/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-lit/mcmillan2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:51:39,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:51:39,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:51:39,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:51:39,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:51:39,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:51:39,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:51:39,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:51:39,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:51:39,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:51:39,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:51:39,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:51:39,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:51:39,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:51:39,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:51:39,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:51:39,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:51:39,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:51:39,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:51:39,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:51:39,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:51:39,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:51:39,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:51:39,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:51:39,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:51:39,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:51:39,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:51:39,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:51:39,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:51:39,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:51:39,667 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:51:39,668 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:51:39,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:51:39,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:51:39,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:51:39,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:51:39,681 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:51:39,734 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:51:39,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:51:39,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:51:39,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:51:39,739 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:51:39,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:51:39,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:51:39,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:51:39,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:51:39,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:51:39,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:51:39,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:51:39,741 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:51:39,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:51:39,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:51:39,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:51:39,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:51:39,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:51:39,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:51:39,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:51:39,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:51:39,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:51:39,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:51:39,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:51:39,744 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:51:39,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:51:40,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:51:40,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:51:40,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:51:40,261 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:51:40,261 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:51:40,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/mcmillan2006.i [2021-01-06 16:51:40,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e58dfbfaf/d884cfa9affd40eeb7d284586c2f27de/FLAG46a1b5cdf [2021-01-06 16:51:40,975 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:51:40,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-lit/mcmillan2006.i [2021-01-06 16:51:40,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e58dfbfaf/d884cfa9affd40eeb7d284586c2f27de/FLAG46a1b5cdf [2021-01-06 16:51:41,347 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e58dfbfaf/d884cfa9affd40eeb7d284586c2f27de [2021-01-06 16:51:41,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:51:41,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:51:41,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:51:41,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:51:41,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:51:41,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:51:41" (1/1) ... [2021-01-06 16:51:41,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@454421f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:41, skipping insertion in model container [2021-01-06 16:51:41,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:51:41" (1/1) ... [2021-01-06 16:51:41,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:51:41,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:51:41,549 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-lit/mcmillan2006.i[1009,1022] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] [2021-01-06 16:51:41,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:51:41,583 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:51:41,596 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-lit/mcmillan2006.i[1009,1022] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] [2021-01-06 16:51:41,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:51:41,619 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:51:41,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:41 WrapperNode [2021-01-06 16:51:41,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:51:41,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:51:41,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:51:41,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:51:41,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:41" (1/1) ... [2021-01-06 16:51:41,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:41" (1/1) ... [2021-01-06 16:51:41,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:51:41,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:51:41,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:51:41,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:51:41,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:41" (1/1) ... [2021-01-06 16:51:41,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:41" (1/1) ... [2021-01-06 16:51:41,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:41" (1/1) ... [2021-01-06 16:51:41,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:41" (1/1) ... [2021-01-06 16:51:41,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:41" (1/1) ... [2021-01-06 16:51:41,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:41" (1/1) ... [2021-01-06 16:51:41,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:41" (1/1) ... [2021-01-06 16:51:41,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:51:41,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:51:41,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:51:41,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:51:41,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:41" (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 [2021-01-06 16:51:41,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:51:41,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:51:41,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:51:41,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 16:51:41,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:51:41,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:51:41,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:51:42,218 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:51:42,218 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 16:51:42,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:51:42 BoogieIcfgContainer [2021-01-06 16:51:42,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:51:42,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:51:42,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:51:42,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:51:42,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:51:41" (1/3) ... [2021-01-06 16:51:42,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3f2695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:51:42, skipping insertion in model container [2021-01-06 16:51:42,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:51:41" (2/3) ... [2021-01-06 16:51:42,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3f2695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:51:42, skipping insertion in model container [2021-01-06 16:51:42,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:51:42" (3/3) ... [2021-01-06 16:51:42,246 INFO L111 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2021-01-06 16:51:42,259 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:51:42,264 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:51:42,286 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:51:42,316 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:51:42,317 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:51:42,317 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:51:42,317 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:51:42,317 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:51:42,317 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:51:42,318 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:51:42,318 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:51:42,335 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 16:51:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:51:42,342 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:42,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:42,343 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:42,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:42,351 INFO L82 PathProgramCache]: Analyzing trace with hash 186158361, now seen corresponding path program 1 times [2021-01-06 16:51:42,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:42,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890719056] [2021-01-06 16:51:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:42,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890719056] [2021-01-06 16:51:42,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:51:42,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:51:42,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223514640] [2021-01-06 16:51:42,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:51:42,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:42,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:51:42,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:51:42,559 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2021-01-06 16:51:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:42,577 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2021-01-06 16:51:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:51:42,579 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-01-06 16:51:42,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:42,590 INFO L225 Difference]: With dead ends: 27 [2021-01-06 16:51:42,590 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:51:42,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:51:42,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:51:42,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 16:51:42,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:51:42,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-01-06 16:51:42,639 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-01-06 16:51:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:42,639 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-01-06 16:51:42,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:51:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-01-06 16:51:42,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:51:42,640 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:42,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:42,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:51:42,641 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:42,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:42,642 INFO L82 PathProgramCache]: Analyzing trace with hash 180617235, now seen corresponding path program 1 times [2021-01-06 16:51:42,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:42,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172181823] [2021-01-06 16:51:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:42,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172181823] [2021-01-06 16:51:42,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:51:42,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 16:51:42,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480615604] [2021-01-06 16:51:42,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:51:42,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:42,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:51:42,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:51:42,794 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2021-01-06 16:51:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:42,904 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-01-06 16:51:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:51:42,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 16:51:42,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:42,906 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:51:42,906 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:51:42,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:51:42,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:51:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-01-06 16:51:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:51:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-01-06 16:51:42,912 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2021-01-06 16:51:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:42,913 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-01-06 16:51:42,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:51:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-01-06 16:51:42,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:51:42,914 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:42,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:42,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:51:42,914 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:42,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:42,915 INFO L82 PathProgramCache]: Analyzing trace with hash -875113359, now seen corresponding path program 1 times [2021-01-06 16:51:42,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:42,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207133267] [2021-01-06 16:51:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:43,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207133267] [2021-01-06 16:51:43,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587068962] [2021-01-06 16:51:43,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:43,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:51:43,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:43,475 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-01-06 16:51:43,477 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:51:43,480 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:51:43,481 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:51:43,482 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2021-01-06 16:51:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:43,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:43,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-01-06 16:51:43,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440942059] [2021-01-06 16:51:43,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:51:43,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:43,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:51:43,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:51:43,555 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 11 states. [2021-01-06 16:51:43,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:43,659 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-01-06 16:51:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:51:43,660 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2021-01-06 16:51:43,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:43,660 INFO L225 Difference]: With dead ends: 21 [2021-01-06 16:51:43,661 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 16:51:43,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:51:43,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 16:51:43,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2021-01-06 16:51:43,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 16:51:43,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 16:51:43,667 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-01-06 16:51:43,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:43,667 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 16:51:43,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:51:43,668 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 16:51:43,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:51:43,668 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:43,669 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:43,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:51:43,884 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:43,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:43,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1418361721, now seen corresponding path program 1 times [2021-01-06 16:51:43,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:43,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195048730] [2021-01-06 16:51:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:44,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195048730] [2021-01-06 16:51:44,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831035962] [2021-01-06 16:51:44,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:44,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:51:44,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:44,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:44,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-01-06 16:51:44,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312312851] [2021-01-06 16:51:44,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:51:44,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:44,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:51:44,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:51:44,172 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 10 states. [2021-01-06 16:51:44,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:44,253 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-01-06 16:51:44,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:51:44,253 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-01-06 16:51:44,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:44,254 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:51:44,254 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 16:51:44,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:51:44,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 16:51:44,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-01-06 16:51:44,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:51:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 16:51:44,260 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2021-01-06 16:51:44,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:44,260 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 16:51:44,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:51:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 16:51:44,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:51:44,261 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:44,262 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:44,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:44,476 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:44,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:44,478 INFO L82 PathProgramCache]: Analyzing trace with hash -324855195, now seen corresponding path program 2 times [2021-01-06 16:51:44,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:44,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19988768] [2021-01-06 16:51:44,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:44,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19988768] [2021-01-06 16:51:44,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754183629] [2021-01-06 16:51:44,599 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 [2021-01-06 16:51:44,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:44,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:44,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:51:44,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:44,679 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:51:44,680 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:51:44,686 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:51:44,689 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 16:51:44,690 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2021-01-06 16:51:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:44,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:44,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-01-06 16:51:44,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785978547] [2021-01-06 16:51:44,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:51:44,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:44,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:51:44,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:51:44,773 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 12 states. [2021-01-06 16:51:44,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:44,902 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-01-06 16:51:44,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:51:44,903 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 16:51:44,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:44,904 INFO L225 Difference]: With dead ends: 27 [2021-01-06 16:51:44,904 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 16:51:44,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:51:44,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 16:51:44,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-01-06 16:51:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 16:51:44,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-01-06 16:51:44,911 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2021-01-06 16:51:44,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:44,911 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-01-06 16:51:44,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:51:44,912 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-01-06 16:51:44,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:51:44,912 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:44,913 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:45,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:45,128 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:45,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:45,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1610985595, now seen corresponding path program 3 times [2021-01-06 16:51:45,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:45,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70174247] [2021-01-06 16:51:45,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:45,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70174247] [2021-01-06 16:51:45,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111656708] [2021-01-06 16:51:45,253 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 [2021-01-06 16:51:45,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 16:51:45,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:45,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:51:45,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:45,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:45,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-01-06 16:51:45,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842322544] [2021-01-06 16:51:45,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:51:45,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:45,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:51:45,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:51:45,424 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 13 states. [2021-01-06 16:51:45,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:45,541 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-01-06 16:51:45,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:51:45,541 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2021-01-06 16:51:45,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:45,542 INFO L225 Difference]: With dead ends: 40 [2021-01-06 16:51:45,542 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 16:51:45,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:51:45,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 16:51:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-01-06 16:51:45,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 16:51:45,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-01-06 16:51:45,548 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2021-01-06 16:51:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:45,549 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-01-06 16:51:45,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:51:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-01-06 16:51:45,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:51:45,550 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:45,550 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:45,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:45,766 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:45,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:45,768 INFO L82 PathProgramCache]: Analyzing trace with hash 731310041, now seen corresponding path program 4 times [2021-01-06 16:51:45,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:45,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194737337] [2021-01-06 16:51:45,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:45,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194737337] [2021-01-06 16:51:45,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015858808] [2021-01-06 16:51:45,935 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 [2021-01-06 16:51:45,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:45,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:45,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:51:45,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:46,074 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:51:46,075 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:51:46,080 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:51:46,081 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:51:46,082 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 16:51:46,388 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:51:46,394 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:51:46,398 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:51:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:46,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:46,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-01-06 16:51:46,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565942544] [2021-01-06 16:51:46,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:51:46,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:46,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:51:46,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:51:46,430 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 21 states. [2021-01-06 16:51:47,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:47,332 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-01-06 16:51:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:51:47,332 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2021-01-06 16:51:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:47,333 INFO L225 Difference]: With dead ends: 49 [2021-01-06 16:51:47,333 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 16:51:47,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:51:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 16:51:47,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-01-06 16:51:47,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 16:51:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-01-06 16:51:47,343 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 22 [2021-01-06 16:51:47,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:47,343 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-01-06 16:51:47,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:51:47,343 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-01-06 16:51:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:51:47,344 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:47,344 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:47,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:51:47,558 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:47,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:47,559 INFO L82 PathProgramCache]: Analyzing trace with hash 985881805, now seen corresponding path program 5 times [2021-01-06 16:51:47,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:47,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674913480] [2021-01-06 16:51:47,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:47,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674913480] [2021-01-06 16:51:47,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906618250] [2021-01-06 16:51:47,774 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 [2021-01-06 16:51:47,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 16:51:47,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:47,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:51:47,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:47,935 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 16:51:47,936 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:51:47,941 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:51:47,942 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:51:47,942 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2021-01-06 16:51:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:48,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:48,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-01-06 16:51:48,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568625834] [2021-01-06 16:51:48,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:51:48,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:48,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:51:48,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:51:48,138 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 23 states. [2021-01-06 16:51:48,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:48,562 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-01-06 16:51:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:51:48,563 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 28 [2021-01-06 16:51:48,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:48,566 INFO L225 Difference]: With dead ends: 39 [2021-01-06 16:51:48,566 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 16:51:48,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:51:48,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 16:51:48,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-01-06 16:51:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 16:51:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-01-06 16:51:48,586 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2021-01-06 16:51:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:48,590 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-01-06 16:51:48,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:51:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-01-06 16:51:48,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:51:48,592 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:48,592 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:48,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:48,807 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:48,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:48,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1173257955, now seen corresponding path program 6 times [2021-01-06 16:51:48,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:48,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187814265] [2021-01-06 16:51:48,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:48,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187814265] [2021-01-06 16:51:48,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152084585] [2021-01-06 16:51:48,989 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 [2021-01-06 16:51:49,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 16:51:49,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:49,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:51:49,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:49,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:49,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-01-06 16:51:49,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130370339] [2021-01-06 16:51:49,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:51:49,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:49,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:51:49,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:51:49,212 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2021-01-06 16:51:49,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:49,424 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-01-06 16:51:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:51:49,424 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2021-01-06 16:51:49,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:49,429 INFO L225 Difference]: With dead ends: 60 [2021-01-06 16:51:49,430 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 16:51:49,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:51:49,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 16:51:49,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-01-06 16:51:49,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 16:51:49,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-01-06 16:51:49,450 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2021-01-06 16:51:49,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:49,451 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-01-06 16:51:49,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:51:49,451 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-01-06 16:51:49,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:51:49,456 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:49,456 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:49,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:49,671 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:49,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:49,672 INFO L82 PathProgramCache]: Analyzing trace with hash -92169919, now seen corresponding path program 7 times [2021-01-06 16:51:49,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:49,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607779140] [2021-01-06 16:51:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:49,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607779140] [2021-01-06 16:51:49,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061702485] [2021-01-06 16:51:49,942 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 [2021-01-06 16:51:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:50,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:51:50,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:50,042 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:51:50,043 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:51:50,049 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:51:50,052 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 16:51:50,052 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2021-01-06 16:51:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:50,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:50,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 20 [2021-01-06 16:51:50,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301829599] [2021-01-06 16:51:50,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:51:50,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:50,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:51:50,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:51:50,244 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 20 states. [2021-01-06 16:51:50,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:50,654 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-01-06 16:51:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:51:50,655 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 34 [2021-01-06 16:51:50,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:50,655 INFO L225 Difference]: With dead ends: 45 [2021-01-06 16:51:50,656 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 16:51:50,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:51:50,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 16:51:50,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2021-01-06 16:51:50,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:51:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-01-06 16:51:50,665 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2021-01-06 16:51:50,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:50,666 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-01-06 16:51:50,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:51:50,666 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-01-06 16:51:50,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:51:50,667 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:50,667 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:50,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:51:50,882 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:50,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:50,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1251041623, now seen corresponding path program 8 times [2021-01-06 16:51:50,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:50,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996221168] [2021-01-06 16:51:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:51,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996221168] [2021-01-06 16:51:51,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211275942] [2021-01-06 16:51:51,034 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 [2021-01-06 16:51:51,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:51,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:51:51,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:51,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:51,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-01-06 16:51:51,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547518904] [2021-01-06 16:51:51,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:51:51,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:51,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:51:51,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:51:51,316 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 22 states. [2021-01-06 16:51:51,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:51,534 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-01-06 16:51:51,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:51:51,536 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2021-01-06 16:51:51,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:51,537 INFO L225 Difference]: With dead ends: 70 [2021-01-06 16:51:51,537 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:51:51,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:51:51,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:51:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-01-06 16:51:51,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 16:51:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-01-06 16:51:51,559 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2021-01-06 16:51:51,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:51,560 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-01-06 16:51:51,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:51:51,560 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-01-06 16:51:51,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 16:51:51,561 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:51,561 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:51,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:51,776 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:51,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:51,777 INFO L82 PathProgramCache]: Analyzing trace with hash -747455179, now seen corresponding path program 9 times [2021-01-06 16:51:51,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:51,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556842194] [2021-01-06 16:51:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:52,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556842194] [2021-01-06 16:51:52,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589282216] [2021-01-06 16:51:52,076 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 [2021-01-06 16:51:52,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 16:51:52,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:52,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:51:52,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:52,328 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:51:52,329 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:51:52,333 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:51:52,340 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:51:52,344 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 16:51:52,926 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:51:52,930 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:51:52,932 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:51:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 45 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:52,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:52,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-01-06 16:51:52,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583056645] [2021-01-06 16:51:52,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:51:52,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:52,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:51:52,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:51:52,978 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 33 states. [2021-01-06 16:51:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:54,979 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2021-01-06 16:51:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 16:51:54,980 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2021-01-06 16:51:54,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:54,981 INFO L225 Difference]: With dead ends: 79 [2021-01-06 16:51:54,981 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 16:51:54,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=494, Invalid=4476, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:51:54,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 16:51:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2021-01-06 16:51:54,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:51:54,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-01-06 16:51:54,993 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 40 [2021-01-06 16:51:54,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:54,993 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-01-06 16:51:54,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:51:54,993 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-01-06 16:51:54,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:51:54,994 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:54,994 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:55,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:55,208 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:55,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:55,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1870665559, now seen corresponding path program 10 times [2021-01-06 16:51:55,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:55,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205925569] [2021-01-06 16:51:55,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:55,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205925569] [2021-01-06 16:51:55,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087767860] [2021-01-06 16:51:55,582 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 [2021-01-06 16:51:55,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:55,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:55,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:51:55,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:55,861 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:51:55,862 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:51:55,867 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:51:55,868 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:51:55,868 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 16:51:56,579 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:51:56,582 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:51:56,583 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:51:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:56,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:56,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-01-06 16:51:56,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153958130] [2021-01-06 16:51:56,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:51:56,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:56,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:51:56,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:51:56,635 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 37 states. [2021-01-06 16:51:59,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:59,081 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-01-06 16:51:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 16:51:59,081 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 46 [2021-01-06 16:51:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:59,082 INFO L225 Difference]: With dead ends: 89 [2021-01-06 16:51:59,083 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 16:51:59,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=593, Invalid=5887, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:51:59,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 16:51:59,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2021-01-06 16:51:59,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 16:51:59,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-01-06 16:51:59,098 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 46 [2021-01-06 16:51:59,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:59,098 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-01-06 16:51:59,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:51:59,098 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-01-06 16:51:59,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 16:51:59,099 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:59,099 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:59,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:51:59,313 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:59,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:59,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1193657443, now seen corresponding path program 11 times [2021-01-06 16:51:59,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:59,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841649326] [2021-01-06 16:51:59,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:59,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841649326] [2021-01-06 16:51:59,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679513088] [2021-01-06 16:51:59,709 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 [2021-01-06 16:51:59,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 16:51:59,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:59,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 16:51:59,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:59,871 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:51:59,872 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:51:59,878 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:51:59,880 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 16:51:59,880 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2021-01-06 16:52:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:00,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:00,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 29 [2021-01-06 16:52:00,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19794257] [2021-01-06 16:52:00,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:52:00,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:00,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:52:00,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:52:00,256 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 29 states. [2021-01-06 16:52:01,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:01,188 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2021-01-06 16:52:01,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:52:01,189 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 52 [2021-01-06 16:52:01,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:01,189 INFO L225 Difference]: With dead ends: 63 [2021-01-06 16:52:01,190 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 16:52:01,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:52:01,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 16:52:01,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2021-01-06 16:52:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 16:52:01,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-01-06 16:52:01,199 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2021-01-06 16:52:01,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:01,200 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-01-06 16:52:01,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:52:01,200 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-01-06 16:52:01,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 16:52:01,201 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:01,201 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:01,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:52:01,407 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:01,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:01,408 INFO L82 PathProgramCache]: Analyzing trace with hash 215578035, now seen corresponding path program 12 times [2021-01-06 16:52:01,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:01,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659578747] [2021-01-06 16:52:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 99 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:01,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659578747] [2021-01-06 16:52:01,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53905963] [2021-01-06 16:52:01,685 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 [2021-01-06 16:52:01,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 16:52:01,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:01,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:52:01,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 128 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:02,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:02,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-01-06 16:52:02,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634829769] [2021-01-06 16:52:02,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:52:02,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:02,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:52:02,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:52:02,260 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 31 states. [2021-01-06 16:52:02,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:02,638 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-01-06 16:52:02,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:52:02,638 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2021-01-06 16:52:02,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:02,639 INFO L225 Difference]: With dead ends: 100 [2021-01-06 16:52:02,640 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 16:52:02,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=374, Invalid=1266, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:52:02,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 16:52:02,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-01-06 16:52:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 16:52:02,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-01-06 16:52:02,650 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2021-01-06 16:52:02,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:02,651 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-01-06 16:52:02,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:52:02,651 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-01-06 16:52:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 16:52:02,652 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:02,652 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:02,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:52:02,866 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:02,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1778046481, now seen corresponding path program 13 times [2021-01-06 16:52:02,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:02,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489288871] [2021-01-06 16:52:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:03,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489288871] [2021-01-06 16:52:03,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298725197] [2021-01-06 16:52:03,391 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 [2021-01-06 16:52:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:03,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:52:03,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:03,503 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:52:03,504 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:52:03,510 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:52:03,512 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 16:52:03,512 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2021-01-06 16:52:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:03,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:03,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 32 [2021-01-06 16:52:03,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695023537] [2021-01-06 16:52:03,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:52:03,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:03,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:52:03,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:52:03,975 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 32 states. [2021-01-06 16:52:05,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:05,082 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-01-06 16:52:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:52:05,083 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 58 [2021-01-06 16:52:05,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:05,083 INFO L225 Difference]: With dead ends: 69 [2021-01-06 16:52:05,084 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 16:52:05,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=163, Invalid=1729, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:52:05,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 16:52:05,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2021-01-06 16:52:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 16:52:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-01-06 16:52:05,095 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2021-01-06 16:52:05,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:05,095 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-01-06 16:52:05,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:52:05,095 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-01-06 16:52:05,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 16:52:05,096 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:05,097 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:05,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:05,311 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:05,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:05,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1367362009, now seen corresponding path program 14 times [2021-01-06 16:52:05,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:05,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600791869] [2021-01-06 16:52:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 129 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:05,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600791869] [2021-01-06 16:52:05,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791208461] [2021-01-06 16:52:05,610 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 [2021-01-06 16:52:05,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:05,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:05,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:52:05,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 162 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:06,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:06,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2021-01-06 16:52:06,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329034770] [2021-01-06 16:52:06,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:52:06,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:06,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:52:06,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:52:06,094 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 34 states. [2021-01-06 16:52:06,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:06,531 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2021-01-06 16:52:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:52:06,531 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 62 [2021-01-06 16:52:06,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:06,532 INFO L225 Difference]: With dead ends: 110 [2021-01-06 16:52:06,532 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 16:52:06,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1531, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:52:06,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 16:52:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-01-06 16:52:06,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 16:52:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-01-06 16:52:06,542 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2021-01-06 16:52:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:06,542 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-01-06 16:52:06,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:52:06,543 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-01-06 16:52:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 16:52:06,543 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:06,543 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:06,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:52:06,744 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:06,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1314727931, now seen corresponding path program 15 times [2021-01-06 16:52:06,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:06,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550929512] [2021-01-06 16:52:06,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:07,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550929512] [2021-01-06 16:52:07,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457887330] [2021-01-06 16:52:07,244 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 [2021-01-06 16:52:07,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-06 16:52:07,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:07,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 16:52:07,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:07,781 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:52:07,783 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:52:07,787 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:52:07,787 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:52:07,788 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 16:52:08,877 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:52:08,879 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:52:08,881 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:52:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 153 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:08,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:08,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2021-01-06 16:52:08,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359925380] [2021-01-06 16:52:08,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 16:52:08,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:08,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 16:52:08,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2093, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:52:08,953 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 49 states. [2021-01-06 16:52:13,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:13,187 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2021-01-06 16:52:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 16:52:13,187 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 64 [2021-01-06 16:52:13,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:13,188 INFO L225 Difference]: With dead ends: 119 [2021-01-06 16:52:13,188 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 16:52:13,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2771 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=932, Invalid=11278, Unknown=0, NotChecked=0, Total=12210 [2021-01-06 16:52:13,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 16:52:13,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-01-06 16:52:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 16:52:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-01-06 16:52:13,201 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 64 [2021-01-06 16:52:13,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:13,201 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-01-06 16:52:13,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 16:52:13,201 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-01-06 16:52:13,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 16:52:13,202 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:13,202 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:13,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:52:13,415 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:13,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:13,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1742430585, now seen corresponding path program 16 times [2021-01-06 16:52:13,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:13,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722633153] [2021-01-06 16:52:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:14,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722633153] [2021-01-06 16:52:14,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821875833] [2021-01-06 16:52:14,023 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 [2021-01-06 16:52:14,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:14,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:14,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 16:52:14,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:14,949 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:52:14,949 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:52:14,954 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:52:14,954 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:52:14,955 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 16:52:16,248 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:52:16,249 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:52:16,250 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:52:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 190 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:16,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:16,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 53 [2021-01-06 16:52:16,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506505713] [2021-01-06 16:52:16,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 16:52:16,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:16,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 16:52:16,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2457, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:52:16,334 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 53 states. [2021-01-06 16:52:21,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:21,407 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2021-01-06 16:52:21,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-01-06 16:52:21,407 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 70 [2021-01-06 16:52:21,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:21,408 INFO L225 Difference]: With dead ends: 129 [2021-01-06 16:52:21,408 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 16:52:21,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3310 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1059, Invalid=13461, Unknown=0, NotChecked=0, Total=14520 [2021-01-06 16:52:21,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 16:52:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2021-01-06 16:52:21,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 16:52:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-01-06 16:52:21,421 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 70 [2021-01-06 16:52:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:21,421 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-01-06 16:52:21,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 16:52:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-01-06 16:52:21,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 16:52:21,422 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:21,422 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:21,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:21,623 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:21,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1997172115, now seen corresponding path program 17 times [2021-01-06 16:52:21,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:21,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696682394] [2021-01-06 16:52:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:22,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696682394] [2021-01-06 16:52:22,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927711711] [2021-01-06 16:52:22,354 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 [2021-01-06 16:52:22,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-01-06 16:52:22,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:22,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 16:52:22,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:22,571 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:52:22,576 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:52:22,582 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:52:22,583 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 16:52:22,583 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2021-01-06 16:52:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:23,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:23,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 41 [2021-01-06 16:52:23,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91775196] [2021-01-06 16:52:23,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:52:23,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:23,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:52:23,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1535, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:52:23,362 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 41 states. [2021-01-06 16:52:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:25,092 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2021-01-06 16:52:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:52:25,093 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 76 [2021-01-06 16:52:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:25,093 INFO L225 Difference]: With dead ends: 87 [2021-01-06 16:52:25,093 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 16:52:25,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=208, Invalid=2872, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:52:25,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 16:52:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2021-01-06 16:52:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 16:52:25,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-01-06 16:52:25,105 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2021-01-06 16:52:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:25,105 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-01-06 16:52:25,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:52:25,106 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-01-06 16:52:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 16:52:25,106 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:25,106 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:25,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:25,307 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash 516744323, now seen corresponding path program 18 times [2021-01-06 16:52:25,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:25,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965116074] [2021-01-06 16:52:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 243 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:25,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965116074] [2021-01-06 16:52:25,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703719492] [2021-01-06 16:52:25,757 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 [2021-01-06 16:52:26,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 16:52:26,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:26,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:52:26,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 288 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:26,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:26,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2021-01-06 16:52:26,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473026934] [2021-01-06 16:52:26,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:52:26,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:26,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:52:26,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:52:26,681 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 43 states. [2021-01-06 16:52:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:27,385 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2021-01-06 16:52:27,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:52:27,386 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 80 [2021-01-06 16:52:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:27,387 INFO L225 Difference]: With dead ends: 140 [2021-01-06 16:52:27,387 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 16:52:27,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=716, Invalid=2476, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:52:27,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 16:52:27,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-01-06 16:52:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 16:52:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-01-06 16:52:27,400 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2021-01-06 16:52:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:27,400 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-01-06 16:52:27,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:52:27,400 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-01-06 16:52:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 16:52:27,401 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:27,401 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:27,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:27,610 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:27,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:27,611 INFO L82 PathProgramCache]: Analyzing trace with hash 260737761, now seen corresponding path program 19 times [2021-01-06 16:52:27,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:27,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465237415] [2021-01-06 16:52:27,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:28,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465237415] [2021-01-06 16:52:28,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849405219] [2021-01-06 16:52:28,802 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 [2021-01-06 16:52:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:28,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 16:52:28,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:29,431 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-01-06 16:52:29,432 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:52:29,434 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:52:29,435 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:52:29,435 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2021-01-06 16:52:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:30,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:30,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 59 [2021-01-06 16:52:30,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196104157] [2021-01-06 16:52:30,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-01-06 16:52:30,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:30,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-01-06 16:52:30,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3236, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:52:30,417 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 59 states. [2021-01-06 16:52:33,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:33,210 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2021-01-06 16:52:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 16:52:33,215 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 82 [2021-01-06 16:52:33,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:33,216 INFO L225 Difference]: With dead ends: 93 [2021-01-06 16:52:33,217 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 16:52:33,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=313, Invalid=5237, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:52:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 16:52:33,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2021-01-06 16:52:33,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 16:52:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-01-06 16:52:33,231 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2021-01-06 16:52:33,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:33,231 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-01-06 16:52:33,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2021-01-06 16:52:33,231 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-01-06 16:52:33,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 16:52:33,232 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:33,232 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:33,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:52:33,447 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:33,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:33,448 INFO L82 PathProgramCache]: Analyzing trace with hash -393706761, now seen corresponding path program 20 times [2021-01-06 16:52:33,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:33,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269363785] [2021-01-06 16:52:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 289 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:34,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269363785] [2021-01-06 16:52:34,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300773935] [2021-01-06 16:52:34,006 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 [2021-01-06 16:52:34,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:34,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:34,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:52:34,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 338 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:34,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:34,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2021-01-06 16:52:34,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063151063] [2021-01-06 16:52:34,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 16:52:34,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:34,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 16:52:34,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1600, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:52:34,861 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 46 states. [2021-01-06 16:52:35,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:35,663 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2021-01-06 16:52:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:52:35,663 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 86 [2021-01-06 16:52:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:35,664 INFO L225 Difference]: With dead ends: 150 [2021-01-06 16:52:35,665 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 16:52:35,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=819, Invalid=2841, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:52:35,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 16:52:35,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-01-06 16:52:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 16:52:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-01-06 16:52:35,679 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2021-01-06 16:52:35,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:35,679 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-01-06 16:52:35,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 16:52:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-01-06 16:52:35,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 16:52:35,680 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:35,680 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:35,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 16:52:35,895 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:35,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:35,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1316711125, now seen corresponding path program 21 times [2021-01-06 16:52:35,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:35,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766197785] [2021-01-06 16:52:35,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:36,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766197785] [2021-01-06 16:52:36,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553860547] [2021-01-06 16:52:36,870 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 [2021-01-06 16:52:37,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-01-06 16:52:37,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:37,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:52:37,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:38,179 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:52:38,180 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:52:38,185 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:52:38,186 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:52:38,186 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 16:52:40,321 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:52:40,323 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:52:40,324 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:52:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 325 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:40,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:40,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 65 [2021-01-06 16:52:40,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335813859] [2021-01-06 16:52:40,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-01-06 16:52:40,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:40,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-01-06 16:52:40,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=3723, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 16:52:40,442 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 65 states. [2021-01-06 16:52:48,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:48,377 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2021-01-06 16:52:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-01-06 16:52:48,377 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 88 [2021-01-06 16:52:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:48,378 INFO L225 Difference]: With dead ends: 159 [2021-01-06 16:52:48,378 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 16:52:48,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5215 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1482, Invalid=21168, Unknown=0, NotChecked=0, Total=22650 [2021-01-06 16:52:48,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 16:52:48,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-01-06 16:52:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 16:52:48,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2021-01-06 16:52:48,394 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 88 [2021-01-06 16:52:48,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:48,394 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2021-01-06 16:52:48,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2021-01-06 16:52:48,394 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2021-01-06 16:52:48,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 16:52:48,395 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:48,395 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:48,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:48,603 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:48,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:48,604 INFO L82 PathProgramCache]: Analyzing trace with hash -890154423, now seen corresponding path program 22 times [2021-01-06 16:52:48,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:48,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939218784] [2021-01-06 16:52:48,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:49,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939218784] [2021-01-06 16:52:49,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605474160] [2021-01-06 16:52:49,746 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 [2021-01-06 16:52:50,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:50,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:50,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:52:50,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:51,506 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:52:51,506 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:52:51,511 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:52:51,512 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:52:51,512 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 16:52:53,908 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:52:53,910 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:52:53,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:52:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 378 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:54,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:54,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 69 [2021-01-06 16:52:54,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326926642] [2021-01-06 16:52:54,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-01-06 16:52:54,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:54,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-01-06 16:52:54,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=4203, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:52:54,040 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 69 states. [2021-01-06 16:53:03,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:03,976 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2021-01-06 16:53:03,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-01-06 16:53:03,976 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 94 [2021-01-06 16:53:03,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:03,978 INFO L225 Difference]: With dead ends: 169 [2021-01-06 16:53:03,978 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 16:53:03,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5946 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1637, Invalid=24123, Unknown=0, NotChecked=0, Total=25760 [2021-01-06 16:53:03,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 16:53:03,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2021-01-06 16:53:03,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 16:53:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-01-06 16:53:03,993 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 94 [2021-01-06 16:53:03,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:03,994 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-01-06 16:53:03,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2021-01-06 16:53:03,994 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-01-06 16:53:03,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 16:53:03,995 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:03,995 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:04,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 16:53:04,206 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:04,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:04,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1772265155, now seen corresponding path program 23 times [2021-01-06 16:53:04,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:04,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215040080] [2021-01-06 16:53:04,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:05,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215040080] [2021-01-06 16:53:05,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847675571] [2021-01-06 16:53:05,632 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 [2021-01-06 16:53:06,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-01-06 16:53:06,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:06,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 70 conjunts are in the unsatisfiable core [2021-01-06 16:53:06,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:06,128 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:53:06,129 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:53:06,138 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:53:06,139 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 16:53:06,139 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2021-01-06 16:53:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:07,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:07,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 53 [2021-01-06 16:53:07,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923799924] [2021-01-06 16:53:07,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 16:53:07,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:07,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 16:53:07,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2619, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:53:07,708 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 53 states. [2021-01-06 16:53:11,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:11,050 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2021-01-06 16:53:11,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 16:53:11,051 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 100 [2021-01-06 16:53:11,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:11,052 INFO L225 Difference]: With dead ends: 111 [2021-01-06 16:53:11,052 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 16:53:11,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=268, Invalid=4844, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 16:53:11,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 16:53:11,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-01-06 16:53:11,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 16:53:11,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-01-06 16:53:11,069 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2021-01-06 16:53:11,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:11,069 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-01-06 16:53:11,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 16:53:11,069 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-01-06 16:53:11,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-01-06 16:53:11,070 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:11,070 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:11,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:11,276 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:11,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:11,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2096051373, now seen corresponding path program 24 times [2021-01-06 16:53:11,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:11,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87050223] [2021-01-06 16:53:11,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 451 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:12,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87050223] [2021-01-06 16:53:12,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24873052] [2021-01-06 16:53:12,255 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 [2021-01-06 16:53:13,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-01-06 16:53:13,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:13,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:53:13,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 512 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:14,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:14,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2021-01-06 16:53:14,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641650908] [2021-01-06 16:53:14,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 16:53:14,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:14,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 16:53:14,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=2299, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:53:14,488 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 55 states. [2021-01-06 16:53:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:15,752 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2021-01-06 16:53:15,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:53:15,752 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 104 [2021-01-06 16:53:15,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:15,753 INFO L225 Difference]: With dead ends: 180 [2021-01-06 16:53:15,753 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 16:53:15,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1170, Invalid=4086, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 16:53:15,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 16:53:15,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-01-06 16:53:15,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 16:53:15,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2021-01-06 16:53:15,766 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2021-01-06 16:53:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:15,766 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2021-01-06 16:53:15,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 16:53:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2021-01-06 16:53:15,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 16:53:15,767 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:15,767 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:15,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:53:15,974 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:15,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:15,974 INFO L82 PathProgramCache]: Analyzing trace with hash 678999985, now seen corresponding path program 25 times [2021-01-06 16:53:15,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:15,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178329930] [2021-01-06 16:53:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:17,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178329930] [2021-01-06 16:53:17,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687238828] [2021-01-06 16:53:17,479 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 [2021-01-06 16:53:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:17,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 74 conjunts are in the unsatisfiable core [2021-01-06 16:53:17,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:17,643 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:53:17,645 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:53:17,653 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:53:17,655 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 16:53:17,655 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2021-01-06 16:53:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:19,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:19,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 56 [2021-01-06 16:53:19,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013151110] [2021-01-06 16:53:19,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 16:53:19,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:19,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 16:53:19,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2935, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:53:19,346 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 56 states. [2021-01-06 16:53:23,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:23,012 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2021-01-06 16:53:23,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-06 16:53:23,014 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 106 [2021-01-06 16:53:23,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:23,015 INFO L225 Difference]: With dead ends: 117 [2021-01-06 16:53:23,015 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 16:53:23,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=283, Invalid=5417, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 16:53:23,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 16:53:23,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2021-01-06 16:53:23,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 16:53:23,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-01-06 16:53:23,033 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2021-01-06 16:53:23,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:23,034 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-01-06 16:53:23,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 16:53:23,034 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-01-06 16:53:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 16:53:23,034 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:23,035 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:23,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:53:23,246 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:23,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:23,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1374930887, now seen corresponding path program 26 times [2021-01-06 16:53:23,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:23,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297100900] [2021-01-06 16:53:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 513 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:24,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297100900] [2021-01-06 16:53:24,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308196025] [2021-01-06 16:53:24,178 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 [2021-01-06 16:53:24,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:53:24,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:24,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 16:53:24,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 578 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:25,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:25,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2021-01-06 16:53:25,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363473141] [2021-01-06 16:53:25,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 16:53:25,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:25,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 16:53:25,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=2560, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:53:25,608 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 58 states. [2021-01-06 16:53:26,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:26,837 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2021-01-06 16:53:26,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:53:26,837 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 110 [2021-01-06 16:53:26,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:26,838 INFO L225 Difference]: With dead ends: 190 [2021-01-06 16:53:26,839 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 16:53:26,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1301, Invalid=4551, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 16:53:26,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 16:53:26,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-01-06 16:53:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 16:53:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2021-01-06 16:53:26,854 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2021-01-06 16:53:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:26,854 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2021-01-06 16:53:26,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2021-01-06 16:53:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2021-01-06 16:53:26,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 16:53:26,855 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:26,855 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:27,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:53:27,060 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:27,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:27,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1186695771, now seen corresponding path program 27 times [2021-01-06 16:53:27,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:27,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349990782] [2021-01-06 16:53:27,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:28,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349990782] [2021-01-06 16:53:28,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125810676] [2021-01-06 16:53:28,675 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 [2021-01-06 16:53:29,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-01-06 16:53:29,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:29,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 16:53:29,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:31,192 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:53:31,193 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:53:31,204 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:53:31,205 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:53:31,205 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 16:53:34,572 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:53:34,573 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:53:34,573 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:53:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 561 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:34,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:34,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 81 [2021-01-06 16:53:34,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885757079] [2021-01-06 16:53:34,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-01-06 16:53:34,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:34,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-01-06 16:53:34,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=5817, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:53:34,744 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 81 states. [2021-01-06 16:53:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:48,091 INFO L93 Difference]: Finished difference Result 199 states and 202 transitions. [2021-01-06 16:53:48,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-01-06 16:53:48,092 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 112 [2021-01-06 16:53:48,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:48,093 INFO L225 Difference]: With dead ends: 199 [2021-01-06 16:53:48,093 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 16:53:48,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8427 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=2144, Invalid=34146, Unknown=0, NotChecked=0, Total=36290 [2021-01-06 16:53:48,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 16:53:48,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2021-01-06 16:53:48,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 16:53:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2021-01-06 16:53:48,115 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 112 [2021-01-06 16:53:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:48,115 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2021-01-06 16:53:48,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2021-01-06 16:53:48,115 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2021-01-06 16:53:48,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 16:53:48,116 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:48,116 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:48,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:48,324 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:48,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:48,325 INFO L82 PathProgramCache]: Analyzing trace with hash 453622553, now seen corresponding path program 28 times [2021-01-06 16:53:48,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:48,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376039263] [2021-01-06 16:53:48,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 1009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:50,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376039263] [2021-01-06 16:53:50,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672885976] [2021-01-06 16:53:50,244 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 [2021-01-06 16:53:52,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:53:52,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:52,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 16:53:52,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:54,293 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:53:54,294 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:53:54,300 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:53:54,301 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:53:54,302 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 16:53:58,359 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:53:58,361 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:53:58,362 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:53:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 630 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:58,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:58,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44] total 85 [2021-01-06 16:53:58,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680507135] [2021-01-06 16:53:58,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-01-06 16:53:58,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:58,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-01-06 16:53:58,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=727, Invalid=6413, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 16:53:58,568 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 85 states. [2021-01-06 16:54:15,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:15,828 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2021-01-06 16:54:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-01-06 16:54:15,830 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 118 [2021-01-06 16:54:15,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:15,831 INFO L225 Difference]: With dead ends: 209 [2021-01-06 16:54:15,831 INFO L226 Difference]: Without dead ends: 129 [2021-01-06 16:54:15,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9350 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=2327, Invalid=37873, Unknown=0, NotChecked=0, Total=40200 [2021-01-06 16:54:15,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-01-06 16:54:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2021-01-06 16:54:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 16:54:15,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-01-06 16:54:15,860 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 118 [2021-01-06 16:54:15,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:15,860 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-01-06 16:54:15,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2021-01-06 16:54:15,860 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-01-06 16:54:15,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-01-06 16:54:15,861 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:15,861 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:16,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 16:54:16,069 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:16,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:16,070 INFO L82 PathProgramCache]: Analyzing trace with hash 341420045, now seen corresponding path program 29 times [2021-01-06 16:54:16,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:16,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965625346] [2021-01-06 16:54:16,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:18,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965625346] [2021-01-06 16:54:18,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121497970] [2021-01-06 16:54:18,468 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 [2021-01-06 16:54:19,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-01-06 16:54:19,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:19,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 86 conjunts are in the unsatisfiable core [2021-01-06 16:54:19,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:19,404 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:54:19,405 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:54:19,416 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:54:19,418 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 16:54:19,418 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2021-01-06 16:54:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:22,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:22,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 65 [2021-01-06 16:54:22,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064076317] [2021-01-06 16:54:22,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-01-06 16:54:22,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:22,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-01-06 16:54:22,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3991, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 16:54:22,288 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 65 states. [2021-01-06 16:54:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:29,853 INFO L93 Difference]: Finished difference Result 135 states and 136 transitions. [2021-01-06 16:54:29,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 16:54:29,855 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 124 [2021-01-06 16:54:29,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:29,856 INFO L225 Difference]: With dead ends: 135 [2021-01-06 16:54:29,856 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 16:54:29,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=328, Invalid=7328, Unknown=0, NotChecked=0, Total=7656 [2021-01-06 16:54:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 16:54:29,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2021-01-06 16:54:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2021-01-06 16:54:29,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-01-06 16:54:29,877 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2021-01-06 16:54:29,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:29,877 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-01-06 16:54:29,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2021-01-06 16:54:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-01-06 16:54:29,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-01-06 16:54:29,878 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:29,878 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:30,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:30,079 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:30,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:30,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1997723101, now seen corresponding path program 30 times [2021-01-06 16:54:30,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:30,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014541789] [2021-01-06 16:54:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 723 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:31,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014541789] [2021-01-06 16:54:31,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948708349] [2021-01-06 16:54:31,828 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 [2021-01-06 16:54:34,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-01-06 16:54:34,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:34,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 16:54:34,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 800 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:37,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:37,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2021-01-06 16:54:37,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775512508] [2021-01-06 16:54:37,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-01-06 16:54:37,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:37,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-01-06 16:54:37,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=3427, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:54:37,334 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 67 states. [2021-01-06 16:54:39,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:39,705 INFO L93 Difference]: Finished difference Result 220 states and 222 transitions. [2021-01-06 16:54:39,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 16:54:39,705 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 128 [2021-01-06 16:54:39,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:39,706 INFO L225 Difference]: With dead ends: 220 [2021-01-06 16:54:39,706 INFO L226 Difference]: Without dead ends: 132 [2021-01-06 16:54:39,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1736, Invalid=6096, Unknown=0, NotChecked=0, Total=7832 [2021-01-06 16:54:39,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-01-06 16:54:39,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-01-06 16:54:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 16:54:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2021-01-06 16:54:39,733 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2021-01-06 16:54:39,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:39,733 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2021-01-06 16:54:39,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2021-01-06 16:54:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2021-01-06 16:54:39,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 16:54:39,734 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:39,734 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:39,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 16:54:39,948 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:39,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:39,949 INFO L82 PathProgramCache]: Analyzing trace with hash 973954177, now seen corresponding path program 31 times [2021-01-06 16:54:39,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:39,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185146996] [2021-01-06 16:54:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:42,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185146996] [2021-01-06 16:54:42,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141317086] [2021-01-06 16:54:42,729 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:42,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 90 conjunts are in the unsatisfiable core [2021-01-06 16:54:42,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:42,973 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:54:42,975 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:54:42,987 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:54:42,988 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-06 16:54:42,989 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2021-01-06 16:54:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:46,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:46,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 68 [2021-01-06 16:54:46,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104096923] [2021-01-06 16:54:46,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-01-06 16:54:46,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:46,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-01-06 16:54:46,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=4379, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 16:54:46,457 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 68 states. [2021-01-06 16:54:54,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:54,932 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2021-01-06 16:54:54,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 16:54:54,933 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 130 [2021-01-06 16:54:54,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:54,934 INFO L225 Difference]: With dead ends: 141 [2021-01-06 16:54:54,935 INFO L226 Difference]: Without dead ends: 139 [2021-01-06 16:54:54,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=343, Invalid=8029, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 16:54:54,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-01-06 16:54:54,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2021-01-06 16:54:54,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-01-06 16:54:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-01-06 16:54:54,959 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2021-01-06 16:54:54,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:54,959 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-01-06 16:54:54,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2021-01-06 16:54:54,959 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-01-06 16:54:54,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-01-06 16:54:54,960 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:54,960 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:55,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 16:54:55,174 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:55,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:55,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1945533289, now seen corresponding path program 32 times [2021-01-06 16:54:55,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:55,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719421671] [2021-01-06 16:54:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 801 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:57,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719421671] [2021-01-06 16:54:57,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192391214] [2021-01-06 16:54:57,208 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:57,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:54:57,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:57,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 16:54:57,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 882 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:59,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:59,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2021-01-06 16:54:59,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548039811] [2021-01-06 16:54:59,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-01-06 16:54:59,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:59,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-01-06 16:54:59,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=3744, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:54:59,893 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 70 states. [2021-01-06 16:55:02,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:02,871 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2021-01-06 16:55:02,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:55:02,871 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 134 [2021-01-06 16:55:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:02,873 INFO L225 Difference]: With dead ends: 230 [2021-01-06 16:55:02,873 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 16:55:02,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1895, Invalid=6661, Unknown=0, NotChecked=0, Total=8556 [2021-01-06 16:55:02,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 16:55:02,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-01-06 16:55:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 16:55:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2021-01-06 16:55:02,891 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2021-01-06 16:55:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:02,891 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2021-01-06 16:55:02,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2021-01-06 16:55:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2021-01-06 16:55:02,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 16:55:02,892 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:02,892 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:03,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:55:03,093 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:03,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:03,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1229322357, now seen corresponding path program 33 times [2021-01-06 16:55:03,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:03,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666074856] [2021-01-06 16:55:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 0 proven. 1366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:06,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666074856] [2021-01-06 16:55:06,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363297761] [2021-01-06 16:55:06,457 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:09,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-01-06 16:55:09,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:09,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 16:55:09,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:12,735 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 16:55:12,736 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:55:12,744 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:55:12,745 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:55:12,745 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 16:55:18,983 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:55:18,985 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:55:18,985 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:55:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 861 proven. 505 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:19,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:19,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 97 [2021-01-06 16:55:19,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504699638] [2021-01-06 16:55:19,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-01-06 16:55:19,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:19,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-01-06 16:55:19,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=937, Invalid=8375, Unknown=0, NotChecked=0, Total=9312 [2021-01-06 16:55:19,229 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 97 states. [2021-01-06 16:55:43,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:43,935 INFO L93 Difference]: Finished difference Result 239 states and 242 transitions. [2021-01-06 16:55:43,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-01-06 16:55:43,936 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 136 [2021-01-06 16:55:43,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:43,937 INFO L225 Difference]: With dead ends: 239 [2021-01-06 16:55:43,938 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 16:55:43,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12407 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=2918, Invalid=50212, Unknown=0, NotChecked=0, Total=53130 [2021-01-06 16:55:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 16:55:43,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2021-01-06 16:55:43,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-01-06 16:55:43,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2021-01-06 16:55:43,965 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 136 [2021-01-06 16:55:43,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:43,965 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2021-01-06 16:55:43,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2021-01-06 16:55:43,966 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2021-01-06 16:55:43,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-01-06 16:55:43,966 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:43,967 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:44,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 16:55:44,179 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:44,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:44,179 INFO L82 PathProgramCache]: Analyzing trace with hash 23895017, now seen corresponding path program 34 times [2021-01-06 16:55:44,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:44,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442222646] [2021-01-06 16:55:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 0 proven. 1497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:47,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442222646] [2021-01-06 16:55:47,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004448002] [2021-01-06 16:55:47,712 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:50,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:55:50,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:50,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 16:55:50,123 INFO L286 TraceCheckSpWp]: Computing forward predicates...