/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/recursive-simple/sum_15x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:04:06,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:04:06,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:04:06,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:04:06,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:04:06,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:04:06,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:04:06,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:04:06,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:04:06,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:04:06,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:04:06,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:04:06,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:04:06,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:04:06,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:04:06,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:04:06,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:04:06,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:04:06,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:04:06,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:04:06,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:04:06,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:04:06,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:04:06,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:04:06,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 07:04:06,609 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 07:04:06,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 07:04:06,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 07:04:06,611 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 07:04:06,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 07:04:06,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:04:06,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:04:06,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:04:06,617 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:04:06,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:04:06,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:04:06,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:04:06,620 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:04:06,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:04:06,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:04:06,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:04:06,624 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:04:06,657 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:04:06,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:04:06,660 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:04:06,660 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:04:06,660 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:04:06,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:04:06,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:04:06,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:04:06,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:04:06,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:04:06,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:04:06,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:04:06,668 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:04:06,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:04:06,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:04:06,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:04:06,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:04:06,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:04:06,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:04:06,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:04:06,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:04:06,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:04:06,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:04:06,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:04:06,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:04:06,673 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/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:04:07,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:04:07,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:04:07,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:04:07,198 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:04:07,199 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:04:07,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2020-12-22 07:04:07,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee51acd31/2627856400cc42578231b7c7f76b03f5/FLAGf31f6c953 [2020-12-22 07:04:08,057 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:04:08,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2020-12-22 07:04:08,067 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee51acd31/2627856400cc42578231b7c7f76b03f5/FLAGf31f6c953 [2020-12-22 07:04:08,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee51acd31/2627856400cc42578231b7c7f76b03f5 [2020-12-22 07:04:08,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:04:08,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:04:08,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:04:08,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:04:08,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:04:08,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:04:08" (1/1) ... [2020-12-22 07:04:08,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@589d7a1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:08, skipping insertion in model container [2020-12-22 07:04:08,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:04:08" (1/1) ... [2020-12-22 07:04:08,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:04:08,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:04:08,622 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_15x0-1.c[481,494] [2020-12-22 07:04:08,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:04:08,638 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:04:08,658 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_15x0-1.c[481,494] [2020-12-22 07:04:08,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:04:08,675 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:04:08,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:08 WrapperNode [2020-12-22 07:04:08,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:04:08,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:04:08,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:04:08,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:04:08,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:08" (1/1) ... [2020-12-22 07:04:08,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:08" (1/1) ... [2020-12-22 07:04:08,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:04:08,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:04:08,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:04:08,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:04:08,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:08" (1/1) ... [2020-12-22 07:04:08,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:08" (1/1) ... [2020-12-22 07:04:08,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:08" (1/1) ... [2020-12-22 07:04:08,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:08" (1/1) ... [2020-12-22 07:04:08,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:08" (1/1) ... [2020-12-22 07:04:08,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:08" (1/1) ... [2020-12-22 07:04:08,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:08" (1/1) ... [2020-12-22 07:04:08,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:04:08,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:04:08,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:04:08,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:04:08,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:04:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:04:08,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:04:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-12-22 07:04:08,848 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-12-22 07:04:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:04:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:04:09,100 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:04:09,100 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 07:04:09,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:09 BoogieIcfgContainer [2020-12-22 07:04:09,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:04:09,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:04:09,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:04:09,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:04:09,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:04:08" (1/3) ... [2020-12-22 07:04:09,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590b236e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:04:09, skipping insertion in model container [2020-12-22 07:04:09,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:08" (2/3) ... [2020-12-22 07:04:09,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590b236e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:04:09, skipping insertion in model container [2020-12-22 07:04:09,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:09" (3/3) ... [2020-12-22 07:04:09,113 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2020-12-22 07:04:09,121 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:04:09,127 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:04:09,223 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:04:09,263 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:04:09,263 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:04:09,263 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:04:09,263 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:04:09,263 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:04:09,264 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:04:09,264 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:04:09,264 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:04:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-22 07:04:09,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 07:04:09,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:09,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:09,290 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:09,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:09,298 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2020-12-22 07:04:09,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:09,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696308054] [2020-12-22 07:04:09,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:09,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:04:09,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696308054] [2020-12-22 07:04:09,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:04:09,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:04:09,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215921081] [2020-12-22 07:04:09,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:04:09,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:09,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:04:09,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:04:09,587 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2020-12-22 07:04:09,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:09,738 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-22 07:04:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:04:09,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-22 07:04:09,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:09,751 INFO L225 Difference]: With dead ends: 25 [2020-12-22 07:04:09,752 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 07:04:09,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:04:09,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 07:04:09,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-22 07:04:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 07:04:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-22 07:04:09,805 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-22 07:04:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:09,806 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-22 07:04:09,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:04:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-22 07:04:09,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 07:04:09,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:09,808 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:09,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:04:09,809 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:09,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:09,810 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2020-12-22 07:04:09,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:09,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007000024] [2020-12-22 07:04:09,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:09,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:09,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:04:10,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007000024] [2020-12-22 07:04:10,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514836251] [2020-12-22 07:04:10,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:10,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 07:04:10,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:04:10,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:10,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 07:04:10,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579172709] [2020-12-22 07:04:10,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:04:10,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:10,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:04:10,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:04:10,358 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-12-22 07:04:10,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:10,445 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-22 07:04:10,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:04:10,446 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-22 07:04:10,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:10,448 INFO L225 Difference]: With dead ends: 22 [2020-12-22 07:04:10,449 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 07:04:10,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:04:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 07:04:10,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 07:04:10,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 07:04:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 07:04:10,471 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-12-22 07:04:10,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:10,472 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 07:04:10,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:04:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 07:04:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 07:04:10,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:10,476 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:10,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 07:04:10,700 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:10,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:10,703 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2020-12-22 07:04:10,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:10,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938742042] [2020-12-22 07:04:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:10,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:10,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:10,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:04:10,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938742042] [2020-12-22 07:04:10,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646288413] [2020-12-22 07:04:10,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:10,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:04:10,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:10,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 07:04:10,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:04:11,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:11,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 07:04:11,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727568647] [2020-12-22 07:04:11,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:04:11,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:11,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:04:11,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:04:11,063 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-12-22 07:04:11,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:11,179 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-22 07:04:11,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:04:11,181 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-12-22 07:04:11,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:11,183 INFO L225 Difference]: With dead ends: 25 [2020-12-22 07:04:11,183 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 07:04:11,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:04:11,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 07:04:11,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 07:04:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 07:04:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-22 07:04:11,193 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-12-22 07:04:11,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:11,195 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-22 07:04:11,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:04:11,196 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-22 07:04:11,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 07:04:11,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:11,197 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:11,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:11,398 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:11,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:11,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2020-12-22 07:04:11,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:11,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696726362] [2020-12-22 07:04:11,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:11,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:11,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:11,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:11,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 07:04:11,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696726362] [2020-12-22 07:04:11,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764153346] [2020-12-22 07:04:11,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:11,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 07:04:11,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:11,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 07:04:11,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 07:04:11,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:11,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 07:04:11,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903796458] [2020-12-22 07:04:11,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 07:04:11,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:11,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 07:04:11,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:04:11,750 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-12-22 07:04:11,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:11,837 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-22 07:04:11,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:04:11,838 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-22 07:04:11,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:11,839 INFO L225 Difference]: With dead ends: 28 [2020-12-22 07:04:11,839 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 07:04:11,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:04:11,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 07:04:11,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 07:04:11,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 07:04:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-22 07:04:11,846 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-12-22 07:04:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:11,847 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-22 07:04:11,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 07:04:11,847 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-22 07:04:11,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 07:04:11,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:11,849 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:12,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:12,065 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:12,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:12,066 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2020-12-22 07:04:12,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:12,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657984200] [2020-12-22 07:04:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:12,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:12,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:12,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:12,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:12,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 07:04:12,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657984200] [2020-12-22 07:04:12,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774910983] [2020-12-22 07:04:12,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:12,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 07:04:12,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:12,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 07:04:12,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 07:04:12,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:12,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 07:04:12,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798916304] [2020-12-22 07:04:12,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 07:04:12,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:12,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 07:04:12,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:04:12,440 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-12-22 07:04:12,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:12,527 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-22 07:04:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:04:12,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-22 07:04:12,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:12,529 INFO L225 Difference]: With dead ends: 31 [2020-12-22 07:04:12,529 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 07:04:12,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:04:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 07:04:12,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 07:04:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 07:04:12,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-22 07:04:12,537 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-12-22 07:04:12,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:12,537 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-22 07:04:12,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 07:04:12,538 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-22 07:04:12,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:04:12,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:12,539 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:12,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:12,756 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:12,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2020-12-22 07:04:12,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:12,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039179041] [2020-12-22 07:04:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:12,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:12,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:12,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:12,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:12,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:12,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 07:04:12,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039179041] [2020-12-22 07:04:12,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299478881] [2020-12-22 07:04:12,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:12,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 07:04:12,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:12,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 07:04:12,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 07:04:13,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:13,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 07:04:13,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043285273] [2020-12-22 07:04:13,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 07:04:13,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:13,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 07:04:13,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:04:13,066 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-12-22 07:04:13,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:13,150 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-22 07:04:13,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:04:13,151 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-12-22 07:04:13,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:13,152 INFO L225 Difference]: With dead ends: 34 [2020-12-22 07:04:13,152 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 07:04:13,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:04:13,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 07:04:13,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 07:04:13,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 07:04:13,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-22 07:04:13,159 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-12-22 07:04:13,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:13,160 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-22 07:04:13,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 07:04:13,160 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-22 07:04:13,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 07:04:13,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:13,162 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:13,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 07:04:13,376 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:13,377 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2020-12-22 07:04:13,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:13,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980742075] [2020-12-22 07:04:13,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:13,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:13,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:13,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:13,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:13,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:13,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:13,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-22 07:04:13,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980742075] [2020-12-22 07:04:13,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519911074] [2020-12-22 07:04:13,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:13,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 07:04:13,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:13,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 07:04:13,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-22 07:04:13,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:13,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 07:04:13,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418257428] [2020-12-22 07:04:13,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:04:13,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:13,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:04:13,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:04:13,856 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-12-22 07:04:13,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:13,950 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-12-22 07:04:13,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 07:04:13,951 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-12-22 07:04:13,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:13,952 INFO L225 Difference]: With dead ends: 37 [2020-12-22 07:04:13,952 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 07:04:13,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-12-22 07:04:13,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 07:04:13,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-22 07:04:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 07:04:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-22 07:04:13,959 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-12-22 07:04:13,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:13,960 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-22 07:04:13,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:04:13,960 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-22 07:04:13,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 07:04:13,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:13,962 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:14,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:14,178 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:14,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:14,179 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2020-12-22 07:04:14,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:14,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970315098] [2020-12-22 07:04:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:14,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:14,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:14,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:14,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:14,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:14,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:14,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:14,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-22 07:04:14,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970315098] [2020-12-22 07:04:14,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198038502] [2020-12-22 07:04:14,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:14,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 07:04:14,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-22 07:04:14,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:14,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 07:04:14,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647090640] [2020-12-22 07:04:14,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 07:04:14,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:14,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 07:04:14,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:04:14,572 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-12-22 07:04:14,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:14,678 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-22 07:04:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 07:04:14,679 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-12-22 07:04:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:14,680 INFO L225 Difference]: With dead ends: 40 [2020-12-22 07:04:14,680 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 07:04:14,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-12-22 07:04:14,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 07:04:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 07:04:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 07:04:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-22 07:04:14,687 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-12-22 07:04:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:14,687 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-22 07:04:14,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 07:04:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-22 07:04:14,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 07:04:14,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:14,689 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:14,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:14,905 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:14,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:14,906 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2020-12-22 07:04:14,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:14,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537166139] [2020-12-22 07:04:14,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:14,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 07:04:15,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537166139] [2020-12-22 07:04:15,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168844283] [2020-12-22 07:04:15,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:15,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:04:15,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:15,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 07:04:15,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 07:04:15,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:15,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 07:04:15,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421521895] [2020-12-22 07:04:15,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 07:04:15,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:15,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 07:04:15,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:04:15,475 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-12-22 07:04:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:15,623 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-12-22 07:04:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 07:04:15,624 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-12-22 07:04:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:15,625 INFO L225 Difference]: With dead ends: 43 [2020-12-22 07:04:15,626 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 07:04:15,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-12-22 07:04:15,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 07:04:15,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-22 07:04:15,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 07:04:15,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-22 07:04:15,633 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-12-22 07:04:15,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:15,633 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-22 07:04:15,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 07:04:15,633 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-22 07:04:15,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:04:15,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:15,635 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:15,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 07:04:15,849 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:15,850 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2020-12-22 07:04:15,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:15,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26947190] [2020-12-22 07:04:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:15,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-22 07:04:16,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26947190] [2020-12-22 07:04:16,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129463250] [2020-12-22 07:04:16,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:16,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 07:04:16,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:16,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 07:04:16,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-22 07:04:16,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:16,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 07:04:16,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939362130] [2020-12-22 07:04:16,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 07:04:16,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:16,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 07:04:16,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:04:16,449 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-12-22 07:04:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:16,599 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-22 07:04:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 07:04:16,599 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-12-22 07:04:16,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:16,601 INFO L225 Difference]: With dead ends: 46 [2020-12-22 07:04:16,601 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 07:04:16,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-12-22 07:04:16,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 07:04:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 07:04:16,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 07:04:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-22 07:04:16,608 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-12-22 07:04:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:16,608 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-22 07:04:16,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 07:04:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-22 07:04:16,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:04:16,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:16,610 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:16,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:16,825 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:16,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:16,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2020-12-22 07:04:16,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:16,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260343435] [2020-12-22 07:04:16,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:16,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-22 07:04:17,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260343435] [2020-12-22 07:04:17,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486523564] [2020-12-22 07:04:17,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:17,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 07:04:17,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:17,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 07:04:17,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-22 07:04:17,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:17,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 07:04:17,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123978757] [2020-12-22 07:04:17,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 07:04:17,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:17,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 07:04:17,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-12-22 07:04:17,420 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-12-22 07:04:17,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:17,596 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-12-22 07:04:17,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 07:04:17,596 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-12-22 07:04:17,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:17,598 INFO L225 Difference]: With dead ends: 49 [2020-12-22 07:04:17,598 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 07:04:17,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-12-22 07:04:17,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 07:04:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-22 07:04:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 07:04:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-22 07:04:17,605 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-12-22 07:04:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:17,606 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-22 07:04:17,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 07:04:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-22 07:04:17,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:04:17,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:17,607 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:17,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:17,821 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:17,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2020-12-22 07:04:17,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:17,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741934401] [2020-12-22 07:04:17,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:17,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-22 07:04:18,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741934401] [2020-12-22 07:04:18,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677702614] [2020-12-22 07:04:18,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:18,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 07:04:18,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:18,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 07:04:18,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-22 07:04:18,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:18,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 07:04:18,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144623974] [2020-12-22 07:04:18,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:04:18,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:18,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:04:18,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:04:18,507 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-12-22 07:04:18,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:18,693 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-22 07:04:18,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 07:04:18,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-12-22 07:04:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:18,696 INFO L225 Difference]: With dead ends: 52 [2020-12-22 07:04:18,696 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 07:04:18,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-12-22 07:04:18,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 07:04:18,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 07:04:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 07:04:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-22 07:04:18,704 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-12-22 07:04:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:18,704 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-22 07:04:18,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:04:18,704 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-22 07:04:18,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:04:18,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:18,706 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:18,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 07:04:18,920 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:18,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:18,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2020-12-22 07:04:18,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:18,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953728505] [2020-12-22 07:04:18,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:18,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-22 07:04:19,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953728505] [2020-12-22 07:04:19,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116187189] [2020-12-22 07:04:19,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:19,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 07:04:19,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:19,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 07:04:19,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-22 07:04:19,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:19,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 07:04:19,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911963741] [2020-12-22 07:04:19,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 07:04:19,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:19,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 07:04:19,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-12-22 07:04:19,692 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-12-22 07:04:19,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:19,892 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-12-22 07:04:19,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 07:04:19,892 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-12-22 07:04:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:19,893 INFO L225 Difference]: With dead ends: 55 [2020-12-22 07:04:19,894 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 07:04:19,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-12-22 07:04:19,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 07:04:19,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 07:04:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 07:04:19,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-22 07:04:19,901 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-12-22 07:04:19,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:19,901 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-22 07:04:19,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 07:04:19,901 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-22 07:04:19,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 07:04:19,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:19,902 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:20,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 07:04:20,117 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:20,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:20,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2020-12-22 07:04:20,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:20,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66867199] [2020-12-22 07:04:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-22 07:04:20,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66867199] [2020-12-22 07:04:20,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496327078] [2020-12-22 07:04:20,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:20,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 07:04:20,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-22 07:04:20,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:20,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 07:04:20,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736331766] [2020-12-22 07:04:20,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 07:04:20,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:20,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 07:04:20,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-12-22 07:04:20,867 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-12-22 07:04:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:21,068 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-22 07:04:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 07:04:21,069 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2020-12-22 07:04:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:21,070 INFO L225 Difference]: With dead ends: 58 [2020-12-22 07:04:21,070 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 07:04:21,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 07:04:21,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 07:04:21,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-22 07:04:21,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 07:04:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-22 07:04:21,083 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-12-22 07:04:21,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:21,084 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-22 07:04:21,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 07:04:21,084 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-22 07:04:21,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:04:21,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:21,086 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:21,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 07:04:21,299 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:21,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:21,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2020-12-22 07:04:21,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:21,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026278485] [2020-12-22 07:04:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-22 07:04:21,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026278485] [2020-12-22 07:04:21,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153162678] [2020-12-22 07:04:21,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:21,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:04:21,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:21,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 07:04:21,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-22 07:04:22,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:22,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 07:04:22,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004369839] [2020-12-22 07:04:22,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 07:04:22,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:22,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 07:04:22,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-12-22 07:04:22,056 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-12-22 07:04:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:22,323 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-12-22 07:04:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 07:04:22,323 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-12-22 07:04:22,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:22,324 INFO L225 Difference]: With dead ends: 61 [2020-12-22 07:04:22,325 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 07:04:22,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 07:04:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 07:04:22,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 07:04:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 07:04:22,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-12-22 07:04:22,332 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-12-22 07:04:22,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:22,332 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-12-22 07:04:22,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 07:04:22,333 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-12-22 07:04:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:04:22,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:22,334 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:22,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:22,548 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:22,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:22,548 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2020-12-22 07:04:22,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:22,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037212677] [2020-12-22 07:04:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:22,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:22,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:22,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:22,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-12-22 07:04:24,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037212677] [2020-12-22 07:04:24,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519126] [2020-12-22 07:04:24,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:24,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 07:04:24,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:24,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 137 conjunts are in the unsatisfiable core [2020-12-22 07:04:24,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 29 proven. 345 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-12-22 07:04:26,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:26,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 74 [2020-12-22 07:04:26,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655165116] [2020-12-22 07:04:26,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-22 07:04:26,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:26,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-22 07:04:26,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=5037, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 07:04:26,821 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 74 states. [2020-12-22 07:04:31,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:31,099 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-12-22 07:04:31,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 07:04:31,099 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 100 [2020-12-22 07:04:31,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:31,100 INFO L225 Difference]: With dead ends: 60 [2020-12-22 07:04:31,100 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 07:04:31,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2163 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=915, Invalid=11075, Unknown=0, NotChecked=0, Total=11990 [2020-12-22 07:04:31,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 07:04:31,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 07:04:31,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 07:04:31,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 07:04:31,105 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2020-12-22 07:04:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:31,105 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 07:04:31,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-22 07:04:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 07:04:31,106 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 07:04:31,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 07:04:31,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 07:04:31,359 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 07:04:31,359 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 07:04:31,359 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 07:04:31,359 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 07:04:31,359 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2020-12-22 07:04:31,360 INFO L189 CegarLoopUtils]: For program point L18(line 18) no Hoare annotation was computed. [2020-12-22 07:04:31,360 INFO L189 CegarLoopUtils]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-12-22 07:04:31,360 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (and (= ULTIMATE.start_main_~a~0 15) (= ULTIMATE.start_main_~b~0 0)) [2020-12-22 07:04:31,360 INFO L189 CegarLoopUtils]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-12-22 07:04:31,360 INFO L189 CegarLoopUtils]: For program point L13(lines 13 20) no Hoare annotation was computed. [2020-12-22 07:04:31,360 INFO L189 CegarLoopUtils]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2020-12-22 07:04:31,361 INFO L185 CegarLoopUtils]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (<= 1 sum_~n) (= sum_~m |sum_#in~m|)) [2020-12-22 07:04:31,361 INFO L189 CegarLoopUtils]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-12-22 07:04:31,361 INFO L189 CegarLoopUtils]: For program point L6(lines 6 10) no Hoare annotation was computed. [2020-12-22 07:04:31,361 INFO L189 CegarLoopUtils]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2020-12-22 07:04:31,361 INFO L192 CegarLoopUtils]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2020-12-22 07:04:31,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:04:31 BoogieIcfgContainer [2020-12-22 07:04:31,367 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 07:04:31,367 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 07:04:31,368 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 07:04:31,368 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 07:04:31,368 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:09" (3/4) ... [2020-12-22 07:04:31,373 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 07:04:31,381 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2020-12-22 07:04:31,386 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-22 07:04:31,387 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-22 07:04:31,387 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 07:04:31,387 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 07:04:31,424 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/sum_15x0-1.c-witness.graphml [2020-12-22 07:04:31,424 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 07:04:31,427 INFO L168 Benchmark]: Toolchain (without parser) took 22992.31 ms. Allocated memory was 151.0 MB in the beginning and 330.3 MB in the end (delta: 179.3 MB). Free memory was 126.7 MB in the beginning and 210.2 MB in the end (delta: -83.5 MB). Peak memory consumption was 96.4 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:31,428 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 123.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 07:04:31,428 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.04 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:31,429 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.61 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 115.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:31,429 INFO L168 Benchmark]: Boogie Preprocessor took 21.58 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 115.1 MB in the end (delta: 854.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:31,430 INFO L168 Benchmark]: RCFGBuilder took 366.41 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 103.8 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:31,431 INFO L168 Benchmark]: TraceAbstraction took 22262.60 ms. Allocated memory was 151.0 MB in the beginning and 330.3 MB in the end (delta: 179.3 MB). Free memory was 103.3 MB in the beginning and 212.3 MB in the end (delta: -109.0 MB). Peak memory consumption was 72.3 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:31,431 INFO L168 Benchmark]: Witness Printer took 57.09 ms. Allocated memory is still 330.3 MB. Free memory was 212.3 MB in the beginning and 210.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 07:04:31,435 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 123.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 239.04 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.61 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 115.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.58 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 115.1 MB in the end (delta: 854.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 366.41 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 103.8 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 22262.60 ms. Allocated memory was 151.0 MB in the beginning and 330.3 MB in the end (delta: 179.3 MB). Free memory was 103.3 MB in the beginning and 212.3 MB in the end (delta: -109.0 MB). Peak memory consumption was 72.3 MB. Max. memory is 8.0 GB. * Witness Printer took 57.09 ms. Allocated memory is still 330.3 MB. Free memory was 212.3 MB in the beginning and 210.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.0s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 158 SDtfs, 518 SDslu, 1308 SDs, 0 SdLazy, 2195 SolverSat, 160 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1485 GetRequests, 1093 SyntacticMatches, 0 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3283 ImplicationChecksByTransitivity, 8.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 10.3s InterpolantComputationTime, 1750 NumberOfCodeBlocks, 1750 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 1719 ConstructedInterpolants, 0 QuantifiedInterpolants, 393042 SizeOfPredicates, 154 NumberOfNonLiveVariables, 3015 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 4155/7680 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...