/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_VARIABLES --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/id_i15_o15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:26:12,120 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 01:26:12,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:26:12,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:26:12,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:26:12,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:26:12,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:26:12,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:26:12,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:26:12,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:26:12,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:26:12,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:26:12,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:26:12,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:26:12,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:26:12,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:26:12,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:26:12,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:26:12,176 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 [2020-07-20 01:26:12,191 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:26:12,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:26:12,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:26:12,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:26:12,193 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:26:12,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:26:12,194 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:26:12,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:26:12,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:26:12,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:26:12,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:26:12,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:26:12,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:26:12,195 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:26:12,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:26:12,195 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:26:12,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:26:12,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:26:12,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:26:12,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:26:12,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:26:12,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:26:12,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:26:12,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:26:12,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:26:12,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:26:12,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:26:12,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:26:12,198 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:26:12,198 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_VARIABLES 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 [2020-07-20 01:26:12,503 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:26:12,519 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:26:12,523 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:26:12,525 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:26:12,525 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:26:12,526 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-07-20 01:26:12,593 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ac5115c2/d78bf53bdd694425b5eb4ae0ad11fec2/FLAG6325ecab1 [2020-07-20 01:26:13,053 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:26:13,054 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-07-20 01:26:13,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ac5115c2/d78bf53bdd694425b5eb4ae0ad11fec2/FLAG6325ecab1 [2020-07-20 01:26:13,481 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ac5115c2/d78bf53bdd694425b5eb4ae0ad11fec2 [2020-07-20 01:26:13,493 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:26:13,496 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:26:13,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:26:13,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:26:13,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:26:13,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:26:13" (1/1) ... [2020-07-20 01:26:13,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@295fc13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:13, skipping insertion in model container [2020-07-20 01:26:13,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:26:13" (1/1) ... [2020-07-20 01:26:13,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:26:13,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:26:13,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:26:13,719 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:26:13,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:26:13,751 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:26:13,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:13 WrapperNode [2020-07-20 01:26:13,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:26:13,753 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:26:13,753 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:26:13,753 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:26:13,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:13" (1/1) ... [2020-07-20 01:26:13,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:13" (1/1) ... [2020-07-20 01:26:13,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:13" (1/1) ... [2020-07-20 01:26:13,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:13" (1/1) ... [2020-07-20 01:26:13,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:13" (1/1) ... [2020-07-20 01:26:13,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:13" (1/1) ... [2020-07-20 01:26:13,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:13" (1/1) ... [2020-07-20 01:26:13,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:26:13,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:26:13,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:26:13,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:26:13,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:13" (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 [2020-07-20 01:26:13,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:26:13,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:26:13,955 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-20 01:26:13,955 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:26:13,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:26:13,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:26:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-20 01:26:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:26:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:26:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:26:14,132 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:26:14,133 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 01:26:14,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:26:14 BoogieIcfgContainer [2020-07-20 01:26:14,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:26:14,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:26:14,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:26:14,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:26:14,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:26:13" (1/3) ... [2020-07-20 01:26:14,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba74247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:26:14, skipping insertion in model container [2020-07-20 01:26:14,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:13" (2/3) ... [2020-07-20 01:26:14,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba74247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:26:14, skipping insertion in model container [2020-07-20 01:26:14,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:26:14" (3/3) ... [2020-07-20 01:26:14,147 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2020-07-20 01:26:14,159 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:26:14,167 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:26:14,183 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:26:14,210 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:26:14,210 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:26:14,210 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:26:14,210 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:26:14,211 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:26:14,211 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:26:14,211 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:26:14,211 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:26:14,232 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 01:26:14,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 01:26:14,239 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:14,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:14,241 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:14,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:14,248 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-20 01:26:14,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:14,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867157302] [2020-07-20 01:26:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:26:14,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867157302] [2020-07-20 01:26:14,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:26:14,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:26:14,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205855868] [2020-07-20 01:26:14,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:26:14,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:14,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:26:14,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:26:14,703 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 01:26:14,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:14,814 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 01:26:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:26:14,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 01:26:14,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:14,829 INFO L225 Difference]: With dead ends: 30 [2020-07-20 01:26:14,830 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 01:26:14,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:26:14,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 01:26:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 01:26:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 01:26:14,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 01:26:14,911 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 01:26:14,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:14,912 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 01:26:14,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:26:14,914 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 01:26:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 01:26:14,921 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:14,921 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:14,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:26:14,922 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:14,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:14,923 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-20 01:26:14,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:14,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589892772] [2020-07-20 01:26:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:26:15,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589892772] [2020-07-20 01:26:15,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525936487] [2020-07-20 01:26:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4916e965 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:15,169 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4916e965 issued 3 check-sat command(s) [2020-07-20 01:26:15,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:15,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:26:15,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:26:15,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:15,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-20 01:26:15,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493966202] [2020-07-20 01:26:15,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:26:15,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:15,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:26:15,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:26:15,282 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-20 01:26:15,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:15,352 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 01:26:15,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:26:15,353 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-20 01:26:15,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:15,354 INFO L225 Difference]: With dead ends: 25 [2020-07-20 01:26:15,355 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 01:26:15,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:26:15,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 01:26:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 01:26:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 01:26:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 01:26:15,364 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 01:26:15,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:15,365 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 01:26:15,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:26:15,365 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 01:26:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 01:26:15,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:15,367 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:15,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 01:26:15,583 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:15,584 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-20 01:26:15,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:15,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778776281] [2020-07-20 01:26:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 01:26:15,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778776281] [2020-07-20 01:26:15,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660976811] [2020-07-20 01:26:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@633ada6a 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 [2020-07-20 01:26:15,767 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@633ada6a issued 3 check-sat command(s) [2020-07-20 01:26:15,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:15,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 01:26:15,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 01:26:15,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:15,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 01:26:15,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326711664] [2020-07-20 01:26:15,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:26:15,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:15,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:26:15,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:26:15,817 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-07-20 01:26:15,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:15,893 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 01:26:15,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:26:15,894 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-07-20 01:26:15,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:15,895 INFO L225 Difference]: With dead ends: 28 [2020-07-20 01:26:15,896 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 01:26:15,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-07-20 01:26:15,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 01:26:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 01:26:15,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 01:26:15,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 01:26:15,904 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 01:26:15,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:15,905 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 01:26:15,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:26:15,905 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 01:26:15,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 01:26:15,906 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:15,907 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:16,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:16,122 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:16,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:16,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-20 01:26:16,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:16,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805628669] [2020-07-20 01:26:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 01:26:16,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805628669] [2020-07-20 01:26:16,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376505998] [2020-07-20 01:26:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75181032 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:16,367 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75181032 issued 3 check-sat command(s) [2020-07-20 01:26:16,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:16,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 01:26:16,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 01:26:16,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:16,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-20 01:26:16,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483266292] [2020-07-20 01:26:16,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 01:26:16,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:16,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 01:26:16,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:26:16,412 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-07-20 01:26:16,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:16,511 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 01:26:16,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:26:16,512 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-20 01:26:16,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:16,513 INFO L225 Difference]: With dead ends: 31 [2020-07-20 01:26:16,513 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 01:26:16,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:26:16,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 01:26:16,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 01:26:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 01:26:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 01:26:16,521 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 01:26:16,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:16,522 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 01:26:16,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 01:26:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 01:26:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 01:26:16,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:16,523 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:16,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:16,738 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:16,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:16,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-20 01:26:16,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:16,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348469764] [2020-07-20 01:26:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 01:26:16,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348469764] [2020-07-20 01:26:16,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116095693] [2020-07-20 01:26:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3599de48 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 [2020-07-20 01:26:16,937 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3599de48 issued 3 check-sat command(s) [2020-07-20 01:26:16,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:16,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 01:26:16,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 01:26:16,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:16,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-07-20 01:26:16,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151551186] [2020-07-20 01:26:16,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 01:26:16,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:16,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 01:26:16,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:26:16,986 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-07-20 01:26:17,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:17,084 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 01:26:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:26:17,087 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-07-20 01:26:17,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:17,090 INFO L225 Difference]: With dead ends: 34 [2020-07-20 01:26:17,090 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 01:26:17,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-07-20 01:26:17,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 01:26:17,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 01:26:17,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 01:26:17,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 01:26:17,107 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 01:26:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:17,110 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 01:26:17,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 01:26:17,110 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 01:26:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 01:26:17,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:17,115 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:17,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:17,316 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:17,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:17,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-20 01:26:17,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:17,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156494815] [2020-07-20 01:26:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 01:26:17,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156494815] [2020-07-20 01:26:17,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915293505] [2020-07-20 01:26:17,517 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1991453d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:17,553 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1991453d issued 3 check-sat command(s) [2020-07-20 01:26:17,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:17,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 01:26:17,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 01:26:17,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:17,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-07-20 01:26:17,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143026498] [2020-07-20 01:26:17,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 01:26:17,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:17,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 01:26:17,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-20 01:26:17,619 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-07-20 01:26:17,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:17,741 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 01:26:17,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 01:26:17,742 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-07-20 01:26:17,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:17,743 INFO L225 Difference]: With dead ends: 37 [2020-07-20 01:26:17,744 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 01:26:17,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-07-20 01:26:17,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 01:26:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 01:26:17,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 01:26:17,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 01:26:17,751 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 01:26:17,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:17,752 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 01:26:17,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 01:26:17,752 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 01:26:17,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 01:26:17,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:17,754 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:17,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 01:26:17,969 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:17,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:17,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-20 01:26:17,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:17,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691159677] [2020-07-20 01:26:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 01:26:18,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691159677] [2020-07-20 01:26:18,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347064121] [2020-07-20 01:26:18,156 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79d2936a 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 [2020-07-20 01:26:18,198 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79d2936a issued 3 check-sat command(s) [2020-07-20 01:26:18,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:18,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 01:26:18,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 01:26:18,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:18,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-20 01:26:18,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965591408] [2020-07-20 01:26:18,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 01:26:18,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:18,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 01:26:18,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:26:18,275 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-07-20 01:26:18,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:18,389 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 01:26:18,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 01:26:18,392 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-07-20 01:26:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:18,393 INFO L225 Difference]: With dead ends: 40 [2020-07-20 01:26:18,393 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 01:26:18,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-07-20 01:26:18,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 01:26:18,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 01:26:18,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 01:26:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 01:26:18,401 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 01:26:18,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:18,401 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 01:26:18,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 01:26:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 01:26:18,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 01:26:18,403 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:18,403 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:18,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:18,617 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:18,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:18,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-20 01:26:18,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:18,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933083692] [2020-07-20 01:26:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 01:26:18,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933083692] [2020-07-20 01:26:18,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676660939] [2020-07-20 01:26:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d1e9391 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:18,916 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2d1e9391 issued 3 check-sat command(s) [2020-07-20 01:26:18,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:18,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 01:26:18,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 01:26:18,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:18,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-07-20 01:26:18,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882786211] [2020-07-20 01:26:18,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 01:26:18,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:18,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 01:26:18,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:26:18,996 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-07-20 01:26:19,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:19,124 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 01:26:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 01:26:19,124 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-07-20 01:26:19,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:19,126 INFO L225 Difference]: With dead ends: 43 [2020-07-20 01:26:19,126 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 01:26:19,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-07-20 01:26:19,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 01:26:19,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 01:26:19,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 01:26:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 01:26:19,141 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 01:26:19,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:19,144 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 01:26:19,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 01:26:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 01:26:19,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 01:26:19,145 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:19,146 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:19,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:19,347 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:19,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-20 01:26:19,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:19,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675645820] [2020-07-20 01:26:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 01:26:19,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675645820] [2020-07-20 01:26:19,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186604562] [2020-07-20 01:26:19,591 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ae3fee3 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 [2020-07-20 01:26:19,628 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ae3fee3 issued 3 check-sat command(s) [2020-07-20 01:26:19,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:19,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 01:26:19,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 01:26:19,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:19,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-20 01:26:19,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462087762] [2020-07-20 01:26:19,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 01:26:19,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:19,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 01:26:19,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-20 01:26:19,686 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-07-20 01:26:19,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:19,820 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 01:26:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 01:26:19,821 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-07-20 01:26:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:19,822 INFO L225 Difference]: With dead ends: 46 [2020-07-20 01:26:19,823 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 01:26:19,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-07-20 01:26:19,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 01:26:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 01:26:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 01:26:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 01:26:19,830 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 01:26:19,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:19,831 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 01:26:19,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 01:26:19,831 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 01:26:19,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 01:26:19,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:19,833 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:20,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 01:26:20,044 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:20,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:20,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-20 01:26:20,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:20,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195226411] [2020-07-20 01:26:20,046 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 01:26:20,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195226411] [2020-07-20 01:26:20,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533189040] [2020-07-20 01:26:20,382 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2903e10d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:20,452 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2903e10d issued 3 check-sat command(s) [2020-07-20 01:26:20,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:20,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 01:26:20,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 01:26:20,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:20,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-07-20 01:26:20,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358381715] [2020-07-20 01:26:20,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 01:26:20,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:20,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 01:26:20,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 01:26:20,553 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-07-20 01:26:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:20,748 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 01:26:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 01:26:20,750 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-07-20 01:26:20,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:20,754 INFO L225 Difference]: With dead ends: 49 [2020-07-20 01:26:20,755 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 01:26:20,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-07-20 01:26:20,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 01:26:20,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 01:26:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 01:26:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 01:26:20,770 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 01:26:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:20,771 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 01:26:20,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 01:26:20,771 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 01:26:20,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 01:26:20,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:20,776 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:20,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:20,996 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:20,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:20,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-20 01:26:20,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:20,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474219556] [2020-07-20 01:26:20,998 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 01:26:21,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474219556] [2020-07-20 01:26:21,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138902990] [2020-07-20 01:26:21,383 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5afde110 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 [2020-07-20 01:26:21,434 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5afde110 issued 3 check-sat command(s) [2020-07-20 01:26:21,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:21,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 01:26:21,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 01:26:21,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:21,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-07-20 01:26:21,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905130968] [2020-07-20 01:26:21,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 01:26:21,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:21,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 01:26:21,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-20 01:26:21,506 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-07-20 01:26:21,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:21,684 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-20 01:26:21,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 01:26:21,685 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-07-20 01:26:21,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:21,687 INFO L225 Difference]: With dead ends: 52 [2020-07-20 01:26:21,687 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 01:26:21,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-07-20 01:26:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 01:26:21,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 01:26:21,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 01:26:21,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-20 01:26:21,702 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-20 01:26:21,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:21,703 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-20 01:26:21,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 01:26:21,704 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-20 01:26:21,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 01:26:21,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:21,706 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:21,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:21,920 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:21,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:21,921 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-07-20 01:26:21,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:21,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010935973] [2020-07-20 01:26:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 01:26:22,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010935973] [2020-07-20 01:26:22,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57022802] [2020-07-20 01:26:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e7b1355 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:22,356 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e7b1355 issued 3 check-sat command(s) [2020-07-20 01:26:22,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:22,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 01:26:22,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 01:26:22,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:22,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-07-20 01:26:22,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812615580] [2020-07-20 01:26:22,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 01:26:22,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:22,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 01:26:22,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-20 01:26:22,429 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-07-20 01:26:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:22,639 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-20 01:26:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 01:26:22,639 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-07-20 01:26:22,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:22,640 INFO L225 Difference]: With dead ends: 55 [2020-07-20 01:26:22,641 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 01:26:22,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-07-20 01:26:22,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 01:26:22,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 01:26:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 01:26:22,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-20 01:26:22,658 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-20 01:26:22,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:22,659 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-20 01:26:22,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 01:26:22,660 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-20 01:26:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 01:26:22,661 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:22,662 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:22,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 01:26:22,877 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:22,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:22,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-07-20 01:26:22,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:22,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066812337] [2020-07-20 01:26:22,878 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 01:26:23,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066812337] [2020-07-20 01:26:23,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823267030] [2020-07-20 01:26:23,307 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4338033d 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 [2020-07-20 01:26:23,349 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4338033d issued 3 check-sat command(s) [2020-07-20 01:26:23,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:23,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 01:26:23,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 01:26:23,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:23,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-07-20 01:26:23,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057841591] [2020-07-20 01:26:23,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 01:26:23,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:23,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 01:26:23,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-20 01:26:23,412 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-07-20 01:26:23,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:23,627 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-20 01:26:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 01:26:23,628 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-07-20 01:26:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:23,629 INFO L225 Difference]: With dead ends: 58 [2020-07-20 01:26:23,629 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 01:26:23,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2020-07-20 01:26:23,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 01:26:23,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-20 01:26:23,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 01:26:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-20 01:26:23,648 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-20 01:26:23,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:23,648 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-20 01:26:23,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 01:26:23,648 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-20 01:26:23,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-20 01:26:23,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:23,650 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:23,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 01:26:23,852 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:23,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:23,852 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-07-20 01:26:23,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:23,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689571241] [2020-07-20 01:26:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 01:26:24,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689571241] [2020-07-20 01:26:24,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899177237] [2020-07-20 01:26:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@42bd209d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:24,402 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@42bd209d issued 3 check-sat command(s) [2020-07-20 01:26:24,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:24,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 01:26:24,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 01:26:24,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:24,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-07-20 01:26:24,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198224580] [2020-07-20 01:26:24,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 01:26:24,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:24,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 01:26:24,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-20 01:26:24,480 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-07-20 01:26:24,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:24,718 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-20 01:26:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 01:26:24,720 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-07-20 01:26:24,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:24,721 INFO L225 Difference]: With dead ends: 61 [2020-07-20 01:26:24,721 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 01:26:24,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 01:26:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 01:26:24,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 01:26:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 01:26:24,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-20 01:26:24,734 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-20 01:26:24,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:24,736 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-20 01:26:24,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 01:26:24,736 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-20 01:26:24,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-20 01:26:24,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:24,740 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:24,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 01:26:24,954 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:24,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:24,954 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-07-20 01:26:24,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:24,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658503578] [2020-07-20 01:26:24,955 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 01:26:25,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658503578] [2020-07-20 01:26:25,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828955899] [2020-07-20 01:26:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a9ed31e 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 [2020-07-20 01:26:25,561 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a9ed31e issued 3 check-sat command(s) [2020-07-20 01:26:25,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:25,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 01:26:25,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 01:26:25,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:25,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-07-20 01:26:25,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526326731] [2020-07-20 01:26:25,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 01:26:25,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:25,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 01:26:25,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-20 01:26:25,631 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-07-20 01:26:25,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:25,850 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-20 01:26:25,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 01:26:25,850 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-07-20 01:26:25,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:25,851 INFO L225 Difference]: With dead ends: 64 [2020-07-20 01:26:25,852 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 01:26:25,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 01:26:25,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 01:26:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 01:26:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 01:26:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-20 01:26:25,863 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-20 01:26:25,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:25,864 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-20 01:26:25,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 01:26:25,865 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-20 01:26:25,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-20 01:26:25,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:25,866 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:26,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:26,080 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:26,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-07-20 01:26:26,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:26,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073733228] [2020-07-20 01:26:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 01:26:27,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073733228] [2020-07-20 01:26:27,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501217410] [2020-07-20 01:26:27,380 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f561116 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:27,429 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f561116 issued 4 check-sat command(s) [2020-07-20 01:26:27,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:27,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 67 conjunts are in the unsatisfiable core [2020-07-20 01:26:27,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 01:26:27,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:27,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2020-07-20 01:26:27,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566403502] [2020-07-20 01:26:27,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 01:26:27,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:27,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 01:26:27,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 01:26:27,597 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-07-20 01:26:28,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:28,117 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-20 01:26:28,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-20 01:26:28,118 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-07-20 01:26:28,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:28,119 INFO L225 Difference]: With dead ends: 67 [2020-07-20 01:26:28,119 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 01:26:28,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 134 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 01:26:28,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 01:26:28,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-20 01:26:28,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 01:26:28,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-20 01:26:28,131 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-20 01:26:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:28,137 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-20 01:26:28,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 01:26:28,137 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-20 01:26:28,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 01:26:28,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:28,140 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:28,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 01:26:28,341 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:28,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:28,342 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-07-20 01:26:28,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:28,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971152519] [2020-07-20 01:26:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dd29327 [2020-07-20 01:26:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 32 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-20 01:26:29,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971152519] [2020-07-20 01:26:29,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321812662] [2020-07-20 01:26:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@46cf5bae No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:29,113 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@46cf5bae issued 3 check-sat command(s) [2020-07-20 01:26:29,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:29,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-20 01:26:29,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-20 01:26:29,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:26:29,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 24 [2020-07-20 01:26:29,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944197462] [2020-07-20 01:26:29,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 01:26:29,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:29,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 01:26:29,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2020-07-20 01:26:29,217 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2020-07-20 01:26:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:29,592 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-07-20 01:26:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 01:26:29,593 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-07-20 01:26:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:29,595 INFO L225 Difference]: With dead ends: 63 [2020-07-20 01:26:29,595 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 01:26:29,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 01:26:29,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 01:26:29,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 01:26:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 01:26:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 01:26:29,602 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2020-07-20 01:26:29,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:29,602 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 01:26:29,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 01:26:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 01:26:29,602 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 01:26:29,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 01:26:29,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 01:26:29,838 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 01:26:29,838 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:26:29,838 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:26:29,838 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 01:26:29,838 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 01:26:29,838 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 01:26:29,839 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-07-20 01:26:29,839 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-07-20 01:26:29,839 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-20 01:26:29,839 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-20 01:26:29,839 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-07-20 01:26:29,840 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 15 main_~input~0) (<= main_~input~0 15)) [2020-07-20 01:26:29,840 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-20 01:26:29,840 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-07-20 01:26:29,840 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-20 01:26:29,840 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-20 01:26:29,841 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-07-20 01:26:29,841 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-07-20 01:26:29,841 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 01:26:29,841 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-20 01:26:29,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:26:29 BoogieIcfgContainer [2020-07-20 01:26:29,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:26:29,852 INFO L168 Benchmark]: Toolchain (without parser) took 16356.22 ms. Allocated memory was 137.9 MB in the beginning and 406.8 MB in the end (delta: 269.0 MB). Free memory was 102.7 MB in the beginning and 94.3 MB in the end (delta: 8.4 MB). Peak memory consumption was 277.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:29,852 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory is still 120.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 01:26:29,853 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.39 ms. Allocated memory is still 137.9 MB. Free memory was 102.3 MB in the beginning and 93.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:29,853 INFO L168 Benchmark]: Boogie Preprocessor took 27.20 ms. Allocated memory is still 137.9 MB. Free memory was 93.1 MB in the beginning and 91.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:29,854 INFO L168 Benchmark]: RCFGBuilder took 357.19 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 91.4 MB in the beginning and 168.8 MB in the end (delta: -77.4 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:29,855 INFO L168 Benchmark]: TraceAbstraction took 15709.71 ms. Allocated memory was 201.3 MB in the beginning and 406.8 MB in the end (delta: 205.5 MB). Free memory was 168.8 MB in the beginning and 94.3 MB in the end (delta: 74.5 MB). Peak memory consumption was 280.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:29,858 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 137.9 MB. Free memory is still 120.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.39 ms. Allocated memory is still 137.9 MB. Free memory was 102.3 MB in the beginning and 93.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.20 ms. Allocated memory is still 137.9 MB. Free memory was 93.1 MB in the beginning and 91.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 357.19 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 91.4 MB in the beginning and 168.8 MB in the end (delta: -77.4 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15709.71 ms. Allocated memory was 201.3 MB in the beginning and 406.8 MB in the end (delta: 205.5 MB). Free memory was 168.8 MB in the beginning and 94.3 MB in the end (delta: 74.5 MB). Peak memory consumption was 280.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.5s, OverallIterations: 17, TraceHistogramMax: 17, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 285 SDtfs, 526 SDslu, 2176 SDs, 0 SdLazy, 1348 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1705 GetRequests, 1331 SyntacticMatches, 4 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 2061 NumberOfCodeBlocks, 1854 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 2028 ConstructedInterpolants, 0 QuantifiedInterpolants, 407376 SizeOfPredicates, 152 NumberOfNonLiveVariables, 2093 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 33 InterpolantComputations, 2 PerfectInterpolantSequences, 5376/9248 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...