/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:15:52,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:15:52,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:15:52,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:15:52,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:15:52,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:15:52,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:15:52,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:15:52,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:15:52,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:15:52,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:15:52,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:15:52,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:15:52,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:15:52,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:15:52,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:15:52,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:15:52,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:15:52,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:15:52,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:15:52,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:15:52,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:15:52,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:15:52,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:15:52,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 11:15:52,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 11:15:52,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 11:15:52,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 11:15:52,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 11:15:52,223 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 11:15:52,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:15:52,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:15:52,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:15:52,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:15:52,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:15:52,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:15:52,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:15:52,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:15:52,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:15:52,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:15:52,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:15:52,231 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 [2020-07-07 11:15:52,252 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:15:52,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:15:52,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:15:52,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:15:52,254 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:15:52,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:15:52,255 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:15:52,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:15:52,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:15:52,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:15:52,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:15:52,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:15:52,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:15:52,256 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:15:52,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:15:52,257 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:15:52,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:15:52,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:15:52,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:15:52,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:15:52,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:15:52,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:15:52,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:15:52,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:15:52,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:15:52,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:15:52,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:15:52,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:15:52,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:15:52,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:15:52,539 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:15:52,556 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:15:52,560 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:15:52,561 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:15:52,562 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:15:52,563 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-07-07 11:15:52,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1abea5d3f/a5c8242880d34b3aa1ff60e33020bbe4/FLAGaaa6d4c4f [2020-07-07 11:15:53,099 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:15:53,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_8.c [2020-07-07 11:15:53,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1abea5d3f/a5c8242880d34b3aa1ff60e33020bbe4/FLAGaaa6d4c4f [2020-07-07 11:15:53,463 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1abea5d3f/a5c8242880d34b3aa1ff60e33020bbe4 [2020-07-07 11:15:53,472 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:15:53,474 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:15:53,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:15:53,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:15:53,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:15:53,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:15:53" (1/1) ... [2020-07-07 11:15:53,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74099987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:53, skipping insertion in model container [2020-07-07 11:15:53,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:15:53" (1/1) ... [2020-07-07 11:15:53,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:15:53,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:15:53,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:15:53,721 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:15:53,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:15:53,766 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:15:53,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:53 WrapperNode [2020-07-07 11:15:53,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:15:53,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:15:53,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:15:53,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:15:53,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:53" (1/1) ... [2020-07-07 11:15:53,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:53" (1/1) ... [2020-07-07 11:15:53,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:53" (1/1) ... [2020-07-07 11:15:53,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:53" (1/1) ... [2020-07-07 11:15:53,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:53" (1/1) ... [2020-07-07 11:15:53,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:53" (1/1) ... [2020-07-07 11:15:53,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:53" (1/1) ... [2020-07-07 11:15:53,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:15:53,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:15:53,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:15:53,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:15:53,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:53" (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 [2020-07-07 11:15:54,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:15:54,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:15:54,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:15:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:15:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:15:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:15:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:15:54,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:15:54,325 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:15:54,325 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 11:15:54,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:15:54 BoogieIcfgContainer [2020-07-07 11:15:54,329 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:15:54,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:15:54,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:15:54,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:15:54,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:15:53" (1/3) ... [2020-07-07 11:15:54,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70901e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:15:54, skipping insertion in model container [2020-07-07 11:15:54,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:15:53" (2/3) ... [2020-07-07 11:15:54,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70901e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:15:54, skipping insertion in model container [2020-07-07 11:15:54,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:15:54" (3/3) ... [2020-07-07 11:15:54,337 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-07-07 11:15:54,348 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:15:54,355 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:15:54,368 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:15:54,392 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:15:54,392 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:15:54,393 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:15:54,393 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:15:54,393 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:15:54,393 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:15:54,393 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:15:54,393 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:15:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-07 11:15:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-07 11:15:54,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:54,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:54,421 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:54,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:54,428 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-07-07 11:15:54,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:54,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973012506] [2020-07-07 11:15:54,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:54,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973012506] [2020-07-07 11:15:54,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:54,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:54,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413453872] [2020-07-07 11:15:54,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:54,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:54,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:54,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:54,651 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-07-07 11:15:54,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:54,745 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-07-07 11:15:54,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:54,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-07 11:15:54,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:54,763 INFO L225 Difference]: With dead ends: 75 [2020-07-07 11:15:54,764 INFO L226 Difference]: Without dead ends: 60 [2020-07-07 11:15:54,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:54,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-07 11:15:54,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-07-07 11:15:54,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 11:15:54,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-07-07 11:15:54,821 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-07-07 11:15:54,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:54,821 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-07-07 11:15:54,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:54,822 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-07-07 11:15:54,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-07 11:15:54,823 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:54,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:54,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:15:54,824 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:54,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:54,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-07-07 11:15:54,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:54,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518106276] [2020-07-07 11:15:54,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:54,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518106276] [2020-07-07 11:15:54,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:54,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:54,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187722852] [2020-07-07 11:15:54,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:54,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:54,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:54,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:54,915 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-07-07 11:15:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:54,947 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-07-07 11:15:54,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:54,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-07 11:15:54,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:54,950 INFO L225 Difference]: With dead ends: 97 [2020-07-07 11:15:54,950 INFO L226 Difference]: Without dead ends: 60 [2020-07-07 11:15:54,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-07 11:15:54,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-07-07 11:15:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-07 11:15:54,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-07-07 11:15:54,964 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-07-07 11:15:54,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:54,964 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-07-07 11:15:54,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:54,964 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-07-07 11:15:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 11:15:54,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:54,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:54,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:15:54,966 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:54,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:54,967 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-07-07 11:15:54,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:54,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893131970] [2020-07-07 11:15:54,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:55,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893131970] [2020-07-07 11:15:55,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:55,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:55,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98875603] [2020-07-07 11:15:55,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:55,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:55,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:55,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,064 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-07-07 11:15:55,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:55,090 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-07-07 11:15:55,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:55,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-07 11:15:55,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:55,093 INFO L225 Difference]: With dead ends: 90 [2020-07-07 11:15:55,093 INFO L226 Difference]: Without dead ends: 63 [2020-07-07 11:15:55,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-07 11:15:55,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-07-07 11:15:55,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-07 11:15:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-07-07 11:15:55,109 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-07-07 11:15:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:55,110 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-07-07 11:15:55,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:55,110 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-07-07 11:15:55,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 11:15:55,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:55,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:55,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:15:55,112 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:55,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:55,112 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-07-07 11:15:55,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:55,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937908558] [2020-07-07 11:15:55,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:55,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937908558] [2020-07-07 11:15:55,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:55,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:55,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726875391] [2020-07-07 11:15:55,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:55,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:55,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:55,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,160 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-07-07 11:15:55,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:55,183 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-07-07 11:15:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:55,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-07 11:15:55,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:55,186 INFO L225 Difference]: With dead ends: 112 [2020-07-07 11:15:55,186 INFO L226 Difference]: Without dead ends: 110 [2020-07-07 11:15:55,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-07 11:15:55,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-07-07 11:15:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-07 11:15:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-07-07 11:15:55,202 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-07-07 11:15:55,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:55,205 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-07-07 11:15:55,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:55,206 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-07-07 11:15:55,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 11:15:55,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:55,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:55,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 11:15:55,207 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:55,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:55,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-07-07 11:15:55,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:55,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308811885] [2020-07-07 11:15:55,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:55,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308811885] [2020-07-07 11:15:55,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:55,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:55,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611657147] [2020-07-07 11:15:55,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:55,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:55,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:55,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,274 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-07-07 11:15:55,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:55,304 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-07-07 11:15:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:55,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-07 11:15:55,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:55,308 INFO L225 Difference]: With dead ends: 184 [2020-07-07 11:15:55,308 INFO L226 Difference]: Without dead ends: 112 [2020-07-07 11:15:55,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-07 11:15:55,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-07-07 11:15:55,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-07-07 11:15:55,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-07-07 11:15:55,323 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-07-07 11:15:55,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:55,324 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-07-07 11:15:55,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:55,324 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-07-07 11:15:55,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-07 11:15:55,325 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:55,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:55,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 11:15:55,326 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:55,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:55,327 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-07-07 11:15:55,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:55,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746436890] [2020-07-07 11:15:55,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:55,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746436890] [2020-07-07 11:15:55,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:55,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:55,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571427484] [2020-07-07 11:15:55,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:55,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:55,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:55,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,367 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-07-07 11:15:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:55,389 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-07-07 11:15:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:55,390 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-07 11:15:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:55,391 INFO L225 Difference]: With dead ends: 165 [2020-07-07 11:15:55,392 INFO L226 Difference]: Without dead ends: 114 [2020-07-07 11:15:55,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-07 11:15:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-07-07 11:15:55,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-07 11:15:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-07-07 11:15:55,406 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-07-07 11:15:55,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:55,407 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-07-07 11:15:55,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-07-07 11:15:55,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-07 11:15:55,409 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:55,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:55,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 11:15:55,409 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:55,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:55,410 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-07-07 11:15:55,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:55,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844925522] [2020-07-07 11:15:55,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:55,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844925522] [2020-07-07 11:15:55,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:55,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:55,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582732734] [2020-07-07 11:15:55,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:55,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:55,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:55,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,451 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-07-07 11:15:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:55,473 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-07-07 11:15:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:55,473 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-07 11:15:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:55,476 INFO L225 Difference]: With dead ends: 204 [2020-07-07 11:15:55,476 INFO L226 Difference]: Without dead ends: 202 [2020-07-07 11:15:55,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-07 11:15:55,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-07-07 11:15:55,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-07 11:15:55,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-07-07 11:15:55,494 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-07-07 11:15:55,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:55,495 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-07-07 11:15:55,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:55,495 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-07-07 11:15:55,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-07 11:15:55,497 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:55,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:55,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 11:15:55,498 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:55,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:55,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-07-07 11:15:55,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:55,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812274494] [2020-07-07 11:15:55,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:55,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812274494] [2020-07-07 11:15:55,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:55,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:55,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137434289] [2020-07-07 11:15:55,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:55,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:55,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:55,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,571 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-07-07 11:15:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:55,623 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-07-07 11:15:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:55,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-07 11:15:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:55,626 INFO L225 Difference]: With dead ends: 352 [2020-07-07 11:15:55,626 INFO L226 Difference]: Without dead ends: 210 [2020-07-07 11:15:55,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-07 11:15:55,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-07-07 11:15:55,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-07 11:15:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-07-07 11:15:55,660 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-07-07 11:15:55,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:55,661 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-07-07 11:15:55,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-07-07 11:15:55,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 11:15:55,663 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:55,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:55,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 11:15:55,663 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:55,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:55,664 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-07-07 11:15:55,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:55,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400799552] [2020-07-07 11:15:55,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:55,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400799552] [2020-07-07 11:15:55,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:55,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:55,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612701036] [2020-07-07 11:15:55,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:55,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:55,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:55,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,736 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-07-07 11:15:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:55,757 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-07-07 11:15:55,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:55,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-07 11:15:55,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:55,759 INFO L225 Difference]: With dead ends: 312 [2020-07-07 11:15:55,759 INFO L226 Difference]: Without dead ends: 214 [2020-07-07 11:15:55,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-07 11:15:55,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-07-07 11:15:55,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-07 11:15:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-07-07 11:15:55,774 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-07-07 11:15:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:55,774 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-07-07 11:15:55,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:55,774 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-07-07 11:15:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 11:15:55,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:55,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:55,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 11:15:55,777 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:55,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:55,777 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-07-07 11:15:55,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:55,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126573930] [2020-07-07 11:15:55,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:55,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126573930] [2020-07-07 11:15:55,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:55,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:55,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861992327] [2020-07-07 11:15:55,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:55,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:55,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:55,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,806 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-07-07 11:15:55,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:55,827 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-07-07 11:15:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:55,828 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-07 11:15:55,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:55,831 INFO L225 Difference]: With dead ends: 380 [2020-07-07 11:15:55,831 INFO L226 Difference]: Without dead ends: 378 [2020-07-07 11:15:55,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-07-07 11:15:55,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-07-07 11:15:55,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-07-07 11:15:55,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-07-07 11:15:55,845 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-07-07 11:15:55,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:55,846 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-07-07 11:15:55,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:55,846 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-07-07 11:15:55,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 11:15:55,848 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:55,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:55,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 11:15:55,848 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:55,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:55,849 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-07-07 11:15:55,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:55,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036914448] [2020-07-07 11:15:55,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:55,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036914448] [2020-07-07 11:15:55,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:55,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:55,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147200464] [2020-07-07 11:15:55,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:55,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:55,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:55,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,875 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-07-07 11:15:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:55,901 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-07-07 11:15:55,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:55,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-07 11:15:55,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:55,904 INFO L225 Difference]: With dead ends: 684 [2020-07-07 11:15:55,904 INFO L226 Difference]: Without dead ends: 402 [2020-07-07 11:15:55,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-07-07 11:15:55,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-07-07 11:15:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-07-07 11:15:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-07-07 11:15:55,923 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-07-07 11:15:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:55,923 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-07-07 11:15:55,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-07-07 11:15:55,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 11:15:55,925 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:55,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:55,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 11:15:55,925 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:55,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-07-07 11:15:55,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:55,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841571547] [2020-07-07 11:15:55,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:55,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841571547] [2020-07-07 11:15:55,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:55,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:55,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305587999] [2020-07-07 11:15:55,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:55,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:55,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:55,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:55,965 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-07-07 11:15:55,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:55,996 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-07-07 11:15:55,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:55,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-07 11:15:55,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:56,001 INFO L225 Difference]: With dead ends: 600 [2020-07-07 11:15:56,002 INFO L226 Difference]: Without dead ends: 410 [2020-07-07 11:15:56,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:56,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-07-07 11:15:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-07-07 11:15:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-07-07 11:15:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-07-07 11:15:56,025 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-07-07 11:15:56,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:56,028 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-07-07 11:15:56,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:56,028 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-07-07 11:15:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 11:15:56,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:56,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:56,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 11:15:56,033 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:56,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:56,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-07-07 11:15:56,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:56,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135603645] [2020-07-07 11:15:56,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:56,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135603645] [2020-07-07 11:15:56,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:56,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:56,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726487650] [2020-07-07 11:15:56,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:56,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:56,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:56,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:56,081 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-07-07 11:15:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:56,114 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-07-07 11:15:56,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:56,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-07 11:15:56,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:56,128 INFO L225 Difference]: With dead ends: 716 [2020-07-07 11:15:56,128 INFO L226 Difference]: Without dead ends: 714 [2020-07-07 11:15:56,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:56,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-07-07 11:15:56,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-07-07 11:15:56,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-07-07 11:15:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-07-07 11:15:56,153 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-07-07 11:15:56,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:56,153 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-07-07 11:15:56,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:56,154 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-07-07 11:15:56,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-07 11:15:56,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:56,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:56,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 11:15:56,156 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:56,156 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-07-07 11:15:56,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:56,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409828766] [2020-07-07 11:15:56,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:56,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409828766] [2020-07-07 11:15:56,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:56,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:56,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826315320] [2020-07-07 11:15:56,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:56,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:56,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:56,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:56,201 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-07-07 11:15:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:56,238 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-07-07 11:15:56,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:56,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-07 11:15:56,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:56,244 INFO L225 Difference]: With dead ends: 1340 [2020-07-07 11:15:56,244 INFO L226 Difference]: Without dead ends: 778 [2020-07-07 11:15:56,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:56,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-07-07 11:15:56,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-07-07 11:15:56,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-07-07 11:15:56,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-07-07 11:15:56,275 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-07-07 11:15:56,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:56,276 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-07-07 11:15:56,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:56,276 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-07-07 11:15:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-07 11:15:56,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:56,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:56,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 11:15:56,278 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:56,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-07-07 11:15:56,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:56,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039495349] [2020-07-07 11:15:56,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:56,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039495349] [2020-07-07 11:15:56,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:56,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:56,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008343461] [2020-07-07 11:15:56,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:56,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:56,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:56,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:56,324 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-07-07 11:15:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:56,356 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-07-07 11:15:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:56,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-07 11:15:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:56,362 INFO L225 Difference]: With dead ends: 1164 [2020-07-07 11:15:56,362 INFO L226 Difference]: Without dead ends: 794 [2020-07-07 11:15:56,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:56,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-07-07 11:15:56,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-07-07 11:15:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-07-07 11:15:56,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-07-07 11:15:56,400 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-07-07 11:15:56,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:56,401 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-07-07 11:15:56,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:56,401 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-07-07 11:15:56,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-07 11:15:56,403 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:56,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:56,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 11:15:56,404 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:56,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:56,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-07-07 11:15:56,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:56,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901274899] [2020-07-07 11:15:56,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:56,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901274899] [2020-07-07 11:15:56,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:56,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:56,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023752327] [2020-07-07 11:15:56,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:56,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:56,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:56,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:56,460 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-07-07 11:15:56,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:56,499 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-07-07 11:15:56,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:56,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-07 11:15:56,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:56,508 INFO L225 Difference]: With dead ends: 1356 [2020-07-07 11:15:56,508 INFO L226 Difference]: Without dead ends: 1354 [2020-07-07 11:15:56,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:56,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-07-07 11:15:56,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-07-07 11:15:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-07-07 11:15:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-07-07 11:15:56,564 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-07-07 11:15:56,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:56,565 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-07-07 11:15:56,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:56,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-07-07 11:15:56,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-07 11:15:56,571 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:56,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:56,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 11:15:56,572 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:56,572 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-07-07 11:15:56,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:56,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480939978] [2020-07-07 11:15:56,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:56,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480939978] [2020-07-07 11:15:56,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:56,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:56,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854674125] [2020-07-07 11:15:56,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:56,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:56,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:56,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:56,602 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-07-07 11:15:56,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:56,645 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-07-07 11:15:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:56,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-07 11:15:56,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:56,653 INFO L225 Difference]: With dead ends: 2636 [2020-07-07 11:15:56,653 INFO L226 Difference]: Without dead ends: 1514 [2020-07-07 11:15:56,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:56,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-07-07 11:15:56,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-07-07 11:15:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-07-07 11:15:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-07-07 11:15:56,708 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-07-07 11:15:56,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:56,709 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-07-07 11:15:56,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-07-07 11:15:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 11:15:56,712 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:56,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:56,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 11:15:56,713 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:56,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:56,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-07-07 11:15:56,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:56,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459101817] [2020-07-07 11:15:56,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:56,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:56,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459101817] [2020-07-07 11:15:56,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:56,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:56,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313710967] [2020-07-07 11:15:56,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:56,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:56,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:56,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:56,745 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-07-07 11:15:56,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:56,789 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-07-07 11:15:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:56,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-07 11:15:56,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:56,796 INFO L225 Difference]: With dead ends: 2268 [2020-07-07 11:15:56,797 INFO L226 Difference]: Without dead ends: 1546 [2020-07-07 11:15:56,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:56,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-07-07 11:15:56,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-07-07 11:15:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-07-07 11:15:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-07-07 11:15:56,846 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-07-07 11:15:56,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:56,847 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-07-07 11:15:56,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:56,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-07-07 11:15:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 11:15:56,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:56,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:56,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-07 11:15:56,850 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:56,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:56,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-07-07 11:15:56,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:56,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674819685] [2020-07-07 11:15:56,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:56,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674819685] [2020-07-07 11:15:56,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:56,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:56,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644822904] [2020-07-07 11:15:56,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:56,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:56,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:56,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:56,873 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-07-07 11:15:56,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:56,927 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-07-07 11:15:56,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:56,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-07 11:15:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:56,940 INFO L225 Difference]: With dead ends: 2572 [2020-07-07 11:15:56,941 INFO L226 Difference]: Without dead ends: 2570 [2020-07-07 11:15:56,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:56,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-07-07 11:15:57,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-07-07 11:15:57,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-07-07 11:15:57,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-07-07 11:15:57,025 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-07-07 11:15:57,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:57,025 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-07-07 11:15:57,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:57,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-07-07 11:15:57,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 11:15:57,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:57,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:57,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-07 11:15:57,031 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:57,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:57,031 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-07-07 11:15:57,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:57,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460598449] [2020-07-07 11:15:57,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:57,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460598449] [2020-07-07 11:15:57,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:57,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:57,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340455444] [2020-07-07 11:15:57,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:57,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:57,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:57,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:57,056 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-07-07 11:15:57,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:57,197 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-07-07 11:15:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:57,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-07 11:15:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:57,214 INFO L225 Difference]: With dead ends: 5196 [2020-07-07 11:15:57,215 INFO L226 Difference]: Without dead ends: 2954 [2020-07-07 11:15:57,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-07-07 11:15:57,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-07-07 11:15:57,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-07-07 11:15:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-07-07 11:15:57,331 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-07-07 11:15:57,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:57,332 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-07-07 11:15:57,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:57,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-07-07 11:15:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 11:15:57,338 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:57,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:57,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-07 11:15:57,341 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:57,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:57,341 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-07-07 11:15:57,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:57,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839154294] [2020-07-07 11:15:57,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:57,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839154294] [2020-07-07 11:15:57,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:57,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:57,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771529515] [2020-07-07 11:15:57,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:57,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:57,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:57,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:57,376 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-07-07 11:15:57,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:57,439 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-07-07 11:15:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:57,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-07 11:15:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:57,455 INFO L225 Difference]: With dead ends: 4428 [2020-07-07 11:15:57,455 INFO L226 Difference]: Without dead ends: 3018 [2020-07-07 11:15:57,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-07-07 11:15:57,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-07-07 11:15:57,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-07-07 11:15:57,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-07-07 11:15:57,555 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-07-07 11:15:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:57,555 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-07-07 11:15:57,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:57,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-07-07 11:15:57,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 11:15:57,560 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:57,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:57,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-07 11:15:57,561 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:57,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:57,561 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-07-07 11:15:57,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:57,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200535817] [2020-07-07 11:15:57,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:57,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200535817] [2020-07-07 11:15:57,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:57,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:57,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492429279] [2020-07-07 11:15:57,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:57,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:57,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:57,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:57,597 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-07-07 11:15:57,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:57,746 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-07-07 11:15:57,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:57,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-07 11:15:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:57,760 INFO L225 Difference]: With dead ends: 8650 [2020-07-07 11:15:57,761 INFO L226 Difference]: Without dead ends: 3016 [2020-07-07 11:15:57,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:57,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-07-07 11:15:57,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-07-07 11:15:57,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-07-07 11:15:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-07-07 11:15:57,869 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-07-07 11:15:57,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:57,870 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-07-07 11:15:57,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:57,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-07-07 11:15:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 11:15:57,875 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:15:57,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:15:57,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-07 11:15:57,881 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:15:57,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:15:57,882 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-07-07 11:15:57,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:15:57,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902758640] [2020-07-07 11:15:57,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:15:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:15:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:15:57,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902758640] [2020-07-07 11:15:57,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:15:57,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:15:57,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862683128] [2020-07-07 11:15:57,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:15:57,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:15:57,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:15:57,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:57,909 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-07-07 11:15:57,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:15:57,957 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-07-07 11:15:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:15:57,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-07 11:15:57,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:15:57,958 INFO L225 Difference]: With dead ends: 3016 [2020-07-07 11:15:57,958 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 11:15:57,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:15:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 11:15:57,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 11:15:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 11:15:57,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 11:15:57,966 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-07-07 11:15:57,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:15:57,966 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 11:15:57,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:15:57,967 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 11:15:57,967 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 11:15:57,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-07 11:15:57,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 11:15:57,996 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 11:15:57,997 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:15:57,997 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:15:57,997 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 11:15:57,997 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 11:15:57,997 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:15:57,997 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-07-07 11:15:57,997 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-07-07 11:15:57,998 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-07-07 11:15:57,998 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-07-07 11:15:57,998 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-07-07 11:15:57,999 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-07-07 11:15:57,999 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-07-07 11:15:57,999 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-07-07 11:15:57,999 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-07-07 11:15:57,999 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-07-07 11:15:57,999 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-07-07 11:15:57,999 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-07-07 11:15:57,999 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-07-07 11:15:58,000 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-07-07 11:15:58,000 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-07-07 11:15:58,001 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-07-07 11:15:58,001 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-07-07 11:15:58,001 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-07-07 11:15:58,001 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-07-07 11:15:58,001 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-07-07 11:15:58,001 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-07-07 11:15:58,001 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-07-07 11:15:58,001 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-07-07 11:15:58,001 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-07-07 11:15:58,002 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-07-07 11:15:58,002 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-07-07 11:15:58,002 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-07-07 11:15:58,002 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-07-07 11:15:58,002 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-07-07 11:15:58,002 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-07-07 11:15:58,002 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-07-07 11:15:58,002 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-07-07 11:15:58,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:15:58 BoogieIcfgContainer [2020-07-07 11:15:58,015 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:15:58,018 INFO L168 Benchmark]: Toolchain (without parser) took 4542.39 ms. Allocated memory was 137.9 MB in the beginning and 300.9 MB in the end (delta: 163.1 MB). Free memory was 102.2 MB in the beginning and 196.3 MB in the end (delta: -94.1 MB). Peak memory consumption was 69.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:15:58,018 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:15:58,019 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.82 ms. Allocated memory is still 137.9 MB. Free memory was 102.0 MB in the beginning and 91.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:15:58,019 INFO L168 Benchmark]: Boogie Preprocessor took 160.01 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 91.6 MB in the beginning and 180.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:15:58,020 INFO L168 Benchmark]: RCFGBuilder took 400.96 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 162.7 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. [2020-07-07 11:15:58,021 INFO L168 Benchmark]: TraceAbstraction took 3684.44 ms. Allocated memory was 202.9 MB in the beginning and 300.9 MB in the end (delta: 98.0 MB). Free memory was 162.0 MB in the beginning and 196.3 MB in the end (delta: -34.3 MB). Peak memory consumption was 63.8 MB. Max. memory is 7.1 GB. [2020-07-07 11:15:58,032 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 291.82 ms. Allocated memory is still 137.9 MB. Free memory was 102.0 MB in the beginning and 91.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 160.01 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 91.6 MB in the beginning and 180.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 400.96 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 162.7 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3684.44 ms. Allocated memory was 202.9 MB in the beginning and 300.9 MB in the end (delta: 98.0 MB). Free memory was 162.0 MB in the beginning and 196.3 MB in the end (delta: -34.3 MB). Peak memory consumption was 63.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: 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 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 PerfectInterpolantSequences, 0/0 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...