:53:06,037 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:53:06,039 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:53:06,083 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:53:06,089 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:53:06,090 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:53:06,142 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 0 case distinctions, treesize of input 56 treesize of output 32 [2020-12-23 06:53:06,144 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 06:53:06,182 INFO L625 ElimStorePlain]: treesize reduction 9, result has 82.0 percent of original size [2020-12-23 06:53:06,185 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 06:53:06,186 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:52 [2020-12-23 06:53:06,486 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:53:06,489 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:53:06,498 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:53:06,503 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 06:53:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-23 06:53:06,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:06,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2020-12-23 06:53:06,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775666404] [2020-12-23 06:53:06,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:53:06,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:06,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:53:06,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:53:06,605 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 24 states. [2020-12-23 06:53:08,599 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-23 06:53:09,564 WARN L197 SmtUtils]: Spent 753.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 06:53:10,881 WARN L197 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 06:53:11,979 WARN L197 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 06:53:12,625 WARN L197 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-23 06:53:13,555 WARN L197 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 06:53:15,955 WARN L197 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-23 06:53:17,924 WARN L197 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-23 06:53:19,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:19,119 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2020-12-23 06:53:19,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 06:53:19,120 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 63 [2020-12-23 06:53:19,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:19,121 INFO L225 Difference]: With dead ends: 150 [2020-12-23 06:53:19,121 INFO L226 Difference]: Without dead ends: 137 [2020-12-23 06:53:19,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=388, Invalid=3034, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:53:19,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-23 06:53:19,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 72. [2020-12-23 06:53:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 06:53:19,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-12-23 06:53:19,136 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 63 [2020-12-23 06:53:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:19,136 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-12-23 06:53:19,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:53:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-12-23 06:53:19,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 06:53:19,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:19,137 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:19,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:53:19,345 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:19,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:19,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1050845962, now seen corresponding path program 3 times [2020-12-23 06:53:19,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:19,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219620419] [2020-12-23 06:53:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:53:19,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219620419] [2020-12-23 06:53:19,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963826716] [2020-12-23 06:53:19,688 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:25,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-23 06:53:25,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:25,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:53:25,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:53:25,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:25,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 06:53:25,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147895463] [2020-12-23 06:53:25,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:53:25,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:25,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:53:25,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:53:25,812 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 17 states. [2020-12-23 06:53:26,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:26,728 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2020-12-23 06:53:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:53:26,729 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-12-23 06:53:26,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:26,730 INFO L225 Difference]: With dead ends: 164 [2020-12-23 06:53:26,730 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 06:53:26,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:53:26,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 06:53:26,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 76. [2020-12-23 06:53:26,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 06:53:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-12-23 06:53:26,758 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2020-12-23 06:53:26,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:26,758 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-12-23 06:53:26,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:53:26,758 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-12-23 06:53:26,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 06:53:26,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:26,760 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:26,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:53:26,973 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:26,974 INFO L82 PathProgramCache]: Analyzing trace with hash -72304465, now seen corresponding path program 4 times [2020-12-23 06:53:26,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:26,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811679352] [2020-12-23 06:53:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:53:27,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811679352] [2020-12-23 06:53:27,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788016618] [2020-12-23 06:53:27,390 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:27,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:53:27,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:27,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 06:53:27,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:53:27,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:27,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 06:53:27,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230352725] [2020-12-23 06:53:27,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:53:27,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:27,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:53:27,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:53:27,651 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 18 states. [2020-12-23 06:53:28,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:28,658 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2020-12-23 06:53:28,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:53:28,659 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-12-23 06:53:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:28,660 INFO L225 Difference]: With dead ends: 174 [2020-12-23 06:53:28,660 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 06:53:28,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:53:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 06:53:28,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 80. [2020-12-23 06:53:28,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 06:53:28,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-12-23 06:53:28,671 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 75 [2020-12-23 06:53:28,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:28,672 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-12-23 06:53:28,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:53:28,672 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-12-23 06:53:28,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-23 06:53:28,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:28,673 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:28,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 06:53:28,887 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:28,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:28,887 INFO L82 PathProgramCache]: Analyzing trace with hash -519204888, now seen corresponding path program 5 times [2020-12-23 06:53:28,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:28,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605528374] [2020-12-23 06:53:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:53:29,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605528374] [2020-12-23 06:53:29,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389991349] [2020-12-23 06:53:29,270 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:32,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-23 06:54:32,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:32,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 06:54:32,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:54:32,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:32,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 06:54:32,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534950187] [2020-12-23 06:54:32,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:54:32,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:32,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:54:32,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:54:32,273 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 19 states. [2020-12-23 06:54:33,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:33,382 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2020-12-23 06:54:33,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:54:33,383 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-12-23 06:54:33,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:33,384 INFO L225 Difference]: With dead ends: 184 [2020-12-23 06:54:33,384 INFO L226 Difference]: Without dead ends: 167 [2020-12-23 06:54:33,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:54:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-23 06:54:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 84. [2020-12-23 06:54:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 06:54:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-12-23 06:54:33,396 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 79 [2020-12-23 06:54:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:33,396 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-12-23 06:54:33,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:54:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-12-23 06:54:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 06:54:33,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:33,398 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:33,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:33,599 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:33,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:33,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1857412447, now seen corresponding path program 6 times [2020-12-23 06:54:33,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:33,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127938521] [2020-12-23 06:54:33,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:54:33,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127938521] [2020-12-23 06:54:33,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550665394] [2020-12-23 06:54:33,966 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:08,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 06:55:08,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:08,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 06:55:08,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:55:08,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:08,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 06:55:08,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757322740] [2020-12-23 06:55:08,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:55:08,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:08,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:55:08,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:55:08,453 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 20 states. [2020-12-23 06:55:09,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:09,775 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2020-12-23 06:55:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:55:09,776 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 83 [2020-12-23 06:55:09,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:09,777 INFO L225 Difference]: With dead ends: 194 [2020-12-23 06:55:09,777 INFO L226 Difference]: Without dead ends: 177 [2020-12-23 06:55:09,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:55:09,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-23 06:55:09,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 88. [2020-12-23 06:55:09,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 06:55:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-12-23 06:55:09,789 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2020-12-23 06:55:09,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:09,790 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-12-23 06:55:09,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:55:09,790 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-12-23 06:55:09,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 06:55:09,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:09,791 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:09,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:55:09,998 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:09,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:09,999 INFO L82 PathProgramCache]: Analyzing trace with hash -685985574, now seen corresponding path program 7 times [2020-12-23 06:55:09,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:09,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548812936] [2020-12-23 06:55:10,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:10,457 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:55:10,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548812936] [2020-12-23 06:55:10,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049301288] [2020-12-23 06:55:10,457 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:10,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:55:10,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:55:10,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:10,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 06:55:10,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280941339] [2020-12-23 06:55:10,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:55:10,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:10,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:55:10,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:55:10,780 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 21 states. [2020-12-23 06:55:12,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:12,231 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2020-12-23 06:55:12,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:55:12,232 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2020-12-23 06:55:12,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:12,233 INFO L225 Difference]: With dead ends: 204 [2020-12-23 06:55:12,233 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 06:55:12,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:55:12,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 06:55:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 92. [2020-12-23 06:55:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 06:55:12,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-12-23 06:55:12,248 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 87 [2020-12-23 06:55:12,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:12,248 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-12-23 06:55:12,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:55:12,248 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-12-23 06:55:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 06:55:12,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:12,249 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:12,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:55:12,464 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:12,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:12,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1206158701, now seen corresponding path program 8 times [2020-12-23 06:55:12,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:12,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686129546] [2020-12-23 06:55:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:55:12,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686129546] [2020-12-23 06:55:12,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980384438] [2020-12-23 06:55:12,896 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:13,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:13,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:13,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:55:13,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:55:13,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:13,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 06:55:13,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825263881] [2020-12-23 06:55:13,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:55:13,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:13,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:55:13,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:55:13,173 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 22 states. [2020-12-23 06:55:14,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:14,745 INFO L93 Difference]: Finished difference Result 214 states and 216 transitions. [2020-12-23 06:55:14,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:55:14,746 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 91 [2020-12-23 06:55:14,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:14,748 INFO L225 Difference]: With dead ends: 214 [2020-12-23 06:55:14,748 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 06:55:14,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:55:14,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 06:55:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 96. [2020-12-23 06:55:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 06:55:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-12-23 06:55:14,761 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 91 [2020-12-23 06:55:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:14,761 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-12-23 06:55:14,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:55:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-12-23 06:55:14,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-23 06:55:14,762 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:14,762 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:14,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:14,977 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:14,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:14,977 INFO L82 PathProgramCache]: Analyzing trace with hash 79478732, now seen corresponding path program 9 times [2020-12-23 06:55:14,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:14,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803758261] [2020-12-23 06:55:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:55:15,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803758261] [2020-12-23 06:55:15,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131800492] [2020-12-23 06:55:15,432 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:53,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-12-23 06:55:53,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:53,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:55:53,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:55:53,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:53,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 06:55:53,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419118012] [2020-12-23 06:55:53,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:55:53,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:53,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:55:53,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:55:53,916 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 23 states. [2020-12-23 06:55:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:55,724 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2020-12-23 06:55:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:55:55,725 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 95 [2020-12-23 06:55:55,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:55,726 INFO L225 Difference]: With dead ends: 224 [2020-12-23 06:55:55,726 INFO L226 Difference]: Without dead ends: 207 [2020-12-23 06:55:55,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:55:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-23 06:55:55,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 100. [2020-12-23 06:55:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 06:55:55,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-12-23 06:55:55,740 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2020-12-23 06:55:55,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:55,740 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-12-23 06:55:55,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:55:55,740 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-12-23 06:55:55,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-23 06:55:55,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:55,741 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:55,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:55,942 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:55,943 INFO L82 PathProgramCache]: Analyzing trace with hash -396967803, now seen corresponding path program 10 times [2020-12-23 06:55:55,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:55,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453819436] [2020-12-23 06:55:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:55:56,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453819436] [2020-12-23 06:55:56,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826669195] [2020-12-23 06:55:56,478 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:56,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:55:56,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:56,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 06:55:56,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:55:56,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:56,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 06:55:56,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954939963] [2020-12-23 06:55:56,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:55:56,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:56,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:55:56,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:55:56,837 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 24 states. [2020-12-23 06:55:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:58,775 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2020-12-23 06:55:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:55:58,775 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 99 [2020-12-23 06:55:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:58,777 INFO L225 Difference]: With dead ends: 234 [2020-12-23 06:55:58,777 INFO L226 Difference]: Without dead ends: 217 [2020-12-23 06:55:58,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:55:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-23 06:55:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 104. [2020-12-23 06:55:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 06:55:58,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-12-23 06:55:58,791 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 99 [2020-12-23 06:55:58,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:58,792 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-12-23 06:55:58,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:55:58,792 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-12-23 06:55:58,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 06:55:58,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:58,793 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:59,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:59,009 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:59,010 INFO L82 PathProgramCache]: Analyzing trace with hash 2032123070, now seen corresponding path program 11 times [2020-12-23 06:55:59,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:59,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476365293] [2020-12-23 06:55:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 06:55:59,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476365293] [2020-12-23 06:55:59,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129890730] [2020-12-23 06:55:59,571 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 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