/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:49:06,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:49:06,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:49:06,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 18:49:06,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 18:49:06,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 18:49:06,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 18:49:06,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 18:49:06,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 18:49:06,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 18:49:06,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 18:49:06,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 18:49:06,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:49:06,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:49:06,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:49:06,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:49:06,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:49:06,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:49:06,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:49:06,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:49:06,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:49:06,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:49:06,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:49:06,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:49:06,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:49:06,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:49:06,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:49:06,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:49:06,925 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 18:49:06,941 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:49:06,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:49:06,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:49:06,944 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:49:06,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:49:06,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:49:06,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:49:06,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:49:06,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:49:06,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:49:06,946 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:49:06,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:49:06,946 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:49:06,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:49:06,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:49:06,947 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:49:06,947 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:49:06,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:49:06,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:49:06,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:49:06,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:49:06,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:49:06,948 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:49:07,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:49:07,275 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:49:07,282 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:49:07,284 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:49:07,285 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:49:07,285 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-22 18:49:07,370 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84de5f14f/9b5e80df671141deba95ee5156a0651c/FLAGd5a80cd59 [2020-08-22 18:49:07,858 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:49:07,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-22 18:49:07,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84de5f14f/9b5e80df671141deba95ee5156a0651c/FLAGd5a80cd59 [2020-08-22 18:49:08,221 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84de5f14f/9b5e80df671141deba95ee5156a0651c [2020-08-22 18:49:08,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:49:08,233 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:49:08,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:49:08,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:49:08,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:49:08,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:49:08" (1/1) ... [2020-08-22 18:49:08,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b19de8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:08, skipping insertion in model container [2020-08-22 18:49:08,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:49:08" (1/1) ... [2020-08-22 18:49:08,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:49:08,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:49:08,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:49:08,523 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:49:08,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:49:08,559 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:49:08,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:08 WrapperNode [2020-08-22 18:49:08,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:49:08,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:49:08,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:49:08,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:49:08,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:08" (1/1) ... [2020-08-22 18:49:08,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:08" (1/1) ... [2020-08-22 18:49:08,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:08" (1/1) ... [2020-08-22 18:49:08,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:08" (1/1) ... [2020-08-22 18:49:08,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:08" (1/1) ... [2020-08-22 18:49:08,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:08" (1/1) ... [2020-08-22 18:49:08,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:08" (1/1) ... [2020-08-22 18:49:08,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:49:08,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:49:08,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:49:08,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:49:08,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:08" (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 [2020-08-22 18:49:08,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:49:08,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:49:08,786 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 18:49:08,786 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-22 18:49:08,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:49:08,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 18:49:08,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:49:08,787 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 18:49:08,787 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-22 18:49:08,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:49:08,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:49:08,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:49:09,052 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:49:09,052 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 18:49:09,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:49:09 BoogieIcfgContainer [2020-08-22 18:49:09,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:49:09,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:49:09,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:49:09,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:49:09,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:49:08" (1/3) ... [2020-08-22 18:49:09,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3164d346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:49:09, skipping insertion in model container [2020-08-22 18:49:09,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:08" (2/3) ... [2020-08-22 18:49:09,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3164d346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:49:09, skipping insertion in model container [2020-08-22 18:49:09,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:49:09" (3/3) ... [2020-08-22 18:49:09,095 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2020-08-22 18:49:09,128 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:49:09,150 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:49:09,169 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:49:09,193 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:49:09,193 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:49:09,193 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:49:09,193 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:49:09,194 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:49:09,194 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:49:09,195 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:49:09,195 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:49:09,211 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 18:49:09,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 18:49:09,222 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:09,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:09,223 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:09,230 INFO L82 PathProgramCache]: Analyzing trace with hash 875745540, now seen corresponding path program 1 times [2020-08-22 18:49:09,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:09,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466055378] [2020-08-22 18:49:09,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:09,303 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:09,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:09,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:49:09,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466055378] [2020-08-22 18:49:09,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:09,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:49:09,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903245917] [2020-08-22 18:49:09,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:49:09,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:09,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:49:09,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:49:09,605 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-08-22 18:49:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:09,708 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-08-22 18:49:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:49:09,710 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 18:49:09,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:09,724 INFO L225 Difference]: With dead ends: 51 [2020-08-22 18:49:09,725 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 18:49:09,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:49:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 18:49:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 18:49:09,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 18:49:09,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-08-22 18:49:09,782 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2020-08-22 18:49:09,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:09,782 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-08-22 18:49:09,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:49:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-08-22 18:49:09,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 18:49:09,785 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:09,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:09,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:49:09,786 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:09,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:09,787 INFO L82 PathProgramCache]: Analyzing trace with hash 71846672, now seen corresponding path program 1 times [2020-08-22 18:49:09,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:09,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001268996] [2020-08-22 18:49:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:09,791 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:09,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:09,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:09,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:49:10,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001268996] [2020-08-22 18:49:10,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:10,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 18:49:10,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607109900] [2020-08-22 18:49:10,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 18:49:10,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:10,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 18:49:10,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:49:10,018 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-08-22 18:49:10,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:10,137 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-08-22 18:49:10,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 18:49:10,137 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-08-22 18:49:10,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:10,139 INFO L225 Difference]: With dead ends: 66 [2020-08-22 18:49:10,140 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 18:49:10,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:49:10,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 18:49:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-08-22 18:49:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 18:49:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-22 18:49:10,155 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25 [2020-08-22 18:49:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:10,156 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-22 18:49:10,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 18:49:10,156 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-22 18:49:10,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 18:49:10,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:10,158 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:10,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:49:10,159 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:10,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:10,160 INFO L82 PathProgramCache]: Analyzing trace with hash -511991682, now seen corresponding path program 1 times [2020-08-22 18:49:10,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:10,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896603916] [2020-08-22 18:49:10,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:10,192 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:10,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:10,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:10,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:10,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 18:49:10,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896603916] [2020-08-22 18:49:10,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:10,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:49:10,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929654335] [2020-08-22 18:49:10,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:49:10,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:10,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:49:10,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:49:10,411 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2020-08-22 18:49:10,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:10,503 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-08-22 18:49:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:49:10,504 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-22 18:49:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:10,506 INFO L225 Difference]: With dead ends: 69 [2020-08-22 18:49:10,506 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 18:49:10,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:49:10,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 18:49:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-08-22 18:49:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 18:49:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-08-22 18:49:10,520 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-08-22 18:49:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:10,520 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-08-22 18:49:10,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:49:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-08-22 18:49:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 18:49:10,522 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:10,522 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:10,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 18:49:10,523 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:10,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1477652418, now seen corresponding path program 1 times [2020-08-22 18:49:10,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:10,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035428176] [2020-08-22 18:49:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:10,532 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:10,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:10,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:10,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:10,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 18:49:10,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035428176] [2020-08-22 18:49:10,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:10,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:49:10,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226047563] [2020-08-22 18:49:10,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:49:10,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:10,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:49:10,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:49:10,646 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-08-22 18:49:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:10,679 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-08-22 18:49:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:49:10,680 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-22 18:49:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:10,681 INFO L225 Difference]: With dead ends: 54 [2020-08-22 18:49:10,682 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 18:49:10,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:49:10,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 18:49:10,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-08-22 18:49:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 18:49:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-08-22 18:49:10,694 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-08-22 18:49:10,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:10,694 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-08-22 18:49:10,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:49:10,695 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-08-22 18:49:10,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 18:49:10,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:10,696 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:10,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 18:49:10,697 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:10,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:10,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2109914946, now seen corresponding path program 1 times [2020-08-22 18:49:10,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:10,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365080577] [2020-08-22 18:49:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:10,705 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:10,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:10,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:10,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:10,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 18:49:10,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365080577] [2020-08-22 18:49:10,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:10,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 18:49:10,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255425251] [2020-08-22 18:49:10,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 18:49:10,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:10,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 18:49:10,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:49:10,921 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 11 states. [2020-08-22 18:49:11,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:11,153 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-08-22 18:49:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 18:49:11,155 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-08-22 18:49:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:11,157 INFO L225 Difference]: With dead ends: 90 [2020-08-22 18:49:11,157 INFO L226 Difference]: Without dead ends: 61 [2020-08-22 18:49:11,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-22 18:49:11,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-22 18:49:11,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-08-22 18:49:11,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 18:49:11,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-08-22 18:49:11,177 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 34 [2020-08-22 18:49:11,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:11,179 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-08-22 18:49:11,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 18:49:11,179 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-08-22 18:49:11,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 18:49:11,182 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:11,183 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:11,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 18:49:11,183 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:11,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:11,184 INFO L82 PathProgramCache]: Analyzing trace with hash 830258234, now seen corresponding path program 1 times [2020-08-22 18:49:11,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:11,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688203967] [2020-08-22 18:49:11,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:11,197 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:11,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:11,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:11,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:11,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:11,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 18:49:11,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688203967] [2020-08-22 18:49:11,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:11,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 18:49:11,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203389816] [2020-08-22 18:49:11,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 18:49:11,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:11,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 18:49:11,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 18:49:11,569 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 14 states. [2020-08-22 18:49:11,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:11,857 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2020-08-22 18:49:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 18:49:11,858 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-08-22 18:49:11,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:11,861 INFO L225 Difference]: With dead ends: 102 [2020-08-22 18:49:11,861 INFO L226 Difference]: Without dead ends: 73 [2020-08-22 18:49:11,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-08-22 18:49:11,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-22 18:49:11,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2020-08-22 18:49:11,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 18:49:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-08-22 18:49:11,891 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 43 [2020-08-22 18:49:11,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:11,891 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-08-22 18:49:11,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 18:49:11,892 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-08-22 18:49:11,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 18:49:11,899 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:11,901 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:11,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 18:49:11,902 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:11,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:11,902 INFO L82 PathProgramCache]: Analyzing trace with hash 444280, now seen corresponding path program 2 times [2020-08-22 18:49:11,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:11,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654787283] [2020-08-22 18:49:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:11,920 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:12,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:12,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:12,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:12,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:12,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:12,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-22 18:49:12,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654787283] [2020-08-22 18:49:12,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:12,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-08-22 18:49:12,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000565714] [2020-08-22 18:49:12,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 18:49:12,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:12,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 18:49:12,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-22 18:49:12,370 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 17 states. [2020-08-22 18:49:12,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:12,726 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2020-08-22 18:49:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 18:49:12,727 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-08-22 18:49:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:12,729 INFO L225 Difference]: With dead ends: 114 [2020-08-22 18:49:12,729 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 18:49:12,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-08-22 18:49:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 18:49:12,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2020-08-22 18:49:12,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 18:49:12,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-08-22 18:49:12,745 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 52 [2020-08-22 18:49:12,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:12,745 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-08-22 18:49:12,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 18:49:12,745 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-08-22 18:49:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 18:49:12,747 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:12,747 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:12,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 18:49:12,747 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:12,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:12,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1783783324, now seen corresponding path program 2 times [2020-08-22 18:49:12,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:12,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424043573] [2020-08-22 18:49:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:12,756 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:12,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:12,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:12,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:12,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:13,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:13,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:13,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 18:49:13,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424043573] [2020-08-22 18:49:13,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:13,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-08-22 18:49:13,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182879697] [2020-08-22 18:49:13,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 18:49:13,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:13,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 18:49:13,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-22 18:49:13,219 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2020-08-22 18:49:13,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:13,737 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2020-08-22 18:49:13,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 18:49:13,737 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 61 [2020-08-22 18:49:13,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:13,739 INFO L225 Difference]: With dead ends: 128 [2020-08-22 18:49:13,739 INFO L226 Difference]: Without dead ends: 99 [2020-08-22 18:49:13,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2020-08-22 18:49:13,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-22 18:49:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 71. [2020-08-22 18:49:13,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 18:49:13,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-08-22 18:49:13,773 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 61 [2020-08-22 18:49:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:13,773 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-08-22 18:49:13,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 18:49:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-08-22 18:49:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-22 18:49:13,775 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:13,775 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:13,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 18:49:13,776 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:13,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:13,776 INFO L82 PathProgramCache]: Analyzing trace with hash -756456142, now seen corresponding path program 3 times [2020-08-22 18:49:13,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:13,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344164001] [2020-08-22 18:49:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:13,789 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:13,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:13,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:13,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:14,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:14,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:14,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:14,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:14,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:14,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-22 18:49:14,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344164001] [2020-08-22 18:49:14,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:14,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-08-22 18:49:14,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389322188] [2020-08-22 18:49:14,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 18:49:14,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:14,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 18:49:14,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-22 18:49:14,406 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 20 states. [2020-08-22 18:49:14,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:14,962 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2020-08-22 18:49:14,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 18:49:14,962 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 70 [2020-08-22 18:49:14,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:14,967 INFO L225 Difference]: With dead ends: 135 [2020-08-22 18:49:14,967 INFO L226 Difference]: Without dead ends: 109 [2020-08-22 18:49:14,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2020-08-22 18:49:14,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-22 18:49:14,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-08-22 18:49:14,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 18:49:15,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-08-22 18:49:15,003 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 70 [2020-08-22 18:49:15,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:15,004 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-08-22 18:49:15,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 18:49:15,004 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-08-22 18:49:15,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 18:49:15,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:15,006 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:15,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 18:49:15,006 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:15,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:15,007 INFO L82 PathProgramCache]: Analyzing trace with hash -242092146, now seen corresponding path program 3 times [2020-08-22 18:49:15,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:15,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308394318] [2020-08-22 18:49:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:15,017 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:15,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:15,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:15,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:15,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:15,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:15,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:15,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:15,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:15,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 18:49:15,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308394318] [2020-08-22 18:49:15,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:15,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-08-22 18:49:15,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68585003] [2020-08-22 18:49:15,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 18:49:15,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:15,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 18:49:15,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-22 18:49:15,776 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 20 states. [2020-08-22 18:49:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:16,290 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2020-08-22 18:49:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 18:49:16,292 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2020-08-22 18:49:16,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:16,293 INFO L225 Difference]: With dead ends: 117 [2020-08-22 18:49:16,293 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 18:49:16,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2020-08-22 18:49:16,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 18:49:16,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 18:49:16,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 18:49:16,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 18:49:16,299 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2020-08-22 18:49:16,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:16,300 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 18:49:16,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 18:49:16,300 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 18:49:16,300 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 18:49:16,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 18:49:16,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 18:49:16,954 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-08-22 18:49:17,202 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-08-22 18:49:17,449 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 18:49:17,450 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 18:49:17,450 INFO L264 CegarLoopResult]: At program point id2FINAL(lines 14 19) the Hoare annotation is: (or (and (<= |id2_#res| 5) (<= 5 |id2_#res|)) (and (<= |id2_#res| 3) (<= 3 id2_~ret~1) (<= id2_~ret~1 3) (<= 3 |id2_#res|)) (and (<= |id2_#res| 1) (<= 1 id2_~ret~1) (<= id2_~ret~1 1) (<= 1 |id2_#res|)) (and (<= |id2_#res| 0) (<= 0 |id2_#res|)) (and (<= 4 id2_~ret~1) (<= id2_~ret~1 4) (<= |id2_#res| 4) (<= 4 |id2_#res|)) (and (<= 2 |id2_#res|) (<= id2_~ret~1 2) (<= |id2_#res| 2) (<= 2 id2_~ret~1))) [2020-08-22 18:49:17,451 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (or (and (<= 4 id2_~ret~1) (<= id2_~ret~1 4)) (and (<= id2_~ret~1 5) (<= 5 id2_~ret~1)) (and (<= id2_~ret~1 2) (<= 2 id2_~ret~1)) (and (<= 1 id2_~ret~1) (<= id2_~ret~1 1)) (and (<= 3 id2_~ret~1) (<= id2_~ret~1 3))) [2020-08-22 18:49:17,451 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (or (and (<= 4 id2_~ret~1) (<= id2_~ret~1 4)) (and (<= id2_~ret~1 5) (<= 5 id2_~ret~1)) (and (<= id2_~ret~1 2) (<= 2 id2_~ret~1)) (and (<= 1 id2_~ret~1) (<= id2_~ret~1 1)) (and (<= 6 id2_~ret~1) (<= (div id2_~ret~1 4294967296) 0)) (and (<= 3 id2_~ret~1) (<= id2_~ret~1 3))) [2020-08-22 18:49:17,452 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-22 18:49:17,452 INFO L264 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: (and (<= 6 id2_~ret~1) (<= (div id2_~ret~1 4294967296) 0)) [2020-08-22 18:49:17,452 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-22 18:49:17,452 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (or (and (<= |id2_#t~ret1| 5) (<= 5 |id2_#t~ret1|)) (and (<= 2 |id2_#t~ret1|) (<= |id2_#t~ret1| 2)) (and (<= 4 |id2_#t~ret1|) (<= |id2_#t~ret1| 4)) (and (<= 0 |id2_#t~ret1|) (<= |id2_#t~ret1| 0)) (and (<= |id2_#t~ret1| 1) (<= 1 |id2_#t~ret1|)) (and (<= 3 |id2_#t~ret1|) (<= |id2_#t~ret1| 3))) [2020-08-22 18:49:17,453 INFO L271 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: true [2020-08-22 18:49:17,453 INFO L264 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: (or (and (<= |id2_#t~ret1| 5) (<= 6 id2_~ret~1) (<= 5 |id2_#t~ret1|) (<= (div id2_~ret~1 4294967296) 0)) (and (<= 0 |id2_#t~ret1|) (<= |id2_#t~ret1| 0) (<= 1 id2_~ret~1) (<= id2_~ret~1 1)) (and (<= |id2_#t~ret1| 1) (<= 1 |id2_#t~ret1|) (<= id2_~ret~1 2) (<= 2 id2_~ret~1)) (and (<= 4 |id2_#t~ret1|) (<= id2_~ret~1 5) (<= |id2_#t~ret1| 4) (<= 5 id2_~ret~1)) (and (<= 4 id2_~ret~1) (<= 3 |id2_#t~ret1|) (<= id2_~ret~1 4) (<= |id2_#t~ret1| 3)) (and (<= 2 |id2_#t~ret1|) (<= |id2_#t~ret1| 2) (<= 3 id2_~ret~1) (<= id2_~ret~1 3))) [2020-08-22 18:49:17,453 INFO L264 CegarLoopResult]: At program point id2EXIT(lines 14 19) the Hoare annotation is: (or (and (<= |id2_#res| 5) (<= 5 |id2_#res|)) (and (<= |id2_#res| 3) (<= 3 id2_~ret~1) (<= id2_~ret~1 3) (<= 3 |id2_#res|)) (and (<= |id2_#res| 1) (<= 1 id2_~ret~1) (<= id2_~ret~1 1) (<= 1 |id2_#res|)) (and (<= |id2_#res| 0) (<= 0 |id2_#res|)) (and (<= 4 id2_~ret~1) (<= id2_~ret~1 4) (<= |id2_#res| 4) (<= 4 |id2_#res|)) (and (<= 2 |id2_#res|) (<= id2_~ret~1 2) (<= |id2_#res| 2) (<= 2 id2_~ret~1))) [2020-08-22 18:49:17,454 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-22 18:49:17,454 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 18:49:17,454 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 18:49:17,454 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 18:49:17,454 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 18:49:17,455 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) the Hoare annotation is: false [2020-08-22 18:49:17,455 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-22 18:49:17,455 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: false [2020-08-22 18:49:17,456 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 21 27) the Hoare annotation is: true [2020-08-22 18:49:17,456 INFO L264 CegarLoopResult]: At program point L24(lines 24 26) the Hoare annotation is: (and (< 0 (+ (div main_~result~0 4294967296) 1)) (<= main_~result~0 5)) [2020-08-22 18:49:17,457 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-22 18:49:17,457 INFO L271 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: true [2020-08-22 18:49:17,457 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (or (and (<= |main_#t~ret3| 3) (<= 3 |main_#t~ret3|)) (and (<= |main_#t~ret3| 0) (<= 0 |main_#t~ret3|)) (and (<= 2 |main_#t~ret3|) (<= |main_#t~ret3| 2)) (and (<= |main_#t~ret3| 1) (<= 1 |main_#t~ret3|)) (and (<= 5 |main_#t~ret3|) (<= |main_#t~ret3| 5)) (and (<= |main_#t~ret3| 4) (<= 4 |main_#t~ret3|))) [2020-08-22 18:49:17,457 INFO L271 CegarLoopResult]: At program point L24-2(lines 21 27) the Hoare annotation is: true [2020-08-22 18:49:17,458 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (< 0 (+ (div main_~result~0 4294967296) 1)))) (or (and (<= |main_#t~ret3| 0) (<= main_~result~0 0) (<= 0 |main_#t~ret3|) .cse0) (and (<= main_~result~0 3) .cse0 (<= |main_#t~ret3| 3) (<= 3 |main_#t~ret3|)) (and (<= |main_#t~ret3| 4) (<= main_~result~0 4) .cse0 (<= 4 |main_#t~ret3|)) (and (<= 2 |main_#t~ret3|) (<= main_~result~0 2) (<= |main_#t~ret3| 2) .cse0) (and (<= 5 |main_#t~ret3|) (<= |main_#t~ret3| 5) .cse0 (<= main_~result~0 5)) (and (<= |main_#t~ret3| 1) (<= main_~result~0 1) (<= 1 |main_#t~ret3|) .cse0))) [2020-08-22 18:49:17,458 INFO L264 CegarLoopResult]: At program point idFINAL(lines 7 12) the Hoare annotation is: (or (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0)) (and (<= |id_#res| 3) (<= 3 id_~ret~0) (<= id_~ret~0 3) (<= 3 |id_#res|)) (and (<= id_~ret~0 2) (<= 2 |id_#res|) (<= |id_#res| 2) (<= 2 id_~ret~0)) (and (<= |id_#res| 4) (<= 4 |id_#res|) (<= id_~ret~0 4) (<= 4 id_~ret~0)) (and (<= 0 |id_#res|) (<= |id_#res| 0)) (and (<= 5 |id_#res|) (<= |id_#res| 5))) [2020-08-22 18:49:17,458 INFO L264 CegarLoopResult]: At program point idEXIT(lines 7 12) the Hoare annotation is: (or (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0)) (and (<= |id_#res| 3) (<= 3 id_~ret~0) (<= id_~ret~0 3) (<= 3 |id_#res|)) (and (<= id_~ret~0 2) (<= 2 |id_#res|) (<= |id_#res| 2) (<= 2 id_~ret~0)) (and (<= |id_#res| 4) (<= 4 |id_#res|) (<= id_~ret~0 4) (<= 4 id_~ret~0)) (and (<= 0 |id_#res|) (<= |id_#res| 0)) (and (<= 5 |id_#res|) (<= |id_#res| 5))) [2020-08-22 18:49:17,459 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-22 18:49:17,459 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (or (and (<= 5 id_~ret~0) (<= id_~ret~0 5)) (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= id_~ret~0 4) (<= 4 id_~ret~0)) (and (<= 3 id_~ret~0) (<= id_~ret~0 3)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2020-08-22 18:49:17,459 INFO L264 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: (or (and (<= 5 id_~ret~0) (<= id_~ret~0 5)) (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 6 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) (and (<= id_~ret~0 4) (<= 4 id_~ret~0)) (and (<= 3 id_~ret~0) (<= id_~ret~0 3)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2020-08-22 18:49:17,459 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-22 18:49:17,460 INFO L271 CegarLoopResult]: At program point L10-1(line 10) the Hoare annotation is: true [2020-08-22 18:49:17,460 INFO L271 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-08-22 18:49:17,460 INFO L264 CegarLoopResult]: At program point L9-1(line 9) the Hoare annotation is: (or (and (<= 1 |id_#t~ret0|) (<= |id_#t~ret0| 1)) (and (<= |id_#t~ret0| 2) (<= 2 |id_#t~ret0|)) (and (<= |id_#t~ret0| 5) (<= 5 |id_#t~ret0|)) (and (<= 3 |id_#t~ret0|) (<= |id_#t~ret0| 3)) (and (<= 4 |id_#t~ret0|) (<= |id_#t~ret0| 4)) (and (<= 0 |id_#t~ret0|) (<= |id_#t~ret0| 0))) [2020-08-22 18:49:17,460 INFO L271 CegarLoopResult]: At program point L8-1(line 8) the Hoare annotation is: true [2020-08-22 18:49:17,460 INFO L264 CegarLoopResult]: At program point L9-2(line 9) the Hoare annotation is: (or (and (<= id_~ret~0 4) (<= 4 id_~ret~0) (<= 3 |id_#t~ret0|) (<= |id_#t~ret0| 3)) (and (<= |id_#t~ret0| 5) (<= 6 id_~ret~0) (<= (div id_~ret~0 4294967296) 0) (<= 5 |id_#t~ret0|)) (and (<= 5 id_~ret~0) (<= id_~ret~0 5) (<= 4 |id_#t~ret0|) (<= |id_#t~ret0| 4)) (and (<= |id_#t~ret0| 2) (<= 3 id_~ret~0) (<= id_~ret~0 3) (<= 2 |id_#t~ret0|)) (and (<= 0 |id_#t~ret0|) (<= |id_#t~ret0| 0) (<= id_~ret~0 1) (<= 1 id_~ret~0)) (and (<= id_~ret~0 2) (<= 1 |id_#t~ret0|) (<= |id_#t~ret0| 1) (<= 2 id_~ret~0))) [2020-08-22 18:49:17,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:49:17 BoogieIcfgContainer [2020-08-22 18:49:17,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 18:49:17,498 INFO L168 Benchmark]: Toolchain (without parser) took 9264.47 ms. Allocated memory was 138.4 MB in the beginning and 318.2 MB in the end (delta: 179.8 MB). Free memory was 101.8 MB in the beginning and 239.2 MB in the end (delta: -137.3 MB). Peak memory consumption was 186.1 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:17,498 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 119.7 MB in the beginning and 119.3 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-22 18:49:17,500 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.79 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 92.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:17,503 INFO L168 Benchmark]: Boogie Preprocessor took 147.62 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 92.0 MB in the beginning and 181.8 MB in the end (delta: -89.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:17,506 INFO L168 Benchmark]: RCFGBuilder took 360.97 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 168.5 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:17,507 INFO L168 Benchmark]: TraceAbstraction took 8422.45 ms. Allocated memory was 203.4 MB in the beginning and 318.2 MB in the end (delta: 114.8 MB). Free memory was 168.5 MB in the beginning and 239.2 MB in the end (delta: -70.7 MB). Peak memory consumption was 187.7 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:17,518 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.4 MB. Free memory was 119.7 MB in the beginning and 119.3 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 326.79 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 92.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 147.62 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 92.0 MB in the beginning and 181.8 MB in the end (delta: -89.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 360.97 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 168.5 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8422.45 ms. Allocated memory was 203.4 MB in the beginning and 318.2 MB in the end (delta: 114.8 MB). Free memory was 168.5 MB in the beginning and 239.2 MB in the end (delta: -70.7 MB). Peak memory consumption was 187.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 14]: Procedure Contract for id2 Derived contract for procedure id2: (((((\result <= 5 && 5 <= \result) || (((\result <= 3 && 3 <= ret) && ret <= 3) && 3 <= \result)) || (((\result <= 1 && 1 <= ret) && ret <= 1) && 1 <= \result)) || (\result <= 0 && 0 <= \result)) || (((4 <= ret && ret <= 4) && \result <= 4) && 4 <= \result)) || (((2 <= \result && ret <= 2) && \result <= 2) && 2 <= ret) - ProcedureContractResult [Line: 21]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 7]: Procedure Contract for id Derived contract for procedure id: (((((((\result <= 1 && ret <= 1) && 1 <= \result) && 1 <= ret) || (((\result <= 3 && 3 <= ret) && ret <= 3) && 3 <= \result)) || (((ret <= 2 && 2 <= \result) && \result <= 2) && 2 <= ret)) || (((\result <= 4 && 4 <= \result) && ret <= 4) && 4 <= ret)) || (0 <= \result && \result <= 0)) || (5 <= \result && \result <= 5) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.1s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 438 SDtfs, 96 SDslu, 4462 SDs, 0 SdLazy, 1592 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 293 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=9, 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, 10 MinimizatonAttempts, 85 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 38 LocationsWithAnnotation, 49 PreInvPairs, 294 NumberOfFragments, 866 HoareAnnotationTreeSize, 49 FomulaSimplifications, 14014 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 38 FomulaSimplificationsInter, 344 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...