/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-industry-pattern/array_range_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:19:49,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:19:49,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:19:49,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:19:49,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:19:49,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:19:49,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:19:49,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:19:49,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:19:49,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:19:49,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:19:49,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:19:49,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:19:49,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:19:49,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:19:49,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:19:49,756 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:19:49,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:19:49,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:19:49,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:19:49,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:19:49,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:19:49,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:19:49,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:19:49,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:19:49,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:19:49,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:19:49,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:19:49,799 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 00:19:49,828 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:19:49,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:19:49,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:19:49,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:19:49,830 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:19:49,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:19:49,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:19:49,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:19:49,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:19:49,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:19:49,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:19:49,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:19:49,832 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:19:49,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:19:49,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:19:49,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:19:49,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:19:49,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:19:49,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:19:49,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:19:49,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:19:49,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:19:49,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:19:49,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:19:49,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:19:49,835 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:19:50,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:19:50,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:19:50,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:19:50,253 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:19:50,254 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:19:50,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_range_init.i [2020-12-23 00:19:50,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0e47f4b53/571e7104c6c74061b221d3fd3f996b0f/FLAG096c93f59 [2020-12-23 00:19:50,971 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:19:50,972 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_range_init.i [2020-12-23 00:19:50,980 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0e47f4b53/571e7104c6c74061b221d3fd3f996b0f/FLAG096c93f59 [2020-12-23 00:19:51,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0e47f4b53/571e7104c6c74061b221d3fd3f996b0f [2020-12-23 00:19:51,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:19:51,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:19:51,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:19:51,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:19:51,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:19:51,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:19:51" (1/1) ... [2020-12-23 00:19:51,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e88e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:19:51, skipping insertion in model container [2020-12-23 00:19:51,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:19:51" (1/1) ... [2020-12-23 00:19:51,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:19:51,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:19:51,539 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_range_init.i[809,822] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:19:51,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:19:51,571 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:19:51,586 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_range_init.i[809,822] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:19:51,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:19:51,610 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:19:51,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:19:51 WrapperNode [2020-12-23 00:19:51,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:19:51,612 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:19:51,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:19:51,613 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:19:51,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:19:51" (1/1) ... [2020-12-23 00:19:51,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:19:51" (1/1) ... [2020-12-23 00:19:51,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:19:51,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:19:51,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:19:51,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:19:51,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:19:51" (1/1) ... [2020-12-23 00:19:51,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:19:51" (1/1) ... [2020-12-23 00:19:51,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:19:51" (1/1) ... [2020-12-23 00:19:51,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:19:51" (1/1) ... [2020-12-23 00:19:51,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:19:51" (1/1) ... [2020-12-23 00:19:51,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:19:51" (1/1) ... [2020-12-23 00:19:51,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:19:51" (1/1) ... [2020-12-23 00:19:51,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:19:51,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:19:51,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:19:51,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:19:51,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:19:51" (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 00:19:51,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:19:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:19:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:19:51,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:19:51,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:19:51,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:19:52,060 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:19:52,061 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 00:19:52,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:19:52 BoogieIcfgContainer [2020-12-23 00:19:52,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:19:52,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:19:52,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:19:52,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:19:52,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:19:51" (1/3) ... [2020-12-23 00:19:52,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b4037c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:19:52, skipping insertion in model container [2020-12-23 00:19:52,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:19:51" (2/3) ... [2020-12-23 00:19:52,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b4037c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:19:52, skipping insertion in model container [2020-12-23 00:19:52,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:19:52" (3/3) ... [2020-12-23 00:19:52,074 INFO L111 eAbstractionObserver]: Analyzing ICFG array_range_init.i [2020-12-23 00:19:52,082 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:19:52,087 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:19:52,109 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:19:52,139 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:19:52,139 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:19:52,139 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:19:52,139 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:19:52,139 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:19:52,140 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:19:52,140 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:19:52,140 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:19:52,178 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 00:19:52,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 00:19:52,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:52,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:52,186 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:52,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:52,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2020-12-23 00:19:52,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:52,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307262231] [2020-12-23 00:19:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:52,373 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 00:19:52,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307262231] [2020-12-23 00:19:52,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:19:52,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:19:52,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320375650] [2020-12-23 00:19:52,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:19:52,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:52,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:19:52,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:19:52,404 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-12-23 00:19:52,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:52,424 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2020-12-23 00:19:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:19:52,426 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 00:19:52,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:52,437 INFO L225 Difference]: With dead ends: 27 [2020-12-23 00:19:52,437 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 00:19:52,440 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 00:19:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 00:19:52,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 00:19:52,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 00:19:52,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-23 00:19:52,483 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2020-12-23 00:19:52,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:52,483 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-23 00:19:52,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:19:52,484 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-23 00:19:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 00:19:52,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:52,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:52,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:19:52,485 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:52,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:52,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2020-12-23 00:19:52,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:52,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32312350] [2020-12-23 00:19:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:52,547 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 00:19:52,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32312350] [2020-12-23 00:19:52,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:19:52,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:19:52,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791732625] [2020-12-23 00:19:52,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:19:52,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:52,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:19:52,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:19:52,552 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2020-12-23 00:19:52,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:52,643 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-12-23 00:19:52,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:19:52,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 00:19:52,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:52,649 INFO L225 Difference]: With dead ends: 31 [2020-12-23 00:19:52,649 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 00:19:52,650 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 00:19:52,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 00:19:52,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2020-12-23 00:19:52,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 00:19:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-23 00:19:52,657 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2020-12-23 00:19:52,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:52,657 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-23 00:19:52,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:19:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-23 00:19:52,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:19:52,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:52,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:52,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:19:52,659 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:52,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:52,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1721274617, now seen corresponding path program 1 times [2020-12-23 00:19:52,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:52,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630125696] [2020-12-23 00:19:52,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:52,775 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 00:19:52,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630125696] [2020-12-23 00:19:52,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471052192] [2020-12-23 00:19:52,778 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 00:19:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:52,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:19:52,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:53,029 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 00:19:53,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:53,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:19:53,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943560768] [2020-12-23 00:19:53,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:19:53,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:53,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:19:53,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:19:53,039 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-12-23 00:19:53,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:53,126 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-12-23 00:19:53,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:19:53,127 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 00:19:53,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:53,131 INFO L225 Difference]: With dead ends: 38 [2020-12-23 00:19:53,138 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 00:19:53,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:19:53,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 00:19:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2020-12-23 00:19:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 00:19:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-23 00:19:53,151 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2020-12-23 00:19:53,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:53,152 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-23 00:19:53,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:19:53,152 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-23 00:19:53,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:19:53,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:53,154 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:53,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 00:19:53,364 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:53,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:53,366 INFO L82 PathProgramCache]: Analyzing trace with hash -563082289, now seen corresponding path program 2 times [2020-12-23 00:19:53,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:53,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751831313] [2020-12-23 00:19:53,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:19:53,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751831313] [2020-12-23 00:19:53,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:19:53,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:19:53,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033280822] [2020-12-23 00:19:53,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:19:53,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:53,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:19:53,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:19:53,441 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 4 states. [2020-12-23 00:19:53,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:53,477 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-12-23 00:19:53,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:19:53,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 00:19:53,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:53,481 INFO L225 Difference]: With dead ends: 44 [2020-12-23 00:19:53,481 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 00:19:53,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:19:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 00:19:53,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 19. [2020-12-23 00:19:53,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 00:19:53,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-23 00:19:53,488 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2020-12-23 00:19:53,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:53,488 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-23 00:19:53,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:19:53,488 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-23 00:19:53,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 00:19:53,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:53,489 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:53,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 00:19:53,489 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:53,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:53,490 INFO L82 PathProgramCache]: Analyzing trace with hash -847687543, now seen corresponding path program 1 times [2020-12-23 00:19:53,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:53,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540113144] [2020-12-23 00:19:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:53,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540113144] [2020-12-23 00:19:53,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748278269] [2020-12-23 00:19:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:53,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:19:53,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:53,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:53,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 00:19:53,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125028298] [2020-12-23 00:19:53,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:19:53,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:53,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:19:53,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:19:53,653 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2020-12-23 00:19:53,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:53,724 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-12-23 00:19:53,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:19:53,725 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 00:19:53,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:53,726 INFO L225 Difference]: With dead ends: 61 [2020-12-23 00:19:53,726 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 00:19:53,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:19:53,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 00:19:53,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 25. [2020-12-23 00:19:53,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 00:19:53,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-12-23 00:19:53,735 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 16 [2020-12-23 00:19:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:53,735 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-12-23 00:19:53,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:19:53,735 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-12-23 00:19:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 00:19:53,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:53,736 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:53,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:53,950 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:53,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:53,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1254259593, now seen corresponding path program 2 times [2020-12-23 00:19:53,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:53,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598967231] [2020-12-23 00:19:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:54,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598967231] [2020-12-23 00:19:54,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055229627] [2020-12-23 00:19:54,042 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 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 00:19:54,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:19:54,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:19:54,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:19:54,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:54,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:54,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 00:19:54,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679375040] [2020-12-23 00:19:54,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:19:54,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:54,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:19:54,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:19:54,176 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 9 states. [2020-12-23 00:19:54,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:54,262 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2020-12-23 00:19:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:19:54,263 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-23 00:19:54,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:54,265 INFO L225 Difference]: With dead ends: 85 [2020-12-23 00:19:54,265 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 00:19:54,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:19:54,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 00:19:54,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 31. [2020-12-23 00:19:54,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:19:54,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-23 00:19:54,274 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 22 [2020-12-23 00:19:54,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:54,274 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-23 00:19:54,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:19:54,274 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-23 00:19:54,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 00:19:54,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:54,276 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:54,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:54,492 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:54,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:54,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1723898231, now seen corresponding path program 3 times [2020-12-23 00:19:54,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:54,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558618416] [2020-12-23 00:19:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:54,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558618416] [2020-12-23 00:19:54,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900447947] [2020-12-23 00:19:54,689 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 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 00:19:54,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:19:54,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:19:54,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:19:54,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 00:19:54,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:54,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2020-12-23 00:19:54,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350050161] [2020-12-23 00:19:54,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 00:19:54,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:54,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 00:19:54,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:19:54,833 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 13 states. [2020-12-23 00:19:54,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:54,995 INFO L93 Difference]: Finished difference Result 145 states and 168 transitions. [2020-12-23 00:19:54,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:19:54,995 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-12-23 00:19:54,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:54,997 INFO L225 Difference]: With dead ends: 145 [2020-12-23 00:19:54,997 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 00:19:54,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:19:54,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 00:19:55,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 43. [2020-12-23 00:19:55,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 00:19:55,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-12-23 00:19:55,007 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 28 [2020-12-23 00:19:55,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:55,008 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-12-23 00:19:55,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 00:19:55,008 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-12-23 00:19:55,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 00:19:55,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:55,009 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:55,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:55,226 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:55,227 INFO L82 PathProgramCache]: Analyzing trace with hash 388456135, now seen corresponding path program 4 times [2020-12-23 00:19:55,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:55,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595380909] [2020-12-23 00:19:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:55,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595380909] [2020-12-23 00:19:55,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122057090] [2020-12-23 00:19:55,391 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 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 00:19:55,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:19:55,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:19:55,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:19:55,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:55,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:55,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 00:19:55,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634000823] [2020-12-23 00:19:55,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:19:55,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:19:55,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:19:55,551 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 15 states. [2020-12-23 00:19:55,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:55,736 INFO L93 Difference]: Finished difference Result 179 states and 209 transitions. [2020-12-23 00:19:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:19:55,737 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-12-23 00:19:55,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:55,739 INFO L225 Difference]: With dead ends: 179 [2020-12-23 00:19:55,739 INFO L226 Difference]: Without dead ends: 172 [2020-12-23 00:19:55,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:19:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-23 00:19:55,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 52. [2020-12-23 00:19:55,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 00:19:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2020-12-23 00:19:55,750 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 40 [2020-12-23 00:19:55,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:55,750 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2020-12-23 00:19:55,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:19:55,750 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2020-12-23 00:19:55,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 00:19:55,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:55,752 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:55,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:55,968 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:55,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:55,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1486396785, now seen corresponding path program 5 times [2020-12-23 00:19:55,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:55,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222399298] [2020-12-23 00:19:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:56,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222399298] [2020-12-23 00:19:56,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977139783] [2020-12-23 00:19:56,212 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 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 00:19:56,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-12-23 00:19:56,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:19:56,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 00:19:56,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 63 proven. 222 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 00:19:56,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:56,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2020-12-23 00:19:56,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515190408] [2020-12-23 00:19:56,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 00:19:56,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:56,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 00:19:56,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:19:56,647 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 30 states. [2020-12-23 00:19:57,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:57,702 INFO L93 Difference]: Finished difference Result 236 states and 279 transitions. [2020-12-23 00:19:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:19:57,703 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 49 [2020-12-23 00:19:57,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:57,705 INFO L225 Difference]: With dead ends: 236 [2020-12-23 00:19:57,705 INFO L226 Difference]: Without dead ends: 188 [2020-12-23 00:19:57,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=423, Invalid=1217, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 00:19:57,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-23 00:19:57,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 64. [2020-12-23 00:19:57,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 00:19:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-12-23 00:19:57,718 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 49 [2020-12-23 00:19:57,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:57,719 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-12-23 00:19:57,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 00:19:57,719 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-12-23 00:19:57,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 00:19:57,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:57,721 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 15, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:57,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:19:57,935 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:57,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:57,936 INFO L82 PathProgramCache]: Analyzing trace with hash 349904839, now seen corresponding path program 6 times [2020-12-23 00:19:57,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:57,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081634868] [2020-12-23 00:19:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:58,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081634868] [2020-12-23 00:19:58,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548839740] [2020-12-23 00:19:58,247 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 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 00:19:58,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 00:19:58,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:19:58,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:19:58,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 117 proven. 7 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-23 00:19:58,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:58,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6] total 24 [2020-12-23 00:19:58,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580345277] [2020-12-23 00:19:58,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:19:58,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:58,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:19:58,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:19:58,565 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 24 states. [2020-12-23 00:19:58,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:19:58,883 INFO L93 Difference]: Finished difference Result 300 states and 329 transitions. [2020-12-23 00:19:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:19:58,884 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-12-23 00:19:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:19:58,886 INFO L225 Difference]: With dead ends: 300 [2020-12-23 00:19:58,887 INFO L226 Difference]: Without dead ends: 293 [2020-12-23 00:19:58,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:19:58,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-12-23 00:19:58,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 157. [2020-12-23 00:19:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 00:19:58,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 183 transitions. [2020-12-23 00:19:58,913 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 183 transitions. Word has length 58 [2020-12-23 00:19:58,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:19:58,914 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 183 transitions. [2020-12-23 00:19:58,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:19:58,914 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 183 transitions. [2020-12-23 00:19:58,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 00:19:58,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:19:58,917 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 19, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:19:59,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:19:59,132 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:19:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:19:59,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1751630737, now seen corresponding path program 7 times [2020-12-23 00:19:59,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:19:59,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008844660] [2020-12-23 00:19:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:19:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:59,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008844660] [2020-12-23 00:19:59,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624761273] [2020-12-23 00:19:59,556 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 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 00:19:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:19:59,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:19:59,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:19:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:19:59,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:19:59,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 00:19:59,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086443763] [2020-12-23 00:19:59,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:19:59,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:19:59,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:19:59,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:19:59,810 INFO L87 Difference]: Start difference. First operand 157 states and 183 transitions. Second operand 26 states. [2020-12-23 00:20:00,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:00,112 INFO L93 Difference]: Finished difference Result 386 states and 440 transitions. [2020-12-23 00:20:00,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:20:00,113 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-12-23 00:20:00,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:00,115 INFO L225 Difference]: With dead ends: 386 [2020-12-23 00:20:00,116 INFO L226 Difference]: Without dead ends: 379 [2020-12-23 00:20:00,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:20:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-12-23 00:20:00,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 133. [2020-12-23 00:20:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 00:20:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 162 transitions. [2020-12-23 00:20:00,134 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 162 transitions. Word has length 73 [2020-12-23 00:20:00,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:00,134 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 162 transitions. [2020-12-23 00:20:00,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:20:00,135 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 162 transitions. [2020-12-23 00:20:00,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 00:20:00,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:00,137 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 23, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:00,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:20:00,350 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:00,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:00,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1063153041, now seen corresponding path program 8 times [2020-12-23 00:20:00,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:00,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616926981] [2020-12-23 00:20:00,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:00,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616926981] [2020-12-23 00:20:00,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278662889] [2020-12-23 00:20:00,878 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 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 00:20:00,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:20:00,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:20:00,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 00:20:00,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:20:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:01,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:20:01,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 00:20:01,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933329694] [2020-12-23 00:20:01,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 00:20:01,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:01,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 00:20:01,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:20:01,094 INFO L87 Difference]: Start difference. First operand 133 states and 162 transitions. Second operand 30 states. [2020-12-23 00:20:01,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:01,427 INFO L93 Difference]: Finished difference Result 386 states and 443 transitions. [2020-12-23 00:20:01,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:20:01,428 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2020-12-23 00:20:01,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:01,430 INFO L225 Difference]: With dead ends: 386 [2020-12-23 00:20:01,430 INFO L226 Difference]: Without dead ends: 379 [2020-12-23 00:20:01,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:20:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-12-23 00:20:01,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 145. [2020-12-23 00:20:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 00:20:01,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 178 transitions. [2020-12-23 00:20:01,447 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 178 transitions. Word has length 85 [2020-12-23 00:20:01,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:01,447 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 178 transitions. [2020-12-23 00:20:01,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 00:20:01,447 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 178 transitions. [2020-12-23 00:20:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 00:20:01,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:01,449 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 27, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:01,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:20:01,663 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:01,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:01,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1470502801, now seen corresponding path program 9 times [2020-12-23 00:20:01,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:01,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228142187] [2020-12-23 00:20:01,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:02,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228142187] [2020-12-23 00:20:02,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286062075] [2020-12-23 00:20:02,415 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 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 00:20:02,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 00:20:02,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:20:02,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:20:02,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:20:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 293 proven. 15 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-12-23 00:20:02,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:20:02,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7] total 38 [2020-12-23 00:20:02,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653767267] [2020-12-23 00:20:02,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 00:20:02,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:02,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 00:20:02,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:20:02,789 INFO L87 Difference]: Start difference. First operand 145 states and 178 transitions. Second operand 38 states. [2020-12-23 00:20:03,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:03,321 INFO L93 Difference]: Finished difference Result 543 states and 625 transitions. [2020-12-23 00:20:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 00:20:03,322 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 97 [2020-12-23 00:20:03,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:03,325 INFO L225 Difference]: With dead ends: 543 [2020-12-23 00:20:03,325 INFO L226 Difference]: Without dead ends: 536 [2020-12-23 00:20:03,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:20:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-12-23 00:20:03,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 199. [2020-12-23 00:20:03,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-23 00:20:03,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 239 transitions. [2020-12-23 00:20:03,343 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 239 transitions. Word has length 97 [2020-12-23 00:20:03,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:03,343 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 239 transitions. [2020-12-23 00:20:03,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 00:20:03,343 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 239 transitions. [2020-12-23 00:20:03,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-23 00:20:03,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:03,353 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 32, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:03,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:20:03,555 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:03,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:03,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1494928817, now seen corresponding path program 10 times [2020-12-23 00:20:03,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:03,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522947718] [2020-12-23 00:20:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:04,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522947718] [2020-12-23 00:20:04,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572470769] [2020-12-23 00:20:04,549 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 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 00:20:04,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:20:04,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:20:04,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 00:20:04,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:20:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:04,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:20:04,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 00:20:04,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394287326] [2020-12-23 00:20:04,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 00:20:04,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:04,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 00:20:04,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:20:04,839 INFO L87 Difference]: Start difference. First operand 199 states and 239 transitions. Second operand 40 states. [2020-12-23 00:20:05,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:05,393 INFO L93 Difference]: Finished difference Result 596 states and 692 transitions. [2020-12-23 00:20:05,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 00:20:05,394 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 115 [2020-12-23 00:20:05,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:05,398 INFO L225 Difference]: With dead ends: 596 [2020-12-23 00:20:05,398 INFO L226 Difference]: Without dead ends: 589 [2020-12-23 00:20:05,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 00:20:05,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-12-23 00:20:05,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 178. [2020-12-23 00:20:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 00:20:05,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 222 transitions. [2020-12-23 00:20:05,414 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 222 transitions. Word has length 115 [2020-12-23 00:20:05,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:05,414 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 222 transitions. [2020-12-23 00:20:05,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 00:20:05,414 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 222 transitions. [2020-12-23 00:20:05,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 00:20:05,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:05,416 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 37, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:05,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:20:05,624 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:05,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:05,625 INFO L82 PathProgramCache]: Analyzing trace with hash 266693767, now seen corresponding path program 11 times [2020-12-23 00:20:05,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:05,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317729548] [2020-12-23 00:20:05,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:06,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317729548] [2020-12-23 00:20:06,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403628817] [2020-12-23 00:20:06,777 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 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 00:20:16,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-23 00:20:16,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:20:16,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 00:20:16,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:20:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:16,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:20:16,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 00:20:16,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59997409] [2020-12-23 00:20:16,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 00:20:16,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:16,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 00:20:16,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:20:16,346 INFO L87 Difference]: Start difference. First operand 178 states and 222 transitions. Second operand 45 states. [2020-12-23 00:20:17,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:17,116 INFO L93 Difference]: Finished difference Result 569 states and 657 transitions. [2020-12-23 00:20:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 00:20:17,117 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2020-12-23 00:20:17,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:17,120 INFO L225 Difference]: With dead ends: 569 [2020-12-23 00:20:17,120 INFO L226 Difference]: Without dead ends: 562 [2020-12-23 00:20:17,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 00:20:17,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2020-12-23 00:20:17,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 193. [2020-12-23 00:20:17,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-23 00:20:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 242 transitions. [2020-12-23 00:20:17,135 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 242 transitions. Word has length 130 [2020-12-23 00:20:17,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:17,135 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 242 transitions. [2020-12-23 00:20:17,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 00:20:17,135 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 242 transitions. [2020-12-23 00:20:17,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-23 00:20:17,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:17,137 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 42, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:17,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:20:17,351 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:17,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:17,352 INFO L82 PathProgramCache]: Analyzing trace with hash -351110321, now seen corresponding path program 12 times [2020-12-23 00:20:17,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:17,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800622593] [2020-12-23 00:20:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:18,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800622593] [2020-12-23 00:20:18,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249132810] [2020-12-23 00:20:18,957 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 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 00:20:19,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-23 00:20:19,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:20:19,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:20:19,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:20:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 583 proven. 26 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2020-12-23 00:20:19,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:20:19,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 8] total 55 [2020-12-23 00:20:19,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319247058] [2020-12-23 00:20:19,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 00:20:19,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:19,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 00:20:19,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 00:20:19,666 INFO L87 Difference]: Start difference. First operand 193 states and 242 transitions. Second operand 55 states. [2020-12-23 00:20:21,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:21,089 INFO L93 Difference]: Finished difference Result 789 states and 919 transitions. [2020-12-23 00:20:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 00:20:21,090 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 145 [2020-12-23 00:20:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:21,095 INFO L225 Difference]: With dead ends: 789 [2020-12-23 00:20:21,095 INFO L226 Difference]: Without dead ends: 782 [2020-12-23 00:20:21,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 00:20:21,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2020-12-23 00:20:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 250. [2020-12-23 00:20:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-12-23 00:20:21,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 307 transitions. [2020-12-23 00:20:21,117 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 307 transitions. Word has length 145 [2020-12-23 00:20:21,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:21,118 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 307 transitions. [2020-12-23 00:20:21,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 00:20:21,118 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 307 transitions. [2020-12-23 00:20:21,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-23 00:20:21,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:21,122 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 48, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:21,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:20:21,337 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:21,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1248529911, now seen corresponding path program 13 times [2020-12-23 00:20:21,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:21,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106462628] [2020-12-23 00:20:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:23,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106462628] [2020-12-23 00:20:23,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910494074] [2020-12-23 00:20:23,358 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 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 00:20:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:23,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 00:20:23,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:20:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:23,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:20:23,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-23 00:20:23,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055348528] [2020-12-23 00:20:23,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 00:20:23,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:23,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 00:20:23,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 00:20:23,723 INFO L87 Difference]: Start difference. First operand 250 states and 307 transitions. Second operand 57 states. [2020-12-23 00:20:24,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:24,938 INFO L93 Difference]: Finished difference Result 851 states and 998 transitions. [2020-12-23 00:20:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 00:20:24,938 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 166 [2020-12-23 00:20:24,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:24,944 INFO L225 Difference]: With dead ends: 851 [2020-12-23 00:20:24,944 INFO L226 Difference]: Without dead ends: 844 [2020-12-23 00:20:24,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 00:20:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-23 00:20:24,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 232. [2020-12-23 00:20:24,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-23 00:20:24,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 294 transitions. [2020-12-23 00:20:24,963 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 294 transitions. Word has length 166 [2020-12-23 00:20:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:24,964 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 294 transitions. [2020-12-23 00:20:24,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 00:20:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 294 transitions. [2020-12-23 00:20:24,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-23 00:20:24,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:24,967 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 54, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:25,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:20:25,182 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:25,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:25,183 INFO L82 PathProgramCache]: Analyzing trace with hash 506786569, now seen corresponding path program 14 times [2020-12-23 00:20:25,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:25,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008873102] [2020-12-23 00:20:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:27,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008873102] [2020-12-23 00:20:27,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662525257] [2020-12-23 00:20:27,659 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 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 00:20:27,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:20:27,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:20:27,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 00:20:27,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:20:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:28,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:20:28,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-23 00:20:28,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639712835] [2020-12-23 00:20:28,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 00:20:28,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:28,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 00:20:28,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 00:20:28,070 INFO L87 Difference]: Start difference. First operand 232 states and 294 transitions. Second operand 63 states. [2020-12-23 00:20:29,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:29,529 INFO L93 Difference]: Finished difference Result 788 states and 913 transitions. [2020-12-23 00:20:29,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 00:20:29,529 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 184 [2020-12-23 00:20:29,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:29,533 INFO L225 Difference]: With dead ends: 788 [2020-12-23 00:20:29,533 INFO L226 Difference]: Without dead ends: 781 [2020-12-23 00:20:29,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 00:20:29,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2020-12-23 00:20:29,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 250. [2020-12-23 00:20:29,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-12-23 00:20:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 318 transitions. [2020-12-23 00:20:29,552 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 318 transitions. Word has length 184 [2020-12-23 00:20:29,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:29,553 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 318 transitions. [2020-12-23 00:20:29,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 00:20:29,553 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 318 transitions. [2020-12-23 00:20:29,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-23 00:20:29,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:29,556 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 60, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:29,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:20:29,770 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:29,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:29,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1228321801, now seen corresponding path program 15 times [2020-12-23 00:20:29,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:29,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683585142] [2020-12-23 00:20:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:32,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683585142] [2020-12-23 00:20:32,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603399403] [2020-12-23 00:20:32,757 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 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 00:20:32,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 00:20:32,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:20:32,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:20:32,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:20:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 1014 proven. 40 refuted. 0 times theorem prover too weak. 5251 trivial. 0 not checked. [2020-12-23 00:20:33,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:20:33,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 9] total 75 [2020-12-23 00:20:33,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114041476] [2020-12-23 00:20:33,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 00:20:33,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:33,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 00:20:33,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 00:20:33,604 INFO L87 Difference]: Start difference. First operand 250 states and 318 transitions. Second operand 75 states. [2020-12-23 00:20:36,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:36,141 INFO L93 Difference]: Finished difference Result 1080 states and 1267 transitions. [2020-12-23 00:20:36,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 00:20:36,141 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 202 [2020-12-23 00:20:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:36,147 INFO L225 Difference]: With dead ends: 1080 [2020-12-23 00:20:36,147 INFO L226 Difference]: Without dead ends: 1073 [2020-12-23 00:20:36,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 00:20:36,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2020-12-23 00:20:36,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 310. [2020-12-23 00:20:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-12-23 00:20:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 387 transitions. [2020-12-23 00:20:36,173 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 387 transitions. Word has length 202 [2020-12-23 00:20:36,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:36,173 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 387 transitions. [2020-12-23 00:20:36,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 00:20:36,173 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 387 transitions. [2020-12-23 00:20:36,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-23 00:20:36,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:36,177 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 67, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:36,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:20:36,391 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:36,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:36,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1611552071, now seen corresponding path program 16 times [2020-12-23 00:20:36,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:36,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605033565] [2020-12-23 00:20:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 7957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:40,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605033565] [2020-12-23 00:20:40,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456035819] [2020-12-23 00:20:40,232 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 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 00:20:40,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:20:40,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:20:40,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 00:20:40,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:20:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 7957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:40,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:20:40,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-23 00:20:40,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476493463] [2020-12-23 00:20:40,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-23 00:20:40,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:20:40,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-23 00:20:40,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 00:20:40,697 INFO L87 Difference]: Start difference. First operand 310 states and 387 transitions. Second operand 77 states. [2020-12-23 00:20:42,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:20:42,938 INFO L93 Difference]: Finished difference Result 1151 states and 1358 transitions. [2020-12-23 00:20:42,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 00:20:42,939 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 226 [2020-12-23 00:20:42,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:20:42,944 INFO L225 Difference]: With dead ends: 1151 [2020-12-23 00:20:42,945 INFO L226 Difference]: Without dead ends: 1144 [2020-12-23 00:20:42,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 00:20:42,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2020-12-23 00:20:42,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 295. [2020-12-23 00:20:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-12-23 00:20:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 378 transitions. [2020-12-23 00:20:42,972 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 378 transitions. Word has length 226 [2020-12-23 00:20:42,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:20:42,973 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 378 transitions. [2020-12-23 00:20:42,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-23 00:20:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 378 transitions. [2020-12-23 00:20:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-12-23 00:20:42,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:20:42,976 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 74, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:20:43,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:20:43,191 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:20:43,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:20:43,192 INFO L82 PathProgramCache]: Analyzing trace with hash -58443505, now seen corresponding path program 17 times [2020-12-23 00:20:43,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:20:43,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168049189] [2020-12-23 00:20:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:20:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:20:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 0 proven. 9560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:20:47,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168049189] [2020-12-23 00:20:47,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849850351] [2020-12-23 00:20:47,668 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 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