/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-examples/standard_copy1_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:52:39,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:52:39,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:52:39,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:52:39,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:52:39,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:52:39,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:52:39,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:52:39,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:52:39,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:52:39,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:52:39,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:52:39,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:52:39,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:52:39,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:52:39,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:52:39,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:52:39,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:52:39,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:52:39,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:52:39,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:52:39,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:52:39,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:52:39,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:52:39,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 23:52:39,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:52:39,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:52:39,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:52:39,464 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 23:52:39,510 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:52:39,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:52:39,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:52:39,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:52:39,513 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:52:39,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:52:39,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:52:39,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:52:39,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:52:39,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:52:39,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:52:39,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:52:39,515 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:52:39,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:52:39,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:52:39,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:52:39,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:52:39,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:52:39,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:52:39,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:52:39,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:52:39,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:52:39,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:52:39,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:52:39,518 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:52:39,518 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:52:39,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:52:40,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:52:40,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:52:40,047 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:52:40,048 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:52:40,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy1_ground-2.i [2020-12-22 23:52:40,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3f0631bba/7e805a0049a24c488565bb40ecad52df/FLAG01f97c560 [2020-12-22 23:52:40,928 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:52:40,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy1_ground-2.i [2020-12-22 23:52:40,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3f0631bba/7e805a0049a24c488565bb40ecad52df/FLAG01f97c560 [2020-12-22 23:52:41,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3f0631bba/7e805a0049a24c488565bb40ecad52df [2020-12-22 23:52:41,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:52:41,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:52:41,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:52:41,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:52:41,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:52:41,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:52:41" (1/1) ... [2020-12-22 23:52:41,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5318e7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:41, skipping insertion in model container [2020-12-22 23:52:41,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:52:41" (1/1) ... [2020-12-22 23:52:41,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:52:41,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:52:41,479 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-examples/standard_copy1_ground-2.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:52:41,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:52:41,511 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:52:41,526 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-examples/standard_copy1_ground-2.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:52:41,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:52:41,554 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:52:41,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:41 WrapperNode [2020-12-22 23:52:41,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:52:41,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:52:41,558 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:52:41,558 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:52:41,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:41" (1/1) ... [2020-12-22 23:52:41,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:41" (1/1) ... [2020-12-22 23:52:41,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:52:41,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:52:41,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:52:41,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:52:41,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:41" (1/1) ... [2020-12-22 23:52:41,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:41" (1/1) ... [2020-12-22 23:52:41,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:41" (1/1) ... [2020-12-22 23:52:41,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:41" (1/1) ... [2020-12-22 23:52:41,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:41" (1/1) ... [2020-12-22 23:52:41,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:41" (1/1) ... [2020-12-22 23:52:41,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:41" (1/1) ... [2020-12-22 23:52:41,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:52:41,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:52:41,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:52:41,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:52:41,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:52:41,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:52:41,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:52:41,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:52:41,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:52:41,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:52:41,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:52:41,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:52:42,199 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:52:42,199 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 23:52:42,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:52:42 BoogieIcfgContainer [2020-12-22 23:52:42,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:52:42,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:52:42,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:52:42,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:52:42,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:52:41" (1/3) ... [2020-12-22 23:52:42,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26511e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:52:42, skipping insertion in model container [2020-12-22 23:52:42,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:41" (2/3) ... [2020-12-22 23:52:42,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26511e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:52:42, skipping insertion in model container [2020-12-22 23:52:42,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:52:42" (3/3) ... [2020-12-22 23:52:42,227 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-2.i [2020-12-22 23:52:42,235 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:52:42,242 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 23:52:42,269 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 23:52:42,300 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:52:42,300 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:52:42,301 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:52:42,301 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:52:42,301 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:52:42,301 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:52:42,302 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:52:42,302 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:52:42,334 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-22 23:52:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 23:52:42,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:42,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:42,345 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:42,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:42,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2020-12-22 23:52:42,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:42,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981335078] [2020-12-22 23:52:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:52:42,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981335078] [2020-12-22 23:52:42,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:52:42,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:52:42,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909442687] [2020-12-22 23:52:42,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:52:42,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:42,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:52:42,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:52:42,678 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-12-22 23:52:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:42,754 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-12-22 23:52:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:52:42,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-22 23:52:42,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:42,767 INFO L225 Difference]: With dead ends: 34 [2020-12-22 23:52:42,768 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 23:52:42,771 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 [2020-12-22 23:52:42,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 23:52:42,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-22 23:52:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 23:52:42,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-22 23:52:42,812 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2020-12-22 23:52:42,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:42,813 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-22 23:52:42,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:52:42,813 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-22 23:52:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 23:52:42,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:42,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:42,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:52:42,815 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:42,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:42,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1564645395, now seen corresponding path program 1 times [2020-12-22 23:52:42,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:42,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187911505] [2020-12-22 23:52:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:52:42,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187911505] [2020-12-22 23:52:42,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359619486] [2020-12-22 23:52:42,876 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 [2020-12-22 23:52:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:43,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 23:52:43,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:52:43,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:52:43,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 23:52:43,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810680008] [2020-12-22 23:52:43,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:52:43,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:43,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:52:43,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:52:43,089 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-12-22 23:52:43,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:43,116 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-22 23:52:43,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:52:43,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-22 23:52:43,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:43,120 INFO L225 Difference]: With dead ends: 24 [2020-12-22 23:52:43,120 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 23:52:43,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:52:43,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 23:52:43,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-22 23:52:43,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 23:52:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-22 23:52:43,128 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2020-12-22 23:52:43,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:43,129 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-22 23:52:43,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:52:43,129 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-22 23:52:43,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 23:52:43,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:43,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:43,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 23:52:43,346 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:43,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:43,348 INFO L82 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2020-12-22 23:52:43,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:43,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739911047] [2020-12-22 23:52:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:52:43,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739911047] [2020-12-22 23:52:43,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157790525] [2020-12-22 23:52:43,441 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 [2020-12-22 23:52:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:43,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:52:43,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:52:43,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:43,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:52:43,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773532473] [2020-12-22 23:52:43,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:52:43,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:43,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:52:43,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:52:43,561 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2020-12-22 23:52:43,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:43,586 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-12-22 23:52:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:52:43,587 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-22 23:52:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:43,587 INFO L225 Difference]: With dead ends: 30 [2020-12-22 23:52:43,588 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 23:52:43,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:52:43,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 23:52:43,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-22 23:52:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 23:52:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-22 23:52:43,593 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-12-22 23:52:43,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:43,594 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-22 23:52:43,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:52:43,594 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-22 23:52:43,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 23:52:43,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:43,595 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:43,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:43,810 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:43,812 INFO L82 PathProgramCache]: Analyzing trace with hash -628241457, now seen corresponding path program 2 times [2020-12-22 23:52:43,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:43,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079678280] [2020-12-22 23:52:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 23:52:43,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079678280] [2020-12-22 23:52:43,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522805085] [2020-12-22 23:52:43,894 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 [2020-12-22 23:52:43,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:52:43,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:43,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:52:43,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:52:44,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:44,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 23:52:44,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552965166] [2020-12-22 23:52:44,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:52:44,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:44,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:52:44,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:52:44,031 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 7 states. [2020-12-22 23:52:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:44,084 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-12-22 23:52:44,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:52:44,085 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-22 23:52:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:44,086 INFO L225 Difference]: With dead ends: 35 [2020-12-22 23:52:44,086 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 23:52:44,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:52:44,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 23:52:44,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-12-22 23:52:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 23:52:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-22 23:52:44,092 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-12-22 23:52:44,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:44,093 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-22 23:52:44,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:52:44,093 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-22 23:52:44,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 23:52:44,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:44,094 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:44,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:44,308 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:44,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:44,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1927655819, now seen corresponding path program 3 times [2020-12-22 23:52:44,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:44,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071178870] [2020-12-22 23:52:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 23:52:44,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071178870] [2020-12-22 23:52:44,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984515394] [2020-12-22 23:52:44,407 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 [2020-12-22 23:52:44,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 23:52:44,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:44,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:52:44,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 23:52:44,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:44,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-22 23:52:44,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692491182] [2020-12-22 23:52:44,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 23:52:44,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:44,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 23:52:44,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:52:44,598 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 9 states. [2020-12-22 23:52:44,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:44,657 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-12-22 23:52:44,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:52:44,658 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-12-22 23:52:44,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:44,659 INFO L225 Difference]: With dead ends: 41 [2020-12-22 23:52:44,659 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 23:52:44,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:52:44,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 23:52:44,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-12-22 23:52:44,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 23:52:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-22 23:52:44,665 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2020-12-22 23:52:44,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:44,666 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-22 23:52:44,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 23:52:44,666 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-22 23:52:44,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 23:52:44,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:44,667 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:44,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:44,882 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:44,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:44,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1088075449, now seen corresponding path program 4 times [2020-12-22 23:52:44,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:44,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495882720] [2020-12-22 23:52:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 23:52:44,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495882720] [2020-12-22 23:52:44,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118851665] [2020-12-22 23:52:44,967 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 [2020-12-22 23:52:45,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:52:45,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:45,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:52:45,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 23:52:45,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:45,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-22 23:52:45,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403563027] [2020-12-22 23:52:45,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 23:52:45,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:45,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 23:52:45,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:52:45,148 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 11 states. [2020-12-22 23:52:45,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:45,221 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-12-22 23:52:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 23:52:45,222 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-12-22 23:52:45,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:45,224 INFO L225 Difference]: With dead ends: 47 [2020-12-22 23:52:45,224 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 23:52:45,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:52:45,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 23:52:45,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-12-22 23:52:45,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 23:52:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-22 23:52:45,245 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-12-22 23:52:45,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:45,246 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-22 23:52:45,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 23:52:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-22 23:52:45,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 23:52:45,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:45,251 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:45,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 23:52:45,467 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:45,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:45,468 INFO L82 PathProgramCache]: Analyzing trace with hash -509111549, now seen corresponding path program 5 times [2020-12-22 23:52:45,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:45,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307559893] [2020-12-22 23:52:45,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 23:52:45,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307559893] [2020-12-22 23:52:45,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959948845] [2020-12-22 23:52:45,620 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 [2020-12-22 23:52:45,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 23:52:45,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:45,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:52:45,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 23:52:45,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:45,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-12-22 23:52:45,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157459704] [2020-12-22 23:52:45,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 23:52:45,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:45,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 23:52:45,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:52:45,849 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2020-12-22 23:52:45,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:45,958 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-12-22 23:52:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 23:52:45,959 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-12-22 23:52:45,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:45,960 INFO L225 Difference]: With dead ends: 53 [2020-12-22 23:52:45,960 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 23:52:45,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:52:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 23:52:45,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-12-22 23:52:45,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 23:52:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-22 23:52:45,966 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2020-12-22 23:52:45,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:45,967 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-22 23:52:45,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 23:52:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-22 23:52:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 23:52:45,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:45,968 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:46,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:46,183 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:46,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:46,185 INFO L82 PathProgramCache]: Analyzing trace with hash 105352895, now seen corresponding path program 6 times [2020-12-22 23:52:46,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:46,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416047179] [2020-12-22 23:52:46,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 23:52:46,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416047179] [2020-12-22 23:52:46,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387165273] [2020-12-22 23:52:46,285 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 [2020-12-22 23:52:46,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 23:52:46,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:46,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:52:46,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:52:46,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:46,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-12-22 23:52:46,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849451431] [2020-12-22 23:52:46,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 23:52:46,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:46,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 23:52:46,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:52:46,518 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 15 states. [2020-12-22 23:52:46,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:46,612 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-12-22 23:52:46,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 23:52:46,613 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-12-22 23:52:46,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:46,614 INFO L225 Difference]: With dead ends: 59 [2020-12-22 23:52:46,614 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 23:52:46,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:52:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 23:52:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-12-22 23:52:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 23:52:46,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-22 23:52:46,620 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2020-12-22 23:52:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:46,620 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-22 23:52:46,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 23:52:46,621 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-22 23:52:46,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 23:52:46,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:46,622 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:46,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:46,833 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:46,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:46,835 INFO L82 PathProgramCache]: Analyzing trace with hash -497009541, now seen corresponding path program 7 times [2020-12-22 23:52:46,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:46,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852627435] [2020-12-22 23:52:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:52:46,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852627435] [2020-12-22 23:52:46,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061364424] [2020-12-22 23:52:46,947 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 [2020-12-22 23:52:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:47,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:52:47,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:52:47,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:47,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 23:52:47,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403939383] [2020-12-22 23:52:47,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 23:52:47,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:47,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 23:52:47,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:52:47,128 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 11 states. [2020-12-22 23:52:47,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:47,189 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2020-12-22 23:52:47,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:52:47,190 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-12-22 23:52:47,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:47,193 INFO L225 Difference]: With dead ends: 62 [2020-12-22 23:52:47,193 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 23:52:47,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:52:47,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 23:52:47,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-12-22 23:52:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 23:52:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-22 23:52:47,212 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2020-12-22 23:52:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:47,215 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-22 23:52:47,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 23:52:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-22 23:52:47,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 23:52:47,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:47,217 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:47,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 23:52:47,431 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:47,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:47,432 INFO L82 PathProgramCache]: Analyzing trace with hash 531052601, now seen corresponding path program 8 times [2020-12-22 23:52:47,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:47,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885232323] [2020-12-22 23:52:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:52:47,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885232323] [2020-12-22 23:52:47,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066695966] [2020-12-22 23:52:47,627 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 [2020-12-22 23:52:47,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:52:47,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:47,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:52:47,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:52:47,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:47,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 23:52:47,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619567500] [2020-12-22 23:52:47,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:52:47,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:47,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:52:47,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:52:47,774 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 12 states. [2020-12-22 23:52:47,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:47,824 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-12-22 23:52:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 23:52:47,825 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-12-22 23:52:47,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:47,826 INFO L225 Difference]: With dead ends: 64 [2020-12-22 23:52:47,826 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 23:52:47,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:52:47,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 23:52:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-12-22 23:52:47,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 23:52:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-22 23:52:47,831 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-12-22 23:52:47,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:47,832 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-22 23:52:47,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:52:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-22 23:52:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 23:52:47,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:47,833 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:48,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:48,048 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:48,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:48,049 INFO L82 PathProgramCache]: Analyzing trace with hash 656292983, now seen corresponding path program 9 times [2020-12-22 23:52:48,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:48,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177370598] [2020-12-22 23:52:48,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:52:48,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177370598] [2020-12-22 23:52:48,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868651247] [2020-12-22 23:52:48,197 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 [2020-12-22 23:52:48,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 23:52:48,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:48,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 23:52:48,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 23:52:48,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:48,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2020-12-22 23:52:48,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394000035] [2020-12-22 23:52:48,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 23:52:48,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:48,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 23:52:48,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-12-22 23:52:48,457 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 19 states. [2020-12-22 23:52:48,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:48,555 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-12-22 23:52:48,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 23:52:48,555 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2020-12-22 23:52:48,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:48,557 INFO L225 Difference]: With dead ends: 69 [2020-12-22 23:52:48,557 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 23:52:48,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-12-22 23:52:48,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 23:52:48,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-12-22 23:52:48,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 23:52:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-22 23:52:48,569 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2020-12-22 23:52:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:48,569 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-22 23:52:48,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 23:52:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-22 23:52:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 23:52:48,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:48,575 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:48,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:48,790 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:48,791 INFO L82 PathProgramCache]: Analyzing trace with hash -363708877, now seen corresponding path program 10 times [2020-12-22 23:52:48,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:48,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277878030] [2020-12-22 23:52:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 23:52:48,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277878030] [2020-12-22 23:52:48,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399974455] [2020-12-22 23:52:48,978 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 [2020-12-22 23:52:49,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:52:49,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:49,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:52:49,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 23:52:49,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:49,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2020-12-22 23:52:49,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770975007] [2020-12-22 23:52:49,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:52:49,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:49,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:52:49,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:52:49,239 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 21 states. [2020-12-22 23:52:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:49,350 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2020-12-22 23:52:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 23:52:49,350 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2020-12-22 23:52:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:49,351 INFO L225 Difference]: With dead ends: 75 [2020-12-22 23:52:49,351 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 23:52:49,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:52:49,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 23:52:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-12-22 23:52:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 23:52:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-12-22 23:52:49,357 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2020-12-22 23:52:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:49,357 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-12-22 23:52:49,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:52:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-12-22 23:52:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 23:52:49,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:49,359 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:49,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 23:52:49,573 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:49,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:49,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1684803089, now seen corresponding path program 11 times [2020-12-22 23:52:49,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:49,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409618291] [2020-12-22 23:52:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 23:52:49,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409618291] [2020-12-22 23:52:49,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753037654] [2020-12-22 23:52:49,783 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 [2020-12-22 23:52:50,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 23:52:50,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:50,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 23:52:50,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 23:52:50,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:50,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 23:52:50,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139918984] [2020-12-22 23:52:50,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 23:52:50,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:50,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 23:52:50,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:52:50,390 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 15 states. [2020-12-22 23:52:50,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:50,453 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-12-22 23:52:50,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 23:52:50,454 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-12-22 23:52:50,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:50,458 INFO L225 Difference]: With dead ends: 78 [2020-12-22 23:52:50,458 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 23:52:50,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:52:50,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 23:52:50,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-12-22 23:52:50,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 23:52:50,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-12-22 23:52:50,475 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2020-12-22 23:52:50,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:50,475 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-12-22 23:52:50,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 23:52:50,476 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-12-22 23:52:50,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 23:52:50,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:50,477 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:50,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 23:52:50,678 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:50,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:50,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1669775187, now seen corresponding path program 12 times [2020-12-22 23:52:50,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:50,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346084431] [2020-12-22 23:52:50,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 23:52:50,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346084431] [2020-12-22 23:52:50,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595448474] [2020-12-22 23:52:50,872 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 [2020-12-22 23:52:53,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 23:52:53,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:53,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:52:53,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-22 23:52:53,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:53,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2020-12-22 23:52:53,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843853854] [2020-12-22 23:52:53,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 23:52:53,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:53,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 23:52:53,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:52:53,893 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 24 states. [2020-12-22 23:52:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:54,001 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2020-12-22 23:52:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 23:52:54,001 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2020-12-22 23:52:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:54,002 INFO L225 Difference]: With dead ends: 83 [2020-12-22 23:52:54,002 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 23:52:54,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:52:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 23:52:54,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-12-22 23:52:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 23:52:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-12-22 23:52:54,008 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2020-12-22 23:52:54,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:54,008 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-12-22 23:52:54,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 23:52:54,008 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-12-22 23:52:54,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 23:52:54,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:54,009 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:54,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 23:52:54,226 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:54,227 INFO L82 PathProgramCache]: Analyzing trace with hash 557979497, now seen corresponding path program 13 times [2020-12-22 23:52:54,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:54,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384435914] [2020-12-22 23:52:54,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 23:52:54,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384435914] [2020-12-22 23:52:54,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921654510] [2020-12-22 23:52:54,453 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 [2020-12-22 23:52:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:54,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:52:54,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 23:52:54,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:54,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 23:52:54,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652637128] [2020-12-22 23:52:54,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 23:52:54,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:54,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 23:52:54,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:52:54,616 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 17 states. [2020-12-22 23:52:54,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:54,692 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-12-22 23:52:54,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 23:52:54,693 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-12-22 23:52:54,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:54,694 INFO L225 Difference]: With dead ends: 86 [2020-12-22 23:52:54,695 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 23:52:54,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:52:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 23:52:54,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-12-22 23:52:54,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 23:52:54,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-12-22 23:52:54,707 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2020-12-22 23:52:54,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:54,707 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-12-22 23:52:54,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 23:52:54,708 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-12-22 23:52:54,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 23:52:54,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:54,708 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:54,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:54,917 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:54,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:54,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1957371993, now seen corresponding path program 14 times [2020-12-22 23:52:54,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:54,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813745978] [2020-12-22 23:52:54,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 23:52:55,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813745978] [2020-12-22 23:52:55,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961132164] [2020-12-22 23:52:55,166 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 [2020-12-22 23:52:55,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:52:55,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:55,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 23:52:55,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 23:52:55,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:55,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 23:52:55,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492344274] [2020-12-22 23:52:55,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:52:55,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:55,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:52:55,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:52:55,327 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 18 states. [2020-12-22 23:52:55,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:55,398 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-12-22 23:52:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 23:52:55,399 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-12-22 23:52:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:55,399 INFO L225 Difference]: With dead ends: 88 [2020-12-22 23:52:55,400 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 23:52:55,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:52:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 23:52:55,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-12-22 23:52:55,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 23:52:55,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-12-22 23:52:55,405 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2020-12-22 23:52:55,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:55,405 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-12-22 23:52:55,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:52:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-12-22 23:52:55,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 23:52:55,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:55,407 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:55,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 23:52:55,623 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:55,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:55,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1143566235, now seen corresponding path program 15 times [2020-12-22 23:52:55,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:55,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807867295] [2020-12-22 23:52:55,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 23:52:55,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807867295] [2020-12-22 23:52:55,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246573935] [2020-12-22 23:52:55,835 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 [2020-12-22 23:52:56,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 23:52:56,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:56,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:52:56,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-22 23:52:56,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:56,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2020-12-22 23:52:56,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617296137] [2020-12-22 23:52:56,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 23:52:56,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:56,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 23:52:56,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:52:56,711 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 28 states. [2020-12-22 23:52:56,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:56,852 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2020-12-22 23:52:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 23:52:56,853 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 57 [2020-12-22 23:52:56,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:56,853 INFO L225 Difference]: With dead ends: 93 [2020-12-22 23:52:56,853 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 23:52:56,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:52:56,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 23:52:56,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-12-22 23:52:56,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 23:52:56,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-22 23:52:56,859 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2020-12-22 23:52:56,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:56,859 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-22 23:52:56,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 23:52:56,860 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-22 23:52:56,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 23:52:56,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:56,861 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:57,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 23:52:57,076 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:57,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:57,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1160100641, now seen corresponding path program 16 times [2020-12-22 23:52:57,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:57,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421231929] [2020-12-22 23:52:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 23:52:57,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421231929] [2020-12-22 23:52:57,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632229826] [2020-12-22 23:52:57,335 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 [2020-12-22 23:52:57,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:52:57,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:57,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 23:52:57,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 23:52:57,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:57,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 23:52:57,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820800576] [2020-12-22 23:52:57,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 23:52:57,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:57,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 23:52:57,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:52:57,502 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 20 states. [2020-12-22 23:52:57,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:57,575 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2020-12-22 23:52:57,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 23:52:57,576 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 61 [2020-12-22 23:52:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:57,577 INFO L225 Difference]: With dead ends: 96 [2020-12-22 23:52:57,577 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 23:52:57,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:52:57,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 23:52:57,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-12-22 23:52:57,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 23:52:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-12-22 23:52:57,583 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 61 [2020-12-22 23:52:57,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:57,583 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-12-22 23:52:57,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 23:52:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-12-22 23:52:57,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 23:52:57,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:57,584 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:57,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 23:52:57,800 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:57,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:57,801 INFO L82 PathProgramCache]: Analyzing trace with hash -595368609, now seen corresponding path program 17 times [2020-12-22 23:52:57,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:57,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382663921] [2020-12-22 23:52:57,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 23:52:58,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382663921] [2020-12-22 23:52:58,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716783405] [2020-12-22 23:52:58,068 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 [2020-12-22 23:53:00,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 23:53:00,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:00,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 23:53:00,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 23:53:00,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:00,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 23:53:00,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519077077] [2020-12-22 23:53:00,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:53:00,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:00,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:53:00,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:53:00,705 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 21 states. [2020-12-22 23:53:00,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:00,790 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2020-12-22 23:53:00,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 23:53:00,791 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 63 [2020-12-22 23:53:00,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:00,792 INFO L225 Difference]: With dead ends: 98 [2020-12-22 23:53:00,792 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 23:53:00,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:53:00,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 23:53:00,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-12-22 23:53:00,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 23:53:00,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-12-22 23:53:00,797 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 63 [2020-12-22 23:53:00,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:00,797 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-12-22 23:53:00,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:53:00,798 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-12-22 23:53:00,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 23:53:00,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:00,799 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:01,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:01,013 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:01,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:01,014 INFO L82 PathProgramCache]: Analyzing trace with hash 320829469, now seen corresponding path program 18 times [2020-12-22 23:53:01,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:01,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762881091] [2020-12-22 23:53:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 23:53:01,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762881091] [2020-12-22 23:53:01,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808996753] [2020-12-22 23:53:01,330 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:17,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 23:53:17,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:17,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:53:17,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-22 23:53:18,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:18,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 32 [2020-12-22 23:53:18,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369977368] [2020-12-22 23:53:18,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 23:53:18,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:18,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 23:53:18,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:53:18,140 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 32 states. [2020-12-22 23:53:18,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:18,293 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2020-12-22 23:53:18,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 23:53:18,293 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 65 [2020-12-22 23:53:18,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:18,294 INFO L225 Difference]: With dead ends: 103 [2020-12-22 23:53:18,294 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 23:53:18,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:53:18,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 23:53:18,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-12-22 23:53:18,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 23:53:18,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-12-22 23:53:18,298 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2020-12-22 23:53:18,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:18,300 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-12-22 23:53:18,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 23:53:18,300 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-12-22 23:53:18,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 23:53:18,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:18,301 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:18,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:18,512 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:18,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:18,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1142098215, now seen corresponding path program 19 times [2020-12-22 23:53:18,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:18,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341131735] [2020-12-22 23:53:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 23:53:18,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341131735] [2020-12-22 23:53:18,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933833820] [2020-12-22 23:53:18,807 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:18,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 23:53:18,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 23:53:18,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:18,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 23:53:18,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913379712] [2020-12-22 23:53:18,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 23:53:18,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:18,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 23:53:18,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:53:18,998 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 23 states. [2020-12-22 23:53:19,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:19,084 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-12-22 23:53:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 23:53:19,085 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-12-22 23:53:19,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:19,085 INFO L225 Difference]: With dead ends: 106 [2020-12-22 23:53:19,086 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 23:53:19,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:53:19,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 23:53:19,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-22 23:53:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 23:53:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-12-22 23:53:19,090 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 69 [2020-12-22 23:53:19,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:19,090 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-12-22 23:53:19,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 23:53:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-12-22 23:53:19,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 23:53:19,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:19,091 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:19,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 23:53:19,305 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:19,305 INFO L82 PathProgramCache]: Analyzing trace with hash 9667351, now seen corresponding path program 20 times [2020-12-22 23:53:19,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:19,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650817738] [2020-12-22 23:53:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 23:53:19,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650817738] [2020-12-22 23:53:19,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119298469] [2020-12-22 23:53:19,650 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:19,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:53:19,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:19,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 23:53:19,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 23:53:19,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:19,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 23:53:19,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992598374] [2020-12-22 23:53:19,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 23:53:19,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:19,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 23:53:19,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:53:19,865 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 24 states. [2020-12-22 23:53:19,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:19,952 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2020-12-22 23:53:19,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 23:53:19,953 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-12-22 23:53:19,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:19,954 INFO L225 Difference]: With dead ends: 108 [2020-12-22 23:53:19,954 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 23:53:19,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:53:19,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 23:53:19,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-12-22 23:53:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 23:53:19,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-12-22 23:53:19,958 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2020-12-22 23:53:19,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:19,959 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-12-22 23:53:19,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 23:53:19,959 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-12-22 23:53:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 23:53:19,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:19,960 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:20,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 23:53:20,170 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:20,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1245186091, now seen corresponding path program 21 times [2020-12-22 23:53:20,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:20,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745309276] [2020-12-22 23:53:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 23:53:20,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745309276] [2020-12-22 23:53:20,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628014456] [2020-12-22 23:53:20,546 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:21,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 23:53:21,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:21,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 23:53:21,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-22 23:53:21,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:21,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14] total 36 [2020-12-22 23:53:21,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546385284] [2020-12-22 23:53:21,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 23:53:21,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:21,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 23:53:21,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:53:21,824 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 36 states. [2020-12-22 23:53:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:21,991 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-12-22 23:53:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 23:53:21,991 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 73 [2020-12-22 23:53:21,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:21,992 INFO L225 Difference]: With dead ends: 113 [2020-12-22 23:53:21,992 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 23:53:21,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:53:21,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 23:53:21,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-12-22 23:53:21,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 23:53:21,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-12-22 23:53:21,997 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-12-22 23:53:21,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:21,997 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-12-22 23:53:21,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 23:53:21,997 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-12-22 23:53:21,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 23:53:21,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:21,998 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:22,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:22,212 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:22,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash 772524689, now seen corresponding path program 22 times [2020-12-22 23:53:22,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:22,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922137366] [2020-12-22 23:53:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-22 23:53:22,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922137366] [2020-12-22 23:53:22,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908449765] [2020-12-22 23:53:22,640 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:22,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:53:22,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:22,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:53:22,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-22 23:53:23,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:23,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 38 [2020-12-22 23:53:23,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815726505] [2020-12-22 23:53:23,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 23:53:23,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:23,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 23:53:23,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:53:23,121 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2020-12-22 23:53:23,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:23,310 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2020-12-22 23:53:23,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 23:53:23,311 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 77 [2020-12-22 23:53:23,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:23,311 INFO L225 Difference]: With dead ends: 119 [2020-12-22 23:53:23,311 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 23:53:23,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:53:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 23:53:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-12-22 23:53:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-22 23:53:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-12-22 23:53:23,316 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2020-12-22 23:53:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:23,316 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-12-22 23:53:23,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 23:53:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-12-22 23:53:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 23:53:23,317 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:23,317 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:23,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 23:53:23,533 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:23,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:23,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1969172659, now seen corresponding path program 23 times [2020-12-22 23:53:23,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:23,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836910849] [2020-12-22 23:53:23,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-22 23:53:23,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836910849] [2020-12-22 23:53:23,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701716003] [2020-12-22 23:53:23,926 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:38,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 23:53:38,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:38,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:53:38,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-22 23:53:38,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:38,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 40 [2020-12-22 23:53:38,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483381531] [2020-12-22 23:53:38,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 23:53:38,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:38,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 23:53:38,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 23:53:38,592 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 40 states. [2020-12-22 23:53:38,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:38,804 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2020-12-22 23:53:38,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 23:53:38,809 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 81 [2020-12-22 23:53:38,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:38,810 INFO L225 Difference]: With dead ends: 125 [2020-12-22 23:53:38,810 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 23:53:38,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 23:53:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 23:53:38,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-12-22 23:53:38,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 23:53:38,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-12-22 23:53:38,815 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 81 [2020-12-22 23:53:38,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:38,815 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-12-22 23:53:38,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 23:53:38,816 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-12-22 23:53:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 23:53:38,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:38,817 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:39,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:39,018 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:39,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:39,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1289615863, now seen corresponding path program 24 times [2020-12-22 23:53:39,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:39,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734280287] [2020-12-22 23:53:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-22 23:53:39,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734280287] [2020-12-22 23:53:39,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759337524] [2020-12-22 23:53:39,464 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:54:17,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 23:54:17,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:54:17,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 23:54:17,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:54:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-22 23:54:17,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:54:17,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 23:54:17,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836910178] [2020-12-22 23:54:17,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 23:54:17,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:54:17,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 23:54:17,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:54:17,795 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 28 states. [2020-12-22 23:54:17,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:54:17,919 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2020-12-22 23:54:17,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 23:54:17,920 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 85 [2020-12-22 23:54:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:54:17,921 INFO L225 Difference]: With dead ends: 128 [2020-12-22 23:54:17,921 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 23:54:17,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 23:54:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 23:54:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-12-22 23:54:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 23:54:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-12-22 23:54:17,925 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 85 [2020-12-22 23:54:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:54:17,926 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-12-22 23:54:17,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 23:54:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-12-22 23:54:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 23:54:17,927 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:54:17,927 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:54:18,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 23:54:18,141 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:54:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:54:18,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1515476551, now seen corresponding path program 25 times [2020-12-22 23:54:18,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:54:18,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337634357] [2020-12-22 23:54:18,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:54:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:54:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-22 23:54:18,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337634357] [2020-12-22 23:54:18,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548995137] [2020-12-22 23:54:18,639 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:54:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:54:18,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 23:54:18,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:54:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-22 23:54:18,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:54:18,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 23:54:18,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435508332] [2020-12-22 23:54:18,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 23:54:18,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:54:18,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 23:54:18,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:54:18,847 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 29 states. [2020-12-22 23:54:18,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:54:18,954 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2020-12-22 23:54:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 23:54:18,954 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 87 [2020-12-22 23:54:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:54:18,955 INFO L225 Difference]: With dead ends: 130 [2020-12-22 23:54:18,955 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 23:54:18,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:54:18,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 23:54:18,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-22 23:54:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 23:54:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-12-22 23:54:18,959 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 87 [2020-12-22 23:54:18,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:54:18,960 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-12-22 23:54:18,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 23:54:18,960 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-12-22 23:54:18,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-22 23:54:18,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:54:18,961 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:54:19,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 23:54:19,176 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:54:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:54:19,177 INFO L82 PathProgramCache]: Analyzing trace with hash -30175483, now seen corresponding path program 26 times [2020-12-22 23:54:19,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:54:19,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580554284] [2020-12-22 23:54:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:54:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:54:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-22 23:54:19,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580554284] [2020-12-22 23:54:19,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919474863] [2020-12-22 23:54:19,720 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:54:19,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:54:19,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:54:19,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 23:54:19,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:54:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-22 23:54:19,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:54:19,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 23:54:19,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909350051] [2020-12-22 23:54:19,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 23:54:19,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:54:19,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 23:54:19,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:54:19,940 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 30 states. [2020-12-22 23:54:20,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:54:20,089 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2020-12-22 23:54:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 23:54:20,090 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 89 [2020-12-22 23:54:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:54:20,090 INFO L225 Difference]: With dead ends: 132 [2020-12-22 23:54:20,091 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 23:54:20,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:54:20,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 23:54:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-12-22 23:54:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 23:54:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-12-22 23:54:20,094 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2020-12-22 23:54:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:54:20,095 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-12-22 23:54:20,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 23:54:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-12-22 23:54:20,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 23:54:20,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:54:20,096 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:54:20,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 23:54:20,312 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:54:20,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:54:20,313 INFO L82 PathProgramCache]: Analyzing trace with hash 656904259, now seen corresponding path program 27 times [2020-12-22 23:54:20,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:54:20,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313735269] [2020-12-22 23:54:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:54:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:54:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-22 23:54:20,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313735269] [2020-12-22 23:54:20,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118800488] [2020-12-22 23:54:20,888 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:54:24,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-22 23:54:24,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:54:24,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 23:54:24,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:54:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-12-22 23:54:25,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:54:25,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17] total 45 [2020-12-22 23:54:25,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164050854] [2020-12-22 23:54:25,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 23:54:25,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:54:25,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 23:54:25,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 23:54:25,429 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 45 states. [2020-12-22 23:54:25,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:54:25,666 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2020-12-22 23:54:25,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 23:54:25,667 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 91 [2020-12-22 23:54:25,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:54:25,668 INFO L225 Difference]: With dead ends: 137 [2020-12-22 23:54:25,668 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 23:54:25,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 23:54:25,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 23:54:25,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-12-22 23:54:25,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 23:54:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-12-22 23:54:25,673 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 91 [2020-12-22 23:54:25,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:54:25,673 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-12-22 23:54:25,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 23:54:25,674 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-12-22 23:54:25,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 23:54:25,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:54:25,674 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:54:25,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 23:54:25,889 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:54:25,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:54:25,890 INFO L82 PathProgramCache]: Analyzing trace with hash -32748545, now seen corresponding path program 28 times [2020-12-22 23:54:25,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:54:25,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146844748] [2020-12-22 23:54:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:54:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:54:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-22 23:54:26,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146844748] [2020-12-22 23:54:26,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946195305] [2020-12-22 23:54:26,491 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:54:26,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:54:26,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:54:26,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 23:54:26,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:54:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-12-22 23:54:27,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:54:27,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18] total 47 [2020-12-22 23:54:27,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500490275] [2020-12-22 23:54:27,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 23:54:27,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:54:27,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 23:54:27,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 23:54:27,211 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 47 states. [2020-12-22 23:54:27,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:54:27,480 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2020-12-22 23:54:27,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 23:54:27,481 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 95 [2020-12-22 23:54:27,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:54:27,482 INFO L225 Difference]: With dead ends: 143 [2020-12-22 23:54:27,482 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 23:54:27,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 23:54:27,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 23:54:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-12-22 23:54:27,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 23:54:27,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-12-22 23:54:27,487 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 95 [2020-12-22 23:54:27,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:54:27,487 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-12-22 23:54:27,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 23:54:27,487 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-12-22 23:54:27,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 23:54:27,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:54:27,488 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:54:27,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:54:27,704 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:54:27,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:54:27,705 INFO L82 PathProgramCache]: Analyzing trace with hash 808565179, now seen corresponding path program 29 times [2020-12-22 23:54:27,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:54:27,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840326683] [2020-12-22 23:54:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:54:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:54:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-22 23:54:28,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840326683] [2020-12-22 23:54:28,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047001524] [2020-12-22 23:54:28,359 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:56:17,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 23:56:17,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:56:17,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 23:56:17,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:56:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1097 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-22 23:56:17,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:56:17,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 23:56:17,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402246771] [2020-12-22 23:56:17,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 23:56:17,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:56:17,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 23:56:17,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:56:17,406 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 33 states. [2020-12-22 23:56:17,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:56:17,536 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2020-12-22 23:56:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 23:56:17,536 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 99 [2020-12-22 23:56:17,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:56:17,537 INFO L225 Difference]: With dead ends: 146 [2020-12-22 23:56:17,537 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 23:56:17,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:56:17,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 23:56:17,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-12-22 23:56:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 23:56:17,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-12-22 23:56:17,543 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 99 [2020-12-22 23:56:17,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:56:17,543 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-12-22 23:56:17,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 23:56:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-12-22 23:56:17,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 23:56:17,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:56:17,544 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:56:17,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:56:17,746 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:56:17,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:56:17,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1405368967, now seen corresponding path program 30 times [2020-12-22 23:56:17,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:56:17,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505276052] [2020-12-22 23:56:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:56:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:56:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-22 23:56:18,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505276052] [2020-12-22 23:56:18,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036397181] [2020-12-22 23:56:18,479 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true