/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 --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:17:44,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:17:44,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:17:44,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:17:44,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:17:44,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:17:44,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:17:44,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:17:44,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:17:44,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:17:44,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:17:44,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:17:44,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:17:44,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:17:44,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:17:44,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:17:44,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:17:44,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:17:44,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:17:44,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:17:44,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:17:44,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:17:44,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:17:44,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:17:44,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:17:44,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:17:44,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:17:44,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:17:44,196 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 [2020-07-19 23:17:44,210 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:17:44,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:17:44,212 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:17:44,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:17:44,212 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:17:44,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:17:44,213 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:17:44,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:17:44,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:17:44,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:17:44,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:17:44,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:17:44,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:17:44,214 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:17:44,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:17:44,214 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:17:44,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:17:44,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:17:44,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:17:44,215 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:17:44,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:17:44,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:17:44,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:17:44,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:17:44,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:17:44,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:17:44,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:17:44,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:17:44,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:17:44,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:17:44,529 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:17:44,543 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:17:44,546 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:17:44,548 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:17:44,548 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:17:44,549 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-07-19 23:17:44,612 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fd92a0c5/639b062126ca41f8adbabf683a52c162/FLAG633c1c1c6 [2020-07-19 23:17:45,040 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:17:45,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-07-19 23:17:45,047 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fd92a0c5/639b062126ca41f8adbabf683a52c162/FLAG633c1c1c6 [2020-07-19 23:17:45,436 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fd92a0c5/639b062126ca41f8adbabf683a52c162 [2020-07-19 23:17:45,446 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:17:45,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:17:45,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:17:45,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:17:45,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:17:45,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@416ba85b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45, skipping insertion in model container [2020-07-19 23:17:45,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:17:45,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:17:45,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:17:45,708 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:17:45,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:17:45,738 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:17:45,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45 WrapperNode [2020-07-19 23:17:45,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:17:45,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:17:45,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:17:45,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:17:45,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (1/1) ... [2020-07-19 23:17:45,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:17:45,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:17:45,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:17:45,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:17:45,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (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 [2020-07-19 23:17:45,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:17:45,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:17:45,918 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-19 23:17:45,919 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:17:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:17:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-19 23:17:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:17:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:17:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:17:46,105 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:17:46,106 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 23:17:46,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:17:46 BoogieIcfgContainer [2020-07-19 23:17:46,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:17:46,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:17:46,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:17:46,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:17:46,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:17:45" (1/3) ... [2020-07-19 23:17:46,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343a57b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:17:46, skipping insertion in model container [2020-07-19 23:17:46,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:45" (2/3) ... [2020-07-19 23:17:46,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343a57b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:17:46, skipping insertion in model container [2020-07-19 23:17:46,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:17:46" (3/3) ... [2020-07-19 23:17:46,129 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2020-07-19 23:17:46,140 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:17:46,148 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:17:46,165 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:17:46,194 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:17:46,195 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:17:46,195 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:17:46,195 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:17:46,195 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:17:46,196 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:17:46,196 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:17:46,196 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:17:46,222 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-19 23:17:46,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 23:17:46,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:46,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:46,234 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:46,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:46,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-19 23:17:46,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:46,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234171766] [2020-07-19 23:17:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a34a170 [2020-07-19 23:17:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:17:46,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234171766] [2020-07-19 23:17:46,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:17:46,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:17:46,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32653266] [2020-07-19 23:17:46,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:17:46,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:46,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:17:46,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:17:46,527 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-19 23:17:46,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:46,627 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-19 23:17:46,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:17:46,629 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-19 23:17:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:46,638 INFO L225 Difference]: With dead ends: 30 [2020-07-19 23:17:46,639 INFO L226 Difference]: Without dead ends: 18 [2020-07-19 23:17:46,641 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 [2020-07-19 23:17:46,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-19 23:17:46,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-19 23:17:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-19 23:17:46,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-19 23:17:46,676 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-19 23:17:46,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:46,677 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-19 23:17:46,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:17:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-19 23:17:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-19 23:17:46,679 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:46,679 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:46,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:17:46,680 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:46,681 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-19 23:17:46,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:46,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642907971] [2020-07-19 23:17:46,682 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a34a170 [2020-07-19 23:17:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:17:46,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642907971] [2020-07-19 23:17:46,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679316413] [2020-07-19 23:17:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a2de273 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:46,881 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4a2de273 issued 2 check-sat command(s) [2020-07-19 23:17:46,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:46,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:17:46,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:17:46,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:46,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-19 23:17:46,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165348185] [2020-07-19 23:17:46,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:17:46,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:46,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:17:46,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:17:46,953 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-19 23:17:47,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:47,033 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-19 23:17:47,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:17:47,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-19 23:17:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:47,035 INFO L225 Difference]: With dead ends: 25 [2020-07-19 23:17:47,035 INFO L226 Difference]: Without dead ends: 21 [2020-07-19 23:17:47,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:17:47,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-19 23:17:47,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-19 23:17:47,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 23:17:47,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-19 23:17:47,045 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-19 23:17:47,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:47,045 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-19 23:17:47,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:17:47,046 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-19 23:17:47,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-19 23:17:47,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:47,047 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:47,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 23:17:47,263 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:47,264 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-19 23:17:47,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:47,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432448997] [2020-07-19 23:17:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a34a170 [2020-07-19 23:17:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 23:17:47,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432448997] [2020-07-19 23:17:47,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663824163] [2020-07-19 23:17:47,427 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2efd35f4 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 [2020-07-19 23:17:47,477 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2efd35f4 issued 2 check-sat command(s) [2020-07-19 23:17:47,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:47,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:17:47,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 23:17:47,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:47,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-19 23:17:47,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176231303] [2020-07-19 23:17:47,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:17:47,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:47,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:17:47,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:17:47,514 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-19 23:17:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:47,595 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-19 23:17:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:17:47,596 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-19 23:17:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:47,597 INFO L225 Difference]: With dead ends: 28 [2020-07-19 23:17:47,598 INFO L226 Difference]: Without dead ends: 24 [2020-07-19 23:17:47,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:17:47,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-19 23:17:47,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-19 23:17:47,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-19 23:17:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-19 23:17:47,606 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-19 23:17:47,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:47,606 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-19 23:17:47,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:17:47,607 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-19 23:17:47,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 23:17:47,608 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:47,608 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:47,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:47,823 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:47,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:47,824 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-19 23:17:47,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:47,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547433555] [2020-07-19 23:17:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a34a170 [2020-07-19 23:17:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 23:17:48,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547433555] [2020-07-19 23:17:48,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410704192] [2020-07-19 23:17:48,047 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6289e1e3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:48,080 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6289e1e3 issued 2 check-sat command(s) [2020-07-19 23:17:48,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:48,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:17:48,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 23:17:48,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:48,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-19 23:17:48,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941942165] [2020-07-19 23:17:48,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:17:48,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:48,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:17:48,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:17:48,113 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-19 23:17:48,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:48,193 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-19 23:17:48,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:17:48,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-19 23:17:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:48,195 INFO L225 Difference]: With dead ends: 31 [2020-07-19 23:17:48,196 INFO L226 Difference]: Without dead ends: 27 [2020-07-19 23:17:48,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:17:48,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-19 23:17:48,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-19 23:17:48,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 23:17:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-19 23:17:48,203 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-19 23:17:48,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:48,204 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-19 23:17:48,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:17:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-19 23:17:48,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-19 23:17:48,205 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:48,206 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:48,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:48,420 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:48,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:48,421 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-19 23:17:48,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:48,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531788707] [2020-07-19 23:17:48,423 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a34a170 [2020-07-19 23:17:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-19 23:17:48,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531788707] [2020-07-19 23:17:48,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850037147] [2020-07-19 23:17:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5881f768 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 [2020-07-19 23:17:48,663 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5881f768 issued 2 check-sat command(s) [2020-07-19 23:17:48,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:48,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 23:17:48,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-19 23:17:48,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:48,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-19 23:17:48,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739411077] [2020-07-19 23:17:48,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:17:48,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:48,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:17:48,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:17:48,699 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-19 23:17:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:48,791 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-19 23:17:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:17:48,791 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-19 23:17:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:48,793 INFO L225 Difference]: With dead ends: 34 [2020-07-19 23:17:48,793 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 23:17:48,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:17:48,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 23:17:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-19 23:17:48,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 23:17:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-19 23:17:48,800 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-19 23:17:48,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:48,801 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-19 23:17:48,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:17:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-19 23:17:48,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-19 23:17:48,803 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:48,803 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:49,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:49,018 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:49,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:49,019 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-19 23:17:49,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:49,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49326442] [2020-07-19 23:17:49,019 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a34a170 [2020-07-19 23:17:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-19 23:17:49,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49326442] [2020-07-19 23:17:49,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306528117] [2020-07-19 23:17:49,192 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@484dc5aa No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:49,229 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@484dc5aa issued 2 check-sat command(s) [2020-07-19 23:17:49,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:49,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 23:17:49,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-19 23:17:49,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:49,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-19 23:17:49,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868602929] [2020-07-19 23:17:49,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:17:49,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:49,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:17:49,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:17:49,281 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-19 23:17:49,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:49,393 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-19 23:17:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:17:49,394 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-19 23:17:49,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:49,397 INFO L225 Difference]: With dead ends: 37 [2020-07-19 23:17:49,397 INFO L226 Difference]: Without dead ends: 33 [2020-07-19 23:17:49,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:17:49,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-19 23:17:49,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-19 23:17:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 23:17:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-19 23:17:49,409 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-19 23:17:49,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:49,411 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-19 23:17:49,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:17:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-19 23:17:49,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-19 23:17:49,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:49,414 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:49,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-19 23:17:49,619 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:49,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:49,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-19 23:17:49,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:49,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507373302] [2020-07-19 23:17:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a34a170 [2020-07-19 23:17:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-19 23:17:49,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507373302] [2020-07-19 23:17:49,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285396691] [2020-07-19 23:17:49,801 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@55e1b9a4 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 [2020-07-19 23:17:49,836 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@55e1b9a4 issued 2 check-sat command(s) [2020-07-19 23:17:49,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:49,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 23:17:49,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-19 23:17:49,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:49,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-19 23:17:49,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542845038] [2020-07-19 23:17:49,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 23:17:49,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:49,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 23:17:49,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:17:49,887 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-19 23:17:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:49,997 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-19 23:17:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:17:49,998 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-19 23:17:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:49,999 INFO L225 Difference]: With dead ends: 40 [2020-07-19 23:17:50,000 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 23:17:50,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:17:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 23:17:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-19 23:17:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-19 23:17:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-19 23:17:50,007 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-19 23:17:50,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:50,007 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-19 23:17:50,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 23:17:50,008 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-19 23:17:50,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-19 23:17:50,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:50,009 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:50,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:50,210 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:50,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:50,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-19 23:17:50,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:50,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081998439] [2020-07-19 23:17:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a34a170 [2020-07-19 23:17:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-19 23:17:50,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081998439] [2020-07-19 23:17:50,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019060952] [2020-07-19 23:17:50,439 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@223964f5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:50,481 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@223964f5 issued 2 check-sat command(s) [2020-07-19 23:17:50,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:50,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 23:17:50,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-19 23:17:50,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:50,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-19 23:17:50,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758201837] [2020-07-19 23:17:50,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 23:17:50,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:50,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 23:17:50,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:17:50,517 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-19 23:17:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:50,642 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-19 23:17:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 23:17:50,643 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-19 23:17:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:50,644 INFO L225 Difference]: With dead ends: 43 [2020-07-19 23:17:50,644 INFO L226 Difference]: Without dead ends: 39 [2020-07-19 23:17:50,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-07-19 23:17:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-19 23:17:50,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-19 23:17:50,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-19 23:17:50,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-19 23:17:50,652 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-19 23:17:50,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:50,652 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-19 23:17:50,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 23:17:50,653 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-19 23:17:50,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-19 23:17:50,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:50,654 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:50,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:50,868 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:50,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:50,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-19 23:17:50,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:50,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703678586] [2020-07-19 23:17:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a34a170 [2020-07-19 23:17:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-19 23:17:51,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703678586] [2020-07-19 23:17:51,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166296388] [2020-07-19 23:17:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@388415df 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 [2020-07-19 23:17:51,148 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@388415df issued 2 check-sat command(s) [2020-07-19 23:17:51,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:51,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 23:17:51,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-19 23:17:51,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:51,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-19 23:17:51,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64532646] [2020-07-19 23:17:51,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 23:17:51,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:51,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 23:17:51,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:17:51,208 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-19 23:17:51,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:51,421 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-19 23:17:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 23:17:51,422 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-19 23:17:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:51,424 INFO L225 Difference]: With dead ends: 46 [2020-07-19 23:17:51,424 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 23:17:51,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-07-19 23:17:51,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 23:17:51,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-19 23:17:51,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-19 23:17:51,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-19 23:17:51,434 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-19 23:17:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:51,434 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-19 23:17:51,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 23:17:51,434 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-19 23:17:51,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-19 23:17:51,436 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:51,436 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:51,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-19 23:17:51,639 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:51,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:51,640 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-19 23:17:51,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:51,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409045110] [2020-07-19 23:17:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a34a170 [2020-07-19 23:17:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-19 23:17:51,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409045110] [2020-07-19 23:17:51,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113858784] [2020-07-19 23:17:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ef60d68 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:51,987 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3ef60d68 issued 2 check-sat command(s) [2020-07-19 23:17:51,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:51,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 23:17:51,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-19 23:17:52,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:52,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-19 23:17:52,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447322309] [2020-07-19 23:17:52,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:17:52,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:52,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:17:52,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:17:52,030 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-19 23:17:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:52,170 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-19 23:17:52,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 23:17:52,170 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-19 23:17:52,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:52,172 INFO L225 Difference]: With dead ends: 49 [2020-07-19 23:17:52,172 INFO L226 Difference]: Without dead ends: 45 [2020-07-19 23:17:52,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-07-19 23:17:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-19 23:17:52,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-19 23:17:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-19 23:17:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-19 23:17:52,179 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-19 23:17:52,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:52,180 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-19 23:17:52,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:17:52,180 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-19 23:17:52,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-19 23:17:52,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:52,182 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:52,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:52,395 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:52,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-19 23:17:52,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:52,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327220664] [2020-07-19 23:17:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a34a170 [2020-07-19 23:17:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-19 23:17:52,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327220664] [2020-07-19 23:17:52,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511556026] [2020-07-19 23:17:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13d6f8eb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:52,782 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13d6f8eb issued 2 check-sat command(s) [2020-07-19 23:17:52,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:52,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 23:17:52,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-19 23:17:52,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:52,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-07-19 23:17:52,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301238089] [2020-07-19 23:17:52,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 23:17:52,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:52,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 23:17:52,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:17:52,819 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-07-19 23:17:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:52,999 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-19 23:17:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 23:17:53,000 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-07-19 23:17:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:53,001 INFO L225 Difference]: With dead ends: 52 [2020-07-19 23:17:53,001 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 23:17:53,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-07-19 23:17:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 23:17:53,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-19 23:17:53,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 23:17:53,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-19 23:17:53,008 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-19 23:17:53,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:53,009 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-19 23:17:53,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 23:17:53,009 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-19 23:17:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-19 23:17:53,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:53,010 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:53,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:53,212 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:53,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:53,212 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-19 23:17:53,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:53,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180704378] [2020-07-19 23:17:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a34a170 [2020-07-19 23:17:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-19 23:17:53,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180704378] [2020-07-19 23:17:53,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816748850] [2020-07-19 23:17:53,617 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bff00c1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:53,674 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bff00c1 issued 2 check-sat command(s) [2020-07-19 23:17:53,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:53,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-19 23:17:53,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-19 23:17:53,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:53,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-07-19 23:17:53,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236445533] [2020-07-19 23:17:53,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 23:17:53,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:53,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 23:17:53,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:17:53,729 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2020-07-19 23:17:53,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:53,915 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-19 23:17:53,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 23:17:53,916 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-07-19 23:17:53,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:53,917 INFO L225 Difference]: With dead ends: 55 [2020-07-19 23:17:53,917 INFO L226 Difference]: Without dead ends: 51 [2020-07-19 23:17:53,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-07-19 23:17:53,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-19 23:17:53,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-19 23:17:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 23:17:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-19 23:17:53,931 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-19 23:17:53,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:53,932 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-19 23:17:53,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 23:17:53,932 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-19 23:17:53,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-19 23:17:53,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:53,934 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:54,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-19 23:17:54,149 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:54,150 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-07-19 23:17:54,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:54,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6205676] [2020-07-19 23:17:54,151 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a34a170 [2020-07-19 23:17:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-19 23:17:54,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6205676] [2020-07-19 23:17:54,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089184804] [2020-07-19 23:17:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ff43484 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:54,800 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2ff43484 issued 2 check-sat command(s) [2020-07-19 23:17:54,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:54,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-19 23:17:54,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-19 23:17:54,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:54,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-07-19 23:17:54,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358761338] [2020-07-19 23:17:54,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 23:17:54,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:54,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 23:17:54,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:17:54,844 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-07-19 23:17:55,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:55,035 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-19 23:17:55,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 23:17:55,036 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-07-19 23:17:55,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:55,037 INFO L225 Difference]: With dead ends: 58 [2020-07-19 23:17:55,037 INFO L226 Difference]: Without dead ends: 54 [2020-07-19 23:17:55,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-07-19 23:17:55,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-19 23:17:55,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-19 23:17:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-19 23:17:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-19 23:17:55,044 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-19 23:17:55,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:55,045 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-19 23:17:55,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 23:17:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-19 23:17:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-19 23:17:55,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:55,046 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:55,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 23:17:55,262 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:55,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:55,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-07-19 23:17:55,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:55,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636107062] [2020-07-19 23:17:55,264 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a34a170 [2020-07-19 23:17:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-19 23:17:55,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636107062] [2020-07-19 23:17:55,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788441912] [2020-07-19 23:17:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14877aa1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:55,760 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14877aa1 issued 2 check-sat command(s) [2020-07-19 23:17:55,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:55,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-19 23:17:55,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-19 23:17:55,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:55,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-07-19 23:17:55,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885021070] [2020-07-19 23:17:55,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 23:17:55,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:55,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 23:17:55,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:17:55,830 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 19 states. [2020-07-19 23:17:56,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:56,038 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-19 23:17:56,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 23:17:56,039 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-07-19 23:17:56,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:56,040 INFO L225 Difference]: With dead ends: 61 [2020-07-19 23:17:56,040 INFO L226 Difference]: Without dead ends: 57 [2020-07-19 23:17:56,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 23:17:56,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-19 23:17:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-19 23:17:56,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 23:17:56,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-19 23:17:56,051 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-19 23:17:56,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:56,052 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-19 23:17:56,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 23:17:56,052 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-19 23:17:56,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-19 23:17:56,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:56,053 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:56,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 23:17:56,254 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:56,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:56,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-07-19 23:17:56,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:56,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977270593] [2020-07-19 23:17:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a34a170 [2020-07-19 23:17:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-19 23:17:56,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977270593] [2020-07-19 23:17:56,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388518615] [2020-07-19 23:17:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5afcb008 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:56,909 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5afcb008 issued 2 check-sat command(s) [2020-07-19 23:17:56,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:56,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-19 23:17:56,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-19 23:17:56,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:56,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-07-19 23:17:56,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987060650] [2020-07-19 23:17:56,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 23:17:56,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:56,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 23:17:56,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-19 23:17:56,969 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2020-07-19 23:17:57,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:57,190 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-19 23:17:57,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 23:17:57,190 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-07-19 23:17:57,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:57,191 INFO L225 Difference]: With dead ends: 64 [2020-07-19 23:17:57,192 INFO L226 Difference]: Without dead ends: 60 [2020-07-19 23:17:57,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 23:17:57,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-19 23:17:57,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-19 23:17:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-19 23:17:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-19 23:17:57,199 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-19 23:17:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:57,199 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-19 23:17:57,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 23:17:57,199 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-19 23:17:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-19 23:17:57,201 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:57,201 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:57,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:57,415 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:57,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:57,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-07-19 23:17:57,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:57,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557926839] [2020-07-19 23:17:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a34a170 [2020-07-19 23:17:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:17:57,439 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:17:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:17:57,459 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:17:57,485 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-19 23:17:57,485 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 23:17:57,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-19 23:17:57,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:17:57 BoogieIcfgContainer [2020-07-19 23:17:57,561 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:17:57,569 INFO L168 Benchmark]: Toolchain (without parser) took 12115.15 ms. Allocated memory was 143.7 MB in the beginning and 353.9 MB in the end (delta: 210.2 MB). Free memory was 101.8 MB in the beginning and 121.1 MB in the end (delta: -19.3 MB). Peak memory consumption was 191.0 MB. Max. memory is 7.1 GB. [2020-07-19 23:17:57,570 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 143.7 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-19 23:17:57,574 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.13 ms. Allocated memory is still 143.7 MB. Free memory was 101.4 MB in the beginning and 91.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-19 23:17:57,575 INFO L168 Benchmark]: Boogie Preprocessor took 28.19 ms. Allocated memory is still 143.7 MB. Free memory was 91.7 MB in the beginning and 90.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:17:57,576 INFO L168 Benchmark]: RCFGBuilder took 348.42 ms. Allocated memory was 143.7 MB in the beginning and 199.8 MB in the end (delta: 56.1 MB). Free memory was 90.4 MB in the beginning and 167.5 MB in the end (delta: -77.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-19 23:17:57,577 INFO L168 Benchmark]: TraceAbstraction took 11443.88 ms. Allocated memory was 199.8 MB in the beginning and 353.9 MB in the end (delta: 154.1 MB). Free memory was 166.9 MB in the beginning and 121.1 MB in the end (delta: 45.8 MB). Peak memory consumption was 199.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:17:57,585 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 143.7 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 288.13 ms. Allocated memory is still 143.7 MB. Free memory was 101.4 MB in the beginning and 91.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.19 ms. Allocated memory is still 143.7 MB. Free memory was 91.7 MB in the beginning and 90.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 348.42 ms. Allocated memory was 143.7 MB in the beginning and 199.8 MB in the end (delta: 56.1 MB). Free memory was 90.4 MB in the beginning and 167.5 MB in the end (delta: -77.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11443.88 ms. Allocated memory was 199.8 MB in the beginning and 353.9 MB in the end (delta: 154.1 MB). Free memory was 166.9 MB in the beginning and 121.1 MB in the end (delta: 45.8 MB). Peak memory consumption was 199.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 15; [L13] int b = 0; VAL [a=15, b=0] [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=15, m=0, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=14, m=1, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=13, m=2, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=12, m=3, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=11, m=4, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=10, m=5, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=9, m=6, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=8, m=7, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=7, m=8, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=6, m=9, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=5, m=10, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=4, m=11, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=3, m=12, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=2, m=13, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=1, m=14, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=15, \old(n)=0, \result=15, m=15, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1, m=14, n=1, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2, m=13, n=2, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3, m=12, n=3, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4, m=11, n=4, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5, m=10, n=5, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6, m=9, n=6, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7, m=8, n=7, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8, m=7, n=8, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9, m=6, n=9, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10, m=5, n=10, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11, m=4, n=11, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12, m=3, n=12, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13, m=2, n=13, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14, m=1, n=14, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=15, m=0, n=15, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) VAL [a=15, b=0, sum(a, b)=15] [L14] int result = sum(a, b); [L15] COND TRUE result == a + b VAL [a=15, b=0, result=15] [L16] __VERIFIER_error() VAL [a=15, b=0, result=15] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.2s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 183 SDtfs, 488 SDslu, 767 SDs, 0 SdLazy, 558 SolverSat, 115 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1353 GetRequests, 1069 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 1740 NumberOfCodeBlocks, 1348 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 1608 ConstructedInterpolants, 0 QuantifiedInterpolants, 267360 SizeOfPredicates, 133 NumberOfNonLiveVariables, 1829 ConjunctsInSsa, 266 ConjunctsInUnsatCore, 29 InterpolantComputations, 1 PerfectInterpolantSequences, 3150/6300 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 incorrect! Received shutdown request...