/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 11:44:16,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 11:44:16,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 11:44:16,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 11:44:16,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 11:44:16,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 11:44:16,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 11:44:16,173 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 11:44:16,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 11:44:16,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 11:44:16,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 11:44:16,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 11:44:16,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 11:44:16,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 11:44:16,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 11:44:16,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 11:44:16,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 11:44:16,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 11:44:16,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 11:44:16,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 11:44:16,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 11:44:16,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 11:44:16,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 11:44:16,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 11:44:16,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 11:44:16,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 11:44:16,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 11:44:16,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 11:44:16,207 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 11:44:16,222 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 11:44:16,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 11:44:16,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 11:44:16,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 11:44:16,224 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 11:44:16,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 11:44:16,224 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 11:44:16,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 11:44:16,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 11:44:16,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 11:44:16,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 11:44:16,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 11:44:16,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 11:44:16,225 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 11:44:16,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 11:44:16,226 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 11:44:16,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 11:44:16,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 11:44:16,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 11:44:16,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 11:44:16,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 11:44:16,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:44:16,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 11:44:16,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 11:44:16,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 11:44:16,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 11:44:16,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 11:44:16,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 11:44:16,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 11:44:16,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 11:44:16,504 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 11:44:16,518 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 11:44:16,522 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 11:44:16,523 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 11:44:16,524 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 11:44:16,524 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann04.c [2020-07-17 11:44:16,595 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5cdc0fa0/f0a58084a21146fd9cc8328a1f4f466a/FLAG1e68e2a6c [2020-07-17 11:44:17,045 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 11:44:17,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann04.c [2020-07-17 11:44:17,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5cdc0fa0/f0a58084a21146fd9cc8328a1f4f466a/FLAG1e68e2a6c [2020-07-17 11:44:17,484 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5cdc0fa0/f0a58084a21146fd9cc8328a1f4f466a [2020-07-17 11:44:17,497 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 11:44:17,501 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 11:44:17,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 11:44:17,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 11:44:17,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 11:44:17,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:44:17" (1/1) ... [2020-07-17 11:44:17,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dfb952b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:17, skipping insertion in model container [2020-07-17 11:44:17,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:44:17" (1/1) ... [2020-07-17 11:44:17,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 11:44:17,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 11:44:17,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:44:17,727 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 11:44:17,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:44:17,759 INFO L208 MainTranslator]: Completed translation [2020-07-17 11:44:17,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:17 WrapperNode [2020-07-17 11:44:17,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 11:44:17,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 11:44:17,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 11:44:17,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 11:44:17,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:17" (1/1) ... [2020-07-17 11:44:17,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:17" (1/1) ... [2020-07-17 11:44:17,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:17" (1/1) ... [2020-07-17 11:44:17,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:17" (1/1) ... [2020-07-17 11:44:17,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:17" (1/1) ... [2020-07-17 11:44:17,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:17" (1/1) ... [2020-07-17 11:44:17,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:17" (1/1) ... [2020-07-17 11:44:17,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 11:44:17,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 11:44:17,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 11:44:17,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 11:44:17,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:17" (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 [2020-07-17 11:44:17,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 11:44:17,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 11:44:17,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-17 11:44:17,931 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 11:44:17,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 11:44:17,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 11:44:17,932 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-17 11:44:17,932 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 11:44:17,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 11:44:17,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 11:44:18,120 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 11:44:18,120 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 11:44:18,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:44:18 BoogieIcfgContainer [2020-07-17 11:44:18,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 11:44:18,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 11:44:18,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 11:44:18,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 11:44:18,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 11:44:17" (1/3) ... [2020-07-17 11:44:18,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34fbfc4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:44:18, skipping insertion in model container [2020-07-17 11:44:18,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:17" (2/3) ... [2020-07-17 11:44:18,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34fbfc4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:44:18, skipping insertion in model container [2020-07-17 11:44:18,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:44:18" (3/3) ... [2020-07-17 11:44:18,132 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2020-07-17 11:44:18,144 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 11:44:18,152 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 11:44:18,166 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 11:44:18,212 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 11:44:18,213 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 11:44:18,213 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 11:44:18,214 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 11:44:18,214 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 11:44:18,214 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 11:44:18,214 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 11:44:18,215 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 11:44:18,242 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-17 11:44:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-17 11:44:18,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:18,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:18,255 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:18,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-17 11:44:18,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:18,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270285441] [2020-07-17 11:44:18,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 11:44:18,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270285441] [2020-07-17 11:44:18,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 11:44:18,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 11:44:18,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535488051] [2020-07-17 11:44:18,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 11:44:18,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:18,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 11:44:18,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 11:44:18,520 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-17 11:44:18,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:18,671 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2020-07-17 11:44:18,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:44:18,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-17 11:44:18,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:18,686 INFO L225 Difference]: With dead ends: 55 [2020-07-17 11:44:18,686 INFO L226 Difference]: Without dead ends: 28 [2020-07-17 11:44:18,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 11:44:18,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-17 11:44:18,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-17 11:44:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-17 11:44:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-07-17 11:44:18,735 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2020-07-17 11:44:18,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:18,736 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-07-17 11:44:18,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 11:44:18,736 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-07-17 11:44:18,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 11:44:18,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:18,739 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] [2020-07-17 11:44:18,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 11:44:18,740 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:18,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:18,741 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-17 11:44:18,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:18,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848310362] [2020-07-17 11:44:18,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 11:44:18,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848310362] [2020-07-17 11:44:18,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744420812] [2020-07-17 11:44:18,847 INFO L94 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 [2020-07-17 11:44:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:18,912 INFO L264 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-17 11:44:18,918 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 11:44:18,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:18,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-17 11:44:18,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270195634] [2020-07-17 11:44:18,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 11:44:18,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:18,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 11:44:18,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-17 11:44:18,986 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 7 states. [2020-07-17 11:44:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:19,127 INFO L93 Difference]: Finished difference Result 52 states and 77 transitions. [2020-07-17 11:44:19,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 11:44:19,130 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-07-17 11:44:19,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:19,134 INFO L225 Difference]: With dead ends: 52 [2020-07-17 11:44:19,134 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 11:44:19,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-17 11:44:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 11:44:19,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-17 11:44:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-17 11:44:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2020-07-17 11:44:19,158 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2020-07-17 11:44:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:19,160 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2020-07-17 11:44:19,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 11:44:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2020-07-17 11:44:19,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-17 11:44:19,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:19,166 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-07-17 11:44:19,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-17 11:44:19,383 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:19,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:19,384 INFO L82 PathProgramCache]: Analyzing trace with hash 718507263, now seen corresponding path program 1 times [2020-07-17 11:44:19,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:19,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209164990] [2020-07-17 11:44:19,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-17 11:44:19,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209164990] [2020-07-17 11:44:19,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114565683] [2020-07-17 11:44:19,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-17 11:44:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:19,661 INFO L264 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 11:44:19,672 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-17 11:44:19,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:19,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-17 11:44:19,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754704015] [2020-07-17 11:44:19,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 11:44:19,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:19,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 11:44:19,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 11:44:19,748 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 8 states. [2020-07-17 11:44:19,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:19,914 INFO L93 Difference]: Finished difference Result 77 states and 137 transitions. [2020-07-17 11:44:19,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 11:44:19,915 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-07-17 11:44:19,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:19,918 INFO L225 Difference]: With dead ends: 77 [2020-07-17 11:44:19,918 INFO L226 Difference]: Without dead ends: 53 [2020-07-17 11:44:19,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-17 11:44:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-17 11:44:19,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-17 11:44:19,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-17 11:44:19,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 79 transitions. [2020-07-17 11:44:19,934 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 79 transitions. Word has length 35 [2020-07-17 11:44:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:19,935 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 79 transitions. [2020-07-17 11:44:19,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 11:44:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 79 transitions. [2020-07-17 11:44:19,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-17 11:44:19,944 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:19,944 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:20,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:20,161 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:20,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:20,161 INFO L82 PathProgramCache]: Analyzing trace with hash -506207890, now seen corresponding path program 2 times [2020-07-17 11:44:20,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:20,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550163476] [2020-07-17 11:44:20,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-17 11:44:20,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550163476] [2020-07-17 11:44:20,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294469077] [2020-07-17 11:44:20,371 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-07-17 11:44:20,411 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:44:20,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:20,413 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-17 11:44:20,416 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-17 11:44:20,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:20,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-17 11:44:20,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908209416] [2020-07-17 11:44:20,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 11:44:20,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:20,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 11:44:20,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-17 11:44:20,454 INFO L87 Difference]: Start difference. First operand 53 states and 79 transitions. Second operand 8 states. [2020-07-17 11:44:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:20,575 INFO L93 Difference]: Finished difference Result 123 states and 230 transitions. [2020-07-17 11:44:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 11:44:20,576 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-07-17 11:44:20,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:20,579 INFO L225 Difference]: With dead ends: 123 [2020-07-17 11:44:20,579 INFO L226 Difference]: Without dead ends: 56 [2020-07-17 11:44:20,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-17 11:44:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-17 11:44:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-17 11:44:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-17 11:44:20,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2020-07-17 11:44:20,595 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 48 [2020-07-17 11:44:20,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:20,596 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2020-07-17 11:44:20,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 11:44:20,596 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2020-07-17 11:44:20,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-17 11:44:20,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:20,600 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:20,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:20,814 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:20,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:20,815 INFO L82 PathProgramCache]: Analyzing trace with hash 984881173, now seen corresponding path program 3 times [2020-07-17 11:44:20,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:20,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919663565] [2020-07-17 11:44:20,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 101 proven. 59 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-07-17 11:44:21,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919663565] [2020-07-17 11:44:21,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200106004] [2020-07-17 11:44:21,302 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-07-17 11:44:21,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-07-17 11:44:21,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:21,357 INFO L264 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-17 11:44:21,370 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 98 proven. 19 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-17 11:44:21,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:21,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 18 [2020-07-17 11:44:21,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980354249] [2020-07-17 11:44:21,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-17 11:44:21,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:21,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-17 11:44:21,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-07-17 11:44:21,477 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand 18 states. [2020-07-17 11:44:22,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:22,077 INFO L93 Difference]: Finished difference Result 122 states and 225 transitions. [2020-07-17 11:44:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 11:44:22,080 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-07-17 11:44:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:22,084 INFO L225 Difference]: With dead ends: 122 [2020-07-17 11:44:22,084 INFO L226 Difference]: Without dead ends: 74 [2020-07-17 11:44:22,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2020-07-17 11:44:22,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-17 11:44:22,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-07-17 11:44:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-17 11:44:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2020-07-17 11:44:22,101 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 82 [2020-07-17 11:44:22,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:22,101 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2020-07-17 11:44:22,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-17 11:44:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2020-07-17 11:44:22,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-07-17 11:44:22,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:22,107 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 18, 13, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:22,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:22,321 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:22,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:22,322 INFO L82 PathProgramCache]: Analyzing trace with hash -334549408, now seen corresponding path program 4 times [2020-07-17 11:44:22,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:22,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117135867] [2020-07-17 11:44:22,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 484 proven. 630 refuted. 0 times theorem prover too weak. 1193 trivial. 0 not checked. [2020-07-17 11:44:23,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117135867] [2020-07-17 11:44:23,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328143349] [2020-07-17 11:44:23,024 INFO L92 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 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 [2020-07-17 11:44:23,125 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 11:44:23,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:23,129 INFO L264 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-17 11:44:23,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 432 proven. 712 refuted. 0 times theorem prover too weak. 1163 trivial. 0 not checked. [2020-07-17 11:44:23,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:23,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2020-07-17 11:44:23,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245554441] [2020-07-17 11:44:23,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 11:44:23,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:23,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 11:44:23,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-07-17 11:44:23,308 INFO L87 Difference]: Start difference. First operand 56 states and 75 transitions. Second operand 17 states. [2020-07-17 11:44:23,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:23,653 INFO L93 Difference]: Finished difference Result 136 states and 253 transitions. [2020-07-17 11:44:23,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 11:44:23,654 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 213 [2020-07-17 11:44:23,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:23,659 INFO L225 Difference]: With dead ends: 136 [2020-07-17 11:44:23,659 INFO L226 Difference]: Without dead ends: 88 [2020-07-17 11:44:23,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-07-17 11:44:23,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-17 11:44:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2020-07-17 11:44:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-17 11:44:23,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 120 transitions. [2020-07-17 11:44:23,693 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 120 transitions. Word has length 213 [2020-07-17 11:44:23,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:23,696 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 120 transitions. [2020-07-17 11:44:23,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 11:44:23,696 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 120 transitions. [2020-07-17 11:44:23,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-17 11:44:23,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:23,701 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:23,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-17 11:44:23,903 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:23,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:23,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1060139340, now seen corresponding path program 5 times [2020-07-17 11:44:23,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:23,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270963258] [2020-07-17 11:44:23,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 250 proven. 107 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2020-07-17 11:44:24,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270963258] [2020-07-17 11:44:24,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680624052] [2020-07-17 11:44:24,244 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-07-17 11:44:24,299 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-07-17 11:44:24,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:24,301 INFO L264 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-17 11:44:24,305 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 385 proven. 71 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2020-07-17 11:44:24,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:24,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2020-07-17 11:44:24,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953124758] [2020-07-17 11:44:24,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-17 11:44:24,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:24,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-17 11:44:24,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-07-17 11:44:24,375 INFO L87 Difference]: Start difference. First operand 80 states and 120 transitions. Second operand 18 states. [2020-07-17 11:44:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:25,386 INFO L93 Difference]: Finished difference Result 198 states and 395 transitions. [2020-07-17 11:44:25,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-17 11:44:25,387 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-17 11:44:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:25,392 INFO L225 Difference]: With dead ends: 198 [2020-07-17 11:44:25,393 INFO L226 Difference]: Without dead ends: 112 [2020-07-17 11:44:25,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=450, Invalid=1712, Unknown=0, NotChecked=0, Total=2162 [2020-07-17 11:44:25,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-17 11:44:25,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2020-07-17 11:44:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-17 11:44:25,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 155 transitions. [2020-07-17 11:44:25,437 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 155 transitions. Word has length 121 [2020-07-17 11:44:25,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:25,437 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 155 transitions. [2020-07-17 11:44:25,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-17 11:44:25,438 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 155 transitions. [2020-07-17 11:44:25,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-17 11:44:25,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:25,441 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:25,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:25,658 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:25,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:25,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 6 times [2020-07-17 11:44:25,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:25,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435633019] [2020-07-17 11:44:25,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-07-17 11:44:26,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435633019] [2020-07-17 11:44:26,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976465480] [2020-07-17 11:44:26,291 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-07-17 11:44:26,436 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-07-17 11:44:26,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:26,439 INFO L264 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-17 11:44:26,446 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-07-17 11:44:26,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:26,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 24 [2020-07-17 11:44:26,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541169370] [2020-07-17 11:44:26,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-17 11:44:26,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:26,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-17 11:44:26,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-07-17 11:44:26,530 INFO L87 Difference]: Start difference. First operand 103 states and 155 transitions. Second operand 24 states. [2020-07-17 11:44:27,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:27,518 INFO L93 Difference]: Finished difference Result 227 states and 402 transitions. [2020-07-17 11:44:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-17 11:44:27,519 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 160 [2020-07-17 11:44:27,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:27,523 INFO L225 Difference]: With dead ends: 227 [2020-07-17 11:44:27,523 INFO L226 Difference]: Without dead ends: 136 [2020-07-17 11:44:27,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=543, Invalid=2649, Unknown=0, NotChecked=0, Total=3192 [2020-07-17 11:44:27,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-17 11:44:27,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 118. [2020-07-17 11:44:27,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-07-17 11:44:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 188 transitions. [2020-07-17 11:44:27,547 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 188 transitions. Word has length 160 [2020-07-17 11:44:27,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:27,548 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 188 transitions. [2020-07-17 11:44:27,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-17 11:44:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 188 transitions. [2020-07-17 11:44:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-17 11:44:27,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:27,551 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:27,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:27,766 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:27,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:27,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 7 times [2020-07-17 11:44:27,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:27,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717441932] [2020-07-17 11:44:27,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 686 proven. 70 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2020-07-17 11:44:28,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717441932] [2020-07-17 11:44:28,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124771283] [2020-07-17 11:44:28,506 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-07-17 11:44:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:28,592 INFO L264 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-17 11:44:28,596 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-07-17 11:44:28,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:28,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2020-07-17 11:44:28,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45285361] [2020-07-17 11:44:28,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-17 11:44:28,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:28,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-17 11:44:28,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-07-17 11:44:28,739 INFO L87 Difference]: Start difference. First operand 118 states and 188 transitions. Second operand 26 states. [2020-07-17 11:44:29,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:29,871 INFO L93 Difference]: Finished difference Result 183 states and 319 transitions. [2020-07-17 11:44:29,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-17 11:44:29,871 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 186 [2020-07-17 11:44:29,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:29,875 INFO L225 Difference]: With dead ends: 183 [2020-07-17 11:44:29,875 INFO L226 Difference]: Without dead ends: 179 [2020-07-17 11:44:29,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=588, Invalid=2604, Unknown=0, NotChecked=0, Total=3192 [2020-07-17 11:44:29,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-07-17 11:44:29,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2020-07-17 11:44:29,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-17 11:44:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 245 transitions. [2020-07-17 11:44:29,909 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 245 transitions. Word has length 186 [2020-07-17 11:44:29,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:29,911 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 245 transitions. [2020-07-17 11:44:29,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-17 11:44:29,911 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 245 transitions. [2020-07-17 11:44:29,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-17 11:44:29,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:29,914 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:30,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-17 11:44:30,125 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:30,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:30,126 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 8 times [2020-07-17 11:44:30,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:30,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539590405] [2020-07-17 11:44:30,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2020-07-17 11:44:30,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539590405] [2020-07-17 11:44:30,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787154636] [2020-07-17 11:44:30,821 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-07-17 11:44:30,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 11:44:30,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 11:44:30,930 INFO L264 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-17 11:44:30,935 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-17 11:44:31,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:31,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2020-07-17 11:44:31,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178847634] [2020-07-17 11:44:31,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-17 11:44:31,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:31,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-17 11:44:31,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-07-17 11:44:31,045 INFO L87 Difference]: Start difference. First operand 141 states and 245 transitions. Second operand 25 states. [2020-07-17 11:44:32,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:32,281 INFO L93 Difference]: Finished difference Result 285 states and 576 transitions. [2020-07-17 11:44:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-07-17 11:44:32,282 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 173 [2020-07-17 11:44:32,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:32,283 INFO L225 Difference]: With dead ends: 285 [2020-07-17 11:44:32,283 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 11:44:32,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=670, Invalid=3236, Unknown=0, NotChecked=0, Total=3906 [2020-07-17 11:44:32,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 11:44:32,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 11:44:32,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 11:44:32,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 11:44:32,299 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 173 [2020-07-17 11:44:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:32,300 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 11:44:32,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-17 11:44:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 11:44:32,300 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 11:44:32,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 11:44:32,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 11:44:33,182 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 64 [2020-07-17 11:44:34,447 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 15 [2020-07-17 11:44:35,187 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 41 [2020-07-17 11:44:35,265 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 11:44:35,265 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 11:44:35,265 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 11:44:35,265 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 11:44:35,265 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 11:44:35,265 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 11:44:35,265 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-17 11:44:35,266 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-17 11:44:35,266 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (or (not (<= |ackermann_#in~n| 1)) (not (= 0 |ackermann_#in~m|))) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-07-17 11:44:35,266 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-17 11:44:35,267 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (= 0 |ackermann_#in~n|)) [2020-07-17 11:44:35,267 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse9 (= 0 |ackermann_#in~m|)) (.cse5 (= ackermann_~m |ackermann_#in~m|)) (.cse6 (= ackermann_~n |ackermann_#in~n|))) (let ((.cse0 (<= |ackermann_#in~n| 1)) (.cse1 (<= 3 |ackermann_#t~ret1|)) (.cse2 (<= 5 |ackermann_#t~ret1|)) (.cse3 (<= |ackermann_#in~n| 2)) (.cse8 (and .cse9 .cse5 .cse6)) (.cse4 (<= 6 |ackermann_#t~ret1|))) (and (or (and .cse0 .cse1) (and (<= ackermann_~m 2) .cse2 .cse3) (<= |ackermann_#in~m| 1) .cse4) (let ((.cse7 (<= 1 |ackermann_#in~m|))) (or (and .cse0 .cse5 .cse6 (<= 2 |ackermann_#t~ret1|) .cse7) (and .cse1 .cse5 .cse6 .cse7) .cse8)) (or (and (<= |ackermann_#in~n| 3) (<= 4 |ackermann_#t~ret1|)) (and (<= |ackermann_#in~n| 4) .cse2) .cse3 .cse8 .cse4) (or (not (<= |ackermann_#in~n| 0)) .cse9)))) [2020-07-17 11:44:35,267 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-17 11:44:35,267 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-17 11:44:35,268 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-17 11:44:35,268 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-17 11:44:35,268 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-17 11:44:35,268 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-17 11:44:35,268 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-17 11:44:35,269 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-17 11:44:35,269 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-17 11:44:35,269 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-17 11:44:35,269 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-17 11:44:35,269 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-17 11:44:35,269 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-17 11:44:35,269 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-17 11:44:35,269 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-17 11:44:35,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 11:44:35 BoogieIcfgContainer [2020-07-17 11:44:35,275 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 11:44:35,277 INFO L168 Benchmark]: Toolchain (without parser) took 17778.13 ms. Allocated memory was 135.8 MB in the beginning and 481.8 MB in the end (delta: 346.0 MB). Free memory was 100.2 MB in the beginning and 150.6 MB in the end (delta: -50.3 MB). Peak memory consumption was 364.6 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:35,278 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 11:44:35,278 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.80 ms. Allocated memory is still 135.8 MB. Free memory was 99.8 MB in the beginning and 90.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:35,279 INFO L168 Benchmark]: Boogie Preprocessor took 27.02 ms. Allocated memory is still 135.8 MB. Free memory was 90.4 MB in the beginning and 89.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:35,286 INFO L168 Benchmark]: RCFGBuilder took 336.72 ms. Allocated memory was 135.8 MB in the beginning and 199.2 MB in the end (delta: 63.4 MB). Free memory was 89.0 MB in the beginning and 165.9 MB in the end (delta: -76.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:35,286 INFO L168 Benchmark]: TraceAbstraction took 17149.89 ms. Allocated memory was 199.2 MB in the beginning and 481.8 MB in the end (delta: 282.6 MB). Free memory was 165.2 MB in the beginning and 150.6 MB in the end (delta: 14.6 MB). Peak memory consumption was 366.1 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:35,291 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.80 ms. Allocated memory is still 135.8 MB. Free memory was 99.8 MB in the beginning and 90.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.02 ms. Allocated memory is still 135.8 MB. Free memory was 90.4 MB in the beginning and 89.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 336.72 ms. Allocated memory was 135.8 MB in the beginning and 199.2 MB in the end (delta: 63.4 MB). Free memory was 89.0 MB in the beginning and 165.9 MB in the end (delta: -76.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17149.89 ms. Allocated memory was 199.2 MB in the beginning and 481.8 MB in the end (delta: 282.6 MB). Free memory was 165.2 MB in the beginning and 150.6 MB in the end (delta: 14.6 MB). Peak memory consumption was 366.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.3s, OverallIterations: 10, TraceHistogramMax: 31, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 278 SDtfs, 282 SDslu, 1462 SDs, 0 SdLazy, 3202 SolverSat, 745 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1665 GetRequests, 1366 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2788 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred 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: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 91 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 517 PreInvPairs, 1175 NumberOfFragments, 136 HoareAnnotationTreeSize, 517 FomulaSimplifications, 88794 FormulaSimplificationTreeSizeReduction, 1.7s HoareSimplificationTime, 9 FomulaSimplificationsInter, 2540 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 2095 NumberOfCodeBlocks, 1990 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 2076 ConstructedInterpolants, 0 QuantifiedInterpolants, 585608 SizeOfPredicates, 67 NumberOfNonLiveVariables, 2738 ConjunctsInSsa, 186 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 12488/15598 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...