/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_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:18:32,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:18:32,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:18:32,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:18:32,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:18:32,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:18:32,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:18:32,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:18:32,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:18:32,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:18:32,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:18:32,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:18:32,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:18:32,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:18:32,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:18:32,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:18:32,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:18:32,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:18:32,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:18:32,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:18:32,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:18:32,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:18:32,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:18:32,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:18:32,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:18:32,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:18:32,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:18:32,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:18:32,534 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 [2020-09-21 10:18:32,568 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:18:32,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:18:32,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:18:32,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:18:32,573 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:18:32,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:18:32,574 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:18:32,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:18:32,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:18:32,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:18:32,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:18:32,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:18:32,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:18:32,576 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:18:32,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:18:32,577 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:18:32,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:18:32,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:18:32,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:18:32,578 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:18:32,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:18:32,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:18:32,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:18:32,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:18:32,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:18:32,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:18:32,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:18:32,581 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:18:32,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:18:32,582 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 [2020-09-21 10:18:33,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:18:33,109 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:18:33,114 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:18:33,116 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:18:33,116 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:18:33,118 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-09-21 10:18:33,200 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74716af8a/ad50caf1aa0c4f21a420651f900ba9c4/FLAG624ece143 [2020-09-21 10:18:33,749 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:18:33,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-09-21 10:18:33,759 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74716af8a/ad50caf1aa0c4f21a420651f900ba9c4/FLAG624ece143 [2020-09-21 10:18:34,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74716af8a/ad50caf1aa0c4f21a420651f900ba9c4 [2020-09-21 10:18:34,113 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:18:34,120 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:18:34,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:18:34,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:18:34,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:18:34,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:18:34" (1/1) ... [2020-09-21 10:18:34,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@265f99a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:18:34, skipping insertion in model container [2020-09-21 10:18:34,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:18:34" (1/1) ... [2020-09-21 10:18:34,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:18:34,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:18:34,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:18:34,440 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:18:34,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:18:34,501 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:18:34,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:18:34 WrapperNode [2020-09-21 10:18:34,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:18:34,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:18:34,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:18:34,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:18:34,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:18:34" (1/1) ... [2020-09-21 10:18:34,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:18:34" (1/1) ... [2020-09-21 10:18:34,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:18:34" (1/1) ... [2020-09-21 10:18:34,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:18:34" (1/1) ... [2020-09-21 10:18:34,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:18:34" (1/1) ... [2020-09-21 10:18:34,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:18:34" (1/1) ... [2020-09-21 10:18:34,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:18:34" (1/1) ... [2020-09-21 10:18:34,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:18:34,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:18:34,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:18:34,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:18:34,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:18:34" (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 [2020-09-21 10:18:34,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:18:34,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:18:34,728 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-21 10:18:34,728 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-21 10:18:34,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:18:34,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:18:34,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:18:34,730 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-21 10:18:34,731 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-21 10:18:34,731 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:18:34,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:18:34,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:18:35,039 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:18:35,039 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:18:35,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:18:35 BoogieIcfgContainer [2020-09-21 10:18:35,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:18:35,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:18:35,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:18:35,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:18:35,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:18:34" (1/3) ... [2020-09-21 10:18:35,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6166294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:18:35, skipping insertion in model container [2020-09-21 10:18:35,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:18:34" (2/3) ... [2020-09-21 10:18:35,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6166294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:18:35, skipping insertion in model container [2020-09-21 10:18:35,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:18:35" (3/3) ... [2020-09-21 10:18:35,058 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-09-21 10:18:35,073 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:18:35,085 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:18:35,111 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:18:35,159 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:18:35,159 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:18:35,160 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:18:35,160 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:18:35,160 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:18:35,160 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:18:35,160 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:18:35,160 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:18:35,186 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-21 10:18:35,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:18:35,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:35,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:35,197 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:35,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:35,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-09-21 10:18:35,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:35,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561304754] [2020-09-21 10:18:35,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:35,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:35,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:18:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:18:35,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561304754] [2020-09-21 10:18:35,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:18:35,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:18:35,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402781900] [2020-09-21 10:18:35,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:18:35,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:35,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:18:35,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:18:35,542 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-09-21 10:18:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:35,673 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-09-21 10:18:35,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:18:35,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 10:18:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:35,690 INFO L225 Difference]: With dead ends: 44 [2020-09-21 10:18:35,690 INFO L226 Difference]: Without dead ends: 30 [2020-09-21 10:18:35,695 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 [2020-09-21 10:18:35,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-21 10:18:35,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-21 10:18:35,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 10:18:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-09-21 10:18:35,757 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-09-21 10:18:35,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:35,758 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-09-21 10:18:35,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:18:35,758 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-09-21 10:18:35,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 10:18:35,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:35,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:35,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:18:35,761 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:35,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:35,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-09-21 10:18:35,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:35,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880777089] [2020-09-21 10:18:35,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:35,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:35,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:18:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:18:35,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880777089] [2020-09-21 10:18:35,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:18:35,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:18:35,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445725476] [2020-09-21 10:18:35,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:18:35,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:35,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:18:35,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:18:35,836 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-09-21 10:18:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:35,944 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-09-21 10:18:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:18:35,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-21 10:18:35,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:35,948 INFO L225 Difference]: With dead ends: 36 [2020-09-21 10:18:35,948 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 10:18:35,951 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 [2020-09-21 10:18:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 10:18:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-09-21 10:18:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 10:18:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-09-21 10:18:35,972 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-09-21 10:18:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:35,973 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-09-21 10:18:35,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:18:35,975 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-09-21 10:18:35,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 10:18:35,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:35,980 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:35,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:18:35,982 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:35,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:35,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-09-21 10:18:35,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:35,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491549050] [2020-09-21 10:18:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:36,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:36,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:18:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:36,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:36,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:18:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:18:36,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491549050] [2020-09-21 10:18:36,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:36,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:18:36,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647755364] [2020-09-21 10:18:36,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:18:36,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:36,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:18:36,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:18:36,135 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-09-21 10:18:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:36,232 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-09-21 10:18:36,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:18:36,234 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-09-21 10:18:36,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:36,236 INFO L225 Difference]: With dead ends: 58 [2020-09-21 10:18:36,236 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 10:18:36,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:18:36,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 10:18:36,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-21 10:18:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 10:18:36,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-09-21 10:18:36,249 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-09-21 10:18:36,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:36,250 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-09-21 10:18:36,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:18:36,250 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-09-21 10:18:36,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 10:18:36,252 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:36,253 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:36,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:18:36,254 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:36,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:36,255 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-09-21 10:18:36,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:36,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691778893] [2020-09-21 10:18:36,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:36,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:36,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:18:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:36,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:36,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:18:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:18:36,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691778893] [2020-09-21 10:18:36,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:36,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:18:36,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396255209] [2020-09-21 10:18:36,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:18:36,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:36,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:18:36,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:18:36,572 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states. [2020-09-21 10:18:36,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:36,679 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-09-21 10:18:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:18:36,679 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-09-21 10:18:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:36,682 INFO L225 Difference]: With dead ends: 46 [2020-09-21 10:18:36,682 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 10:18:36,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:18:36,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 10:18:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-09-21 10:18:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 10:18:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-09-21 10:18:36,694 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2020-09-21 10:18:36,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:36,695 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-09-21 10:18:36,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:18:36,695 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-09-21 10:18:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 10:18:36,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:36,697 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:36,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:18:36,698 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:36,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:36,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1725129826, now seen corresponding path program 1 times [2020-09-21 10:18:36,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:36,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090153850] [2020-09-21 10:18:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:36,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:36,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:18:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:36,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:36,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:18:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:18:36,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090153850] [2020-09-21 10:18:36,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:36,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:18:36,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870525218] [2020-09-21 10:18:36,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:18:36,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:36,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:18:36,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:18:36,815 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 7 states. [2020-09-21 10:18:36,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:36,935 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2020-09-21 10:18:36,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:18:36,936 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-09-21 10:18:36,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:36,938 INFO L225 Difference]: With dead ends: 71 [2020-09-21 10:18:36,938 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 10:18:36,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:18:36,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 10:18:36,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-09-21 10:18:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 10:18:36,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-09-21 10:18:36,949 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 28 [2020-09-21 10:18:36,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:36,949 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-09-21 10:18:36,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:18:36,949 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-09-21 10:18:36,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 10:18:36,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:36,953 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:36,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:18:36,953 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:36,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:36,954 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-09-21 10:18:36,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:36,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483947470] [2020-09-21 10:18:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:37,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:37,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:18:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:37,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:37,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:37,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 10:18:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:37,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:18:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-21 10:18:37,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483947470] [2020-09-21 10:18:37,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:37,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:18:37,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169046044] [2020-09-21 10:18:37,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:18:37,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:37,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:18:37,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:18:37,095 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 7 states. [2020-09-21 10:18:37,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:37,174 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2020-09-21 10:18:37,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:18:37,175 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-09-21 10:18:37,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:37,177 INFO L225 Difference]: With dead ends: 74 [2020-09-21 10:18:37,177 INFO L226 Difference]: Without dead ends: 41 [2020-09-21 10:18:37,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:18:37,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-21 10:18:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-09-21 10:18:37,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 10:18:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-09-21 10:18:37,187 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 39 [2020-09-21 10:18:37,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:37,188 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-09-21 10:18:37,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:18:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-09-21 10:18:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 10:18:37,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:37,190 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:18:37,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:18:37,191 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:37,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:37,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-09-21 10:18:37,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:37,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422336687] [2020-09-21 10:18:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:37,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:37,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:18:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:37,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:37,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-21 10:18:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:37,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 10:18:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:37,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 10:18:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-21 10:18:37,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422336687] [2020-09-21 10:18:37,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:37,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:18:37,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870024087] [2020-09-21 10:18:37,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:18:37,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:37,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:18:37,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:18:37,332 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 8 states. [2020-09-21 10:18:37,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:37,458 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-09-21 10:18:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:18:37,459 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-09-21 10:18:37,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:37,460 INFO L225 Difference]: With dead ends: 41 [2020-09-21 10:18:37,460 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:18:37,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:18:37,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:18:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:18:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:18:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:18:37,462 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2020-09-21 10:18:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:37,463 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:18:37,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:18:37,463 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:18:37,463 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:18:37,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:18:37,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:18:37,632 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 10:18:37,632 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:18:37,632 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:18:37,632 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 10:18:37,633 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 10:18:37,633 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:18:37,633 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-09-21 10:18:37,633 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-09-21 10:18:37,633 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-09-21 10:18:37,634 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-09-21 10:18:37,634 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-09-21 10:18:37,634 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-09-21 10:18:37,634 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 2 main_~x~0) (<= main_~x~0 2)) [2020-09-21 10:18:37,634 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-09-21 10:18:37,635 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-09-21 10:18:37,635 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-09-21 10:18:37,636 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-09-21 10:18:37,636 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-09-21 10:18:37,636 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-09-21 10:18:37,637 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-09-21 10:18:37,637 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-09-21 10:18:37,637 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-09-21 10:18:37,637 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-09-21 10:18:37,637 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-09-21 10:18:37,638 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-09-21 10:18:37,638 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-09-21 10:18:37,638 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-09-21 10:18:37,638 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 |fibo1_#in~n|)) (and (<= |fibo1_#t~ret0| 1) (< 1 fibo1_~n) (<= 1 |fibo1_#t~ret0|) .cse0))) [2020-09-21 10:18:37,639 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-09-21 10:18:37,643 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-09-21 10:18:37,643 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-09-21 10:18:37,643 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-09-21 10:18:37,644 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-09-21 10:18:37,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:18:37 BoogieIcfgContainer [2020-09-21 10:18:37,658 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:18:37,663 INFO L168 Benchmark]: Toolchain (without parser) took 3545.06 ms. Allocated memory was 140.0 MB in the beginning and 236.5 MB in the end (delta: 96.5 MB). Free memory was 103.2 MB in the beginning and 84.3 MB in the end (delta: 18.9 MB). Peak memory consumption was 115.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:18:37,668 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 10:18:37,669 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.87 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 93.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:18:37,672 INFO L168 Benchmark]: Boogie Preprocessor took 132.48 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.0 MB in the beginning and 181.1 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-21 10:18:37,673 INFO L168 Benchmark]: RCFGBuilder took 409.11 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 167.9 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-09-21 10:18:37,674 INFO L168 Benchmark]: TraceAbstraction took 2610.38 ms. Allocated memory was 202.4 MB in the beginning and 236.5 MB in the end (delta: 34.1 MB). Free memory was 167.2 MB in the beginning and 84.3 MB in the end (delta: 82.9 MB). Peak memory consumption was 117.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:18:37,685 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 381.87 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 93.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.48 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.0 MB in the beginning and 181.1 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 409.11 ms. Allocated memory is still 202.4 MB. Free memory was 181.1 MB in the beginning and 167.9 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2610.38 ms. Allocated memory was 202.4 MB in the beginning and 236.5 MB in the end (delta: 34.1 MB). Free memory was 167.2 MB in the beginning and 84.3 MB in the end (delta: 82.9 MB). Peak memory consumption was 117.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 212 SDtfs, 96 SDslu, 767 SDs, 0 SdLazy, 354 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=6, 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, 7 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 65 PreInvPairs, 73 NumberOfFragments, 57 HoareAnnotationTreeSize, 65 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 187 NumberOfCodeBlocks, 187 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 10186 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 27/46 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...