/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:49:31,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:49:31,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:49:31,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:49:31,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:49:31,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:49:31,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:49:31,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:49:31,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:49:31,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:49:31,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:49:31,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:49:31,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:49:31,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:49:31,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:49:31,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:49:31,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:49:31,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:49:31,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:49:31,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:49:31,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:49:31,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:49:31,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:49:31,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:49:31,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-27 21:49:31,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:49:31,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:49:31,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:49:31,424 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-27 21:49:31,450 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:49:31,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:49:31,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:49:31,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:49:31,452 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:49:31,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:49:31,452 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:49:31,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:49:31,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:49:31,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:49:31,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:49:31,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:49:31,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:49:31,454 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:49:31,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:49:31,454 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:49:31,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:49:31,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:49:31,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:49:31,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:49:31,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:49:31,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:49:31,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:49:31,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:49:31,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:49:31,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:49:31,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:49:31,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:49:31,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:49:31,457 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-27 21:49:31,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:49:31,941 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:49:31,948 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:49:31,950 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:49:31,950 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:49:31,952 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-08-27 21:49:32,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d89131699/c0bcc94bbd0043a4a4cb93e9314f6c38/FLAG9c971edab [2020-08-27 21:49:32,518 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:49:32,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-08-27 21:49:32,528 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d89131699/c0bcc94bbd0043a4a4cb93e9314f6c38/FLAG9c971edab [2020-08-27 21:49:32,874 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d89131699/c0bcc94bbd0043a4a4cb93e9314f6c38 [2020-08-27 21:49:32,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:49:32,889 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:49:32,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:49:32,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:49:32,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:49:32,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:49:32" (1/1) ... [2020-08-27 21:49:32,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68e64c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:32, skipping insertion in model container [2020-08-27 21:49:32,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:49:32" (1/1) ... [2020-08-27 21:49:32,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:49:32,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:49:33,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:49:33,242 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:49:33,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:49:33,273 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:49:33,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:33 WrapperNode [2020-08-27 21:49:33,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:49:33,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:49:33,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:49:33,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:49:33,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:33" (1/1) ... [2020-08-27 21:49:33,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:33" (1/1) ... [2020-08-27 21:49:33,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:33" (1/1) ... [2020-08-27 21:49:33,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:33" (1/1) ... [2020-08-27 21:49:33,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:33" (1/1) ... [2020-08-27 21:49:33,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:33" (1/1) ... [2020-08-27 21:49:33,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:33" (1/1) ... [2020-08-27 21:49:33,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:49:33,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:49:33,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:49:33,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:49:33,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:49:33,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:49:33,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:49:33,472 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-08-27 21:49:33,473 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:49:33,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:49:33,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:49:33,473 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-08-27 21:49:33,473 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:49:33,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:49:33,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:49:33,682 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:49:33,682 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-27 21:49:33,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:49:33 BoogieIcfgContainer [2020-08-27 21:49:33,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:49:33,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:49:33,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:49:33,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:49:33,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:49:32" (1/3) ... [2020-08-27 21:49:33,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4cf838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:49:33, skipping insertion in model container [2020-08-27 21:49:33,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:33" (2/3) ... [2020-08-27 21:49:33,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4cf838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:49:33, skipping insertion in model container [2020-08-27 21:49:33,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:49:33" (3/3) ... [2020-08-27 21:49:33,699 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-08-27 21:49:33,712 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:49:33,728 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:49:33,759 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:49:33,809 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:49:33,810 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:49:33,810 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:49:33,810 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:49:33,810 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:49:33,811 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:49:33,811 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:49:33,811 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:49:33,839 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-27 21:49:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-27 21:49:33,847 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:33,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:33,850 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:33,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:33,858 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-08-27 21:49:33,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:33,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497359492] [2020-08-27 21:49:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:49:34,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497359492] [2020-08-27 21:49:34,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:49:34,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:49:34,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836153676] [2020-08-27 21:49:34,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:49:34,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:34,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:49:34,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:49:34,189 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-08-27 21:49:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:34,312 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-08-27 21:49:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:49:34,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-27 21:49:34,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:34,326 INFO L225 Difference]: With dead ends: 35 [2020-08-27 21:49:34,326 INFO L226 Difference]: Without dead ends: 21 [2020-08-27 21:49:34,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:49:34,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-27 21:49:34,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-27 21:49:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-27 21:49:34,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-27 21:49:34,380 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-08-27 21:49:34,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:34,381 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-27 21:49:34,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:49:34,381 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-27 21:49:34,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-27 21:49:34,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:34,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:34,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:49:34,384 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:34,385 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-08-27 21:49:34,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:34,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353089029] [2020-08-27 21:49:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:49:34,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353089029] [2020-08-27 21:49:34,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:49:34,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:49:34,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99251693] [2020-08-27 21:49:34,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:49:34,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:34,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:49:34,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:49:34,464 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-08-27 21:49:34,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:34,540 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-08-27 21:49:34,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:49:34,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-27 21:49:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:34,543 INFO L225 Difference]: With dead ends: 27 [2020-08-27 21:49:34,543 INFO L226 Difference]: Without dead ends: 23 [2020-08-27 21:49:34,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:49:34,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-27 21:49:34,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-08-27 21:49:34,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-27 21:49:34,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-08-27 21:49:34,553 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-08-27 21:49:34,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:34,553 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-08-27 21:49:34,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:49:34,554 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-08-27 21:49:34,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-27 21:49:34,555 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:34,555 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:34,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:49:34,556 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:34,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:34,557 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-08-27 21:49:34,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:34,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509589757] [2020-08-27 21:49:34,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-27 21:49:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-27 21:49:34,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509589757] [2020-08-27 21:49:34,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:34,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-27 21:49:34,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083457945] [2020-08-27 21:49:34,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-27 21:49:34,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:34,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-27 21:49:34,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:49:34,700 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-08-27 21:49:34,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:34,804 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-08-27 21:49:34,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-27 21:49:34,805 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-27 21:49:34,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:34,806 INFO L225 Difference]: With dead ends: 38 [2020-08-27 21:49:34,806 INFO L226 Difference]: Without dead ends: 23 [2020-08-27 21:49:34,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:49:34,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-27 21:49:34,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-27 21:49:34,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-27 21:49:34,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-27 21:49:34,816 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-08-27 21:49:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:34,817 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-27 21:49:34,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-27 21:49:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-27 21:49:34,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-27 21:49:34,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:34,820 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:34,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:49:34,820 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:34,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:34,821 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-08-27 21:49:34,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:34,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179653818] [2020-08-27 21:49:34,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-27 21:49:34,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179653818] [2020-08-27 21:49:34,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:34,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-27 21:49:34,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298973799] [2020-08-27 21:49:34,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-27 21:49:34,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:34,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-27 21:49:34,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:49:34,939 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-08-27 21:49:35,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:35,076 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-08-27 21:49:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-27 21:49:35,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-27 21:49:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:35,079 INFO L225 Difference]: With dead ends: 41 [2020-08-27 21:49:35,080 INFO L226 Difference]: Without dead ends: 37 [2020-08-27 21:49:35,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:49:35,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-27 21:49:35,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-08-27 21:49:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-27 21:49:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-08-27 21:49:35,093 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-08-27 21:49:35,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:35,094 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-08-27 21:49:35,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-27 21:49:35,094 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-08-27 21:49:35,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-27 21:49:35,096 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:35,096 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:35,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:49:35,097 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:35,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:35,097 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2020-08-27 21:49:35,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:35,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426716340] [2020-08-27 21:49:35,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-27 21:49:35,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426716340] [2020-08-27 21:49:35,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:35,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-27 21:49:35,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852414213] [2020-08-27 21:49:35,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:49:35,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:35,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:49:35,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:49:35,316 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 8 states. [2020-08-27 21:49:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:35,451 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2020-08-27 21:49:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-27 21:49:35,452 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-27 21:49:35,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:35,454 INFO L225 Difference]: With dead ends: 79 [2020-08-27 21:49:35,454 INFO L226 Difference]: Without dead ends: 48 [2020-08-27 21:49:35,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-08-27 21:49:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-27 21:49:35,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-08-27 21:49:35,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-27 21:49:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-27 21:49:35,468 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 40 [2020-08-27 21:49:35,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:35,469 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-27 21:49:35,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:49:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-27 21:49:35,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-27 21:49:35,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:35,471 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:35,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:49:35,472 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:35,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:35,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 3 times [2020-08-27 21:49:35,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:35,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306708694] [2020-08-27 21:49:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-27 21:49:35,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306708694] [2020-08-27 21:49:35,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:35,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-27 21:49:35,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316890205] [2020-08-27 21:49:35,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-27 21:49:35,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:35,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-27 21:49:35,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:49:35,598 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 7 states. [2020-08-27 21:49:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:35,722 INFO L93 Difference]: Finished difference Result 65 states and 93 transitions. [2020-08-27 21:49:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-27 21:49:35,722 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-08-27 21:49:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:35,725 INFO L225 Difference]: With dead ends: 65 [2020-08-27 21:49:35,725 INFO L226 Difference]: Without dead ends: 61 [2020-08-27 21:49:35,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:49:35,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-27 21:49:35,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-08-27 21:49:35,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-27 21:49:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 84 transitions. [2020-08-27 21:49:35,741 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 84 transitions. Word has length 41 [2020-08-27 21:49:35,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:35,741 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 84 transitions. [2020-08-27 21:49:35,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-27 21:49:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 84 transitions. [2020-08-27 21:49:35,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-27 21:49:35,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:35,745 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:35,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:49:35,746 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:35,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:35,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1986920854, now seen corresponding path program 4 times [2020-08-27 21:49:35,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:35,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2884402] [2020-08-27 21:49:35,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:49:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:35,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 77 proven. 104 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-08-27 21:49:36,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2884402] [2020-08-27 21:49:36,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:36,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-27 21:49:36,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200066772] [2020-08-27 21:49:36,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-27 21:49:36,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:36,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-27 21:49:36,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-27 21:49:36,107 INFO L87 Difference]: Start difference. First operand 58 states and 84 transitions. Second operand 11 states. [2020-08-27 21:49:36,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:36,486 INFO L93 Difference]: Finished difference Result 107 states and 178 transitions. [2020-08-27 21:49:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-27 21:49:36,488 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-08-27 21:49:36,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:36,494 INFO L225 Difference]: With dead ends: 107 [2020-08-27 21:49:36,494 INFO L226 Difference]: Without dead ends: 57 [2020-08-27 21:49:36,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-08-27 21:49:36,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-27 21:49:36,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-27 21:49:36,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-27 21:49:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2020-08-27 21:49:36,521 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 82 [2020-08-27 21:49:36,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:36,521 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2020-08-27 21:49:36,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-27 21:49:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2020-08-27 21:49:36,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-27 21:49:36,531 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:36,531 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:36,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 21:49:36,532 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:36,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:36,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2020-08-27 21:49:36,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:36,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539638145] [2020-08-27 21:49:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:49:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:36,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-27 21:49:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:36,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:37,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:37,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:37,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:37,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:49:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:37,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:37,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 193 proven. 313 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-08-27 21:49:37,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539638145] [2020-08-27 21:49:37,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:37,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-27 21:49:37,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583019964] [2020-08-27 21:49:37,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-27 21:49:37,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:37,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-27 21:49:37,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-27 21:49:37,121 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 13 states. [2020-08-27 21:49:37,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:37,586 INFO L93 Difference]: Finished difference Result 114 states and 179 transitions. [2020-08-27 21:49:37,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-27 21:49:37,587 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 136 [2020-08-27 21:49:37,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:37,589 INFO L225 Difference]: With dead ends: 114 [2020-08-27 21:49:37,589 INFO L226 Difference]: Without dead ends: 73 [2020-08-27 21:49:37,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2020-08-27 21:49:37,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-27 21:49:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2020-08-27 21:49:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-27 21:49:37,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2020-08-27 21:49:37,602 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 136 [2020-08-27 21:49:37,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:37,602 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2020-08-27 21:49:37,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-27 21:49:37,603 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2020-08-27 21:49:37,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-27 21:49:37,604 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:37,605 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:37,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-27 21:49:37,605 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:37,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 6 times [2020-08-27 21:49:37,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:37,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065030877] [2020-08-27 21:49:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:37,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:37,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:37,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:37,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:37,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:37,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:37,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:37,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:49:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-27 21:49:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-08-27 21:49:38,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065030877] [2020-08-27 21:49:38,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:38,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-27 21:49:38,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609051529] [2020-08-27 21:49:38,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-27 21:49:38,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:38,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-27 21:49:38,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-27 21:49:38,110 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand 16 states. [2020-08-27 21:49:38,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:38,344 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2020-08-27 21:49:38,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-27 21:49:38,345 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2020-08-27 21:49:38,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:38,347 INFO L225 Difference]: With dead ends: 76 [2020-08-27 21:49:38,347 INFO L226 Difference]: Without dead ends: 72 [2020-08-27 21:49:38,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-08-27 21:49:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-27 21:49:38,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-08-27 21:49:38,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-27 21:49:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2020-08-27 21:49:38,358 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 109 [2020-08-27 21:49:38,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:38,358 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2020-08-27 21:49:38,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-27 21:49:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2020-08-27 21:49:38,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-27 21:49:38,361 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:38,361 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:38,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-27 21:49:38,361 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:38,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:38,362 INFO L82 PathProgramCache]: Analyzing trace with hash -344605238, now seen corresponding path program 7 times [2020-08-27 21:49:38,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:38,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344124038] [2020-08-27 21:49:38,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-27 21:49:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-27 21:49:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-27 21:49:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-27 21:49:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-27 21:49:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-27 21:49:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 204 proven. 219 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2020-08-27 21:49:38,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344124038] [2020-08-27 21:49:38,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:38,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-27 21:49:38,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278551454] [2020-08-27 21:49:38,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-27 21:49:38,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:38,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-27 21:49:38,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-27 21:49:38,733 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand 11 states. [2020-08-27 21:49:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:39,003 INFO L93 Difference]: Finished difference Result 135 states and 192 transitions. [2020-08-27 21:49:39,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-27 21:49:39,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136 [2020-08-27 21:49:39,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:39,005 INFO L225 Difference]: With dead ends: 135 [2020-08-27 21:49:39,005 INFO L226 Difference]: Without dead ends: 0 [2020-08-27 21:49:39,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-08-27 21:49:39,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-27 21:49:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-27 21:49:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-27 21:49:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-27 21:49:39,008 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2020-08-27 21:49:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:39,009 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-27 21:49:39,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-27 21:49:39,009 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-27 21:49:39,009 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-27 21:49:39,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-27 21:49:39,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-27 21:49:39,438 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2020-08-27 21:49:39,496 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-27 21:49:39,496 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-27 21:49:39,496 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-27 21:49:39,496 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-27 21:49:39,496 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-27 21:49:39,496 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-27 21:49:39,496 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2020-08-27 21:49:39,497 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-08-27 21:49:39,497 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-08-27 21:49:39,497 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-27 21:49:39,497 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-08-27 21:49:39,498 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 23 30) no Hoare annotation was computed. [2020-08-27 21:49:39,498 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-08-27 21:49:39,498 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-08-27 21:49:39,498 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 23 30) no Hoare annotation was computed. [2020-08-27 21:49:39,498 INFO L268 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2020-08-27 21:49:39,498 INFO L268 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2020-08-27 21:49:39,499 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (not (<= |fibo_#in~n| 1)) (= fibo_~n |fibo_#in~n|)) [2020-08-27 21:49:39,499 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-08-27 21:49:39,499 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse1 (<= 1 |fibo_#t~ret0|)) (.cse2 (<= |fibo_#t~ret0| 1)) (.cse0 (= fibo_~n |fibo_#in~n|))) (or (and (<= 3 |fibo_#t~ret0|) (<= 5 fibo_~n) (<= |fibo_#t~ret0| 3) .cse0) (and .cse0 (<= 6 |fibo_#in~n|)) (and .cse1 (<= 2 |fibo_#in~n|) .cse2 (<= |fibo_#in~n| 2) .cse0) (and (<= |fibo_#in~n| 4) (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse0 (<= 4 |fibo_#in~n|)) (and .cse1 .cse2 .cse0 (<= 3 |fibo_#in~n|) (<= |fibo_#in~n| 3)))) [2020-08-27 21:49:39,499 INFO L268 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2020-08-27 21:49:39,499 INFO L268 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-08-27 21:49:39,500 INFO L268 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2020-08-27 21:49:39,500 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-08-27 21:49:39,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:49:39 BoogieIcfgContainer [2020-08-27 21:49:39,507 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:49:39,509 INFO L168 Benchmark]: Toolchain (without parser) took 6620.59 ms. Allocated memory was 139.5 MB in the beginning and 315.6 MB in the end (delta: 176.2 MB). Free memory was 101.4 MB in the beginning and 272.4 MB in the end (delta: -171.0 MB). Peak memory consumption was 153.5 MB. Max. memory is 7.1 GB. [2020-08-27 21:49:39,510 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-27 21:49:39,511 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.46 ms. Allocated memory is still 139.5 MB. Free memory was 101.2 MB in the beginning and 91.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-27 21:49:39,512 INFO L168 Benchmark]: Boogie Preprocessor took 32.16 ms. Allocated memory is still 139.5 MB. Free memory was 91.8 MB in the beginning and 90.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-27 21:49:39,513 INFO L168 Benchmark]: RCFGBuilder took 380.09 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 90.5 MB in the beginning and 170.5 MB in the end (delta: -80.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-27 21:49:39,514 INFO L168 Benchmark]: TraceAbstraction took 5818.25 ms. Allocated memory was 202.4 MB in the beginning and 315.6 MB in the end (delta: 113.2 MB). Free memory was 169.8 MB in the beginning and 272.4 MB in the end (delta: -102.5 MB). Peak memory consumption was 159.0 MB. Max. memory is 7.1 GB. [2020-08-27 21:49:39,518 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 381.46 ms. Allocated memory is still 139.5 MB. Free memory was 101.2 MB in the beginning and 91.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.16 ms. Allocated memory is still 139.5 MB. Free memory was 91.8 MB in the beginning and 90.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 380.09 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 90.5 MB in the beginning and 170.5 MB in the end (delta: -80.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5818.25 ms. Allocated memory was 202.4 MB in the beginning and 315.6 MB in the end (delta: 113.2 MB). Free memory was 169.8 MB in the beginning and 272.4 MB in the end (delta: -102.5 MB). Peak memory consumption was 159.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.2s, OverallIterations: 10, TraceHistogramMax: 19, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 218 SDtfs, 262 SDslu, 932 SDs, 0 SdLazy, 1003 SolverSat, 217 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 345 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 25 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 137 PreInvPairs, 171 NumberOfFragments, 89 HoareAnnotationTreeSize, 137 FomulaSimplifications, 126 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 703 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 624 NumberOfCodeBlocks, 624 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 614 ConstructedInterpolants, 0 QuantifiedInterpolants, 134010 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 1993/2854 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...