/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:17:13,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:17:13,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:17:13,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:17:13,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:17:13,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:17:13,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:17:13,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:17:13,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:17:13,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:17:13,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:17:13,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:17:13,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:17:13,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:17:13,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:17:13,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:17:13,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:17:13,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:17:13,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:17:13,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:17:13,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:17:13,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:17:13,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:17:13,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:17:13,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:17:13,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:17:13,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:17:13,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:17:13,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-19 23:17:13,535 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:17:13,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:17:13,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:17:13,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:17:13,537 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:17:13,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:17:13,538 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:17:13,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:17:13,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:17:13,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:17:13,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:17:13,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:17:13,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:17:13,539 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:17:13,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:17:13,539 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:17:13,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:17:13,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:17:13,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:17:13,540 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:17:13,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:17:13,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:17:13,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:17:13,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:17:13,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:17:13,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:17:13,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:17:13,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:17:13,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:17:13,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:17:13,854 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:17:13,872 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:17:13,876 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:17:13,877 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:17:13,877 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:17:13,878 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-07-19 23:17:13,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed150ce77/17f5c7be7f724623b747a3d0d22bb32c/FLAG15116126f [2020-07-19 23:17:14,374 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:17:14,375 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-07-19 23:17:14,379 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed150ce77/17f5c7be7f724623b747a3d0d22bb32c/FLAG15116126f [2020-07-19 23:17:14,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed150ce77/17f5c7be7f724623b747a3d0d22bb32c [2020-07-19 23:17:14,786 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:17:14,789 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:17:14,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:17:14,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:17:14,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:17:14,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:17:14" (1/1) ... [2020-07-19 23:17:14,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4182180f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:14, skipping insertion in model container [2020-07-19 23:17:14,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:17:14" (1/1) ... [2020-07-19 23:17:14,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:17:14,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:17:15,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:17:15,039 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:17:15,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:17:15,077 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:17:15,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:15 WrapperNode [2020-07-19 23:17:15,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:17:15,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:17:15,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:17:15,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:17:15,095 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:15" (1/1) ... [2020-07-19 23:17:15,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:15" (1/1) ... [2020-07-19 23:17:15,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:15" (1/1) ... [2020-07-19 23:17:15,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:15" (1/1) ... [2020-07-19 23:17:15,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:15" (1/1) ... [2020-07-19 23:17:15,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:15" (1/1) ... [2020-07-19 23:17:15,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:15" (1/1) ... [2020-07-19 23:17:15,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:17:15,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:17:15,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:17:15,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:17:15,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:17:15,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:17:15,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:17:15,312 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-19 23:17:15,312 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:17:15,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:17:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:17:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-19 23:17:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:17:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:17:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:17:15,580 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:17:15,581 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 23:17:15,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:17:15 BoogieIcfgContainer [2020-07-19 23:17:15,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:17:15,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:17:15,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:17:15,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:17:15,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:17:14" (1/3) ... [2020-07-19 23:17:15,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4265fba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:17:15, skipping insertion in model container [2020-07-19 23:17:15,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:15" (2/3) ... [2020-07-19 23:17:15,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4265fba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:17:15, skipping insertion in model container [2020-07-19 23:17:15,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:17:15" (3/3) ... [2020-07-19 23:17:15,611 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2020-07-19 23:17:15,638 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:17:15,655 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:17:15,680 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:17:15,708 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:17:15,708 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:17:15,710 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:17:15,710 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:17:15,711 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:17:15,711 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:17:15,711 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:17:15,711 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:17:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-19 23:17:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 23:17:15,737 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:15,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:15,739 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:15,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:15,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1250208381, now seen corresponding path program 1 times [2020-07-19 23:17:15,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:15,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458304464] [2020-07-19 23:17:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 23:17:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:17:15,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458304464] [2020-07-19 23:17:15,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:17:15,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:17:15,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087625045] [2020-07-19 23:17:15,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:17:15,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:15,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:17:15,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:17:15,989 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-19 23:17:16,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:16,043 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-19 23:17:16,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:17:16,045 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-19 23:17:16,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:16,057 INFO L225 Difference]: With dead ends: 33 [2020-07-19 23:17:16,058 INFO L226 Difference]: Without dead ends: 19 [2020-07-19 23:17:16,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:17:16,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-19 23:17:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-19 23:17:16,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-19 23:17:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-07-19 23:17:16,112 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-07-19 23:17:16,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:16,113 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-07-19 23:17:16,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:17:16,113 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-07-19 23:17:16,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 23:17:16,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:16,116 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:16,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:17:16,117 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:16,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1951994857, now seen corresponding path program 1 times [2020-07-19 23:17:16,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:16,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856493393] [2020-07-19 23:17:16,119 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 23:17:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:17:16,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856493393] [2020-07-19 23:17:16,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:17:16,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-19 23:17:16,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696982352] [2020-07-19 23:17:16,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:17:16,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:16,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:17:16,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:17:16,389 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2020-07-19 23:17:16,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:16,418 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-19 23:17:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:17:16,418 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-19 23:17:16,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:16,420 INFO L225 Difference]: With dead ends: 31 [2020-07-19 23:17:16,420 INFO L226 Difference]: Without dead ends: 23 [2020-07-19 23:17:16,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:17:16,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-19 23:17:16,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-19 23:17:16,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 23:17:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-19 23:17:16,429 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2020-07-19 23:17:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:16,429 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-19 23:17:16,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:17:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-19 23:17:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 23:17:16,431 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:16,431 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:16,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:17:16,432 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:16,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:16,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1923365706, now seen corresponding path program 1 times [2020-07-19 23:17:16,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:16,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036058525] [2020-07-19 23:17:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 23:17:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:17:16,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036058525] [2020-07-19 23:17:16,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159843365] [2020-07-19 23:17:16,576 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@12759aaf No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:16,625 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@12759aaf issued 4 check-sat command(s) [2020-07-19 23:17:16,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:16,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 23:17:16,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:17:16,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:16,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-19 23:17:16,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109019961] [2020-07-19 23:17:16,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:17:16,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:16,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:17:16,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:17:16,701 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 10 states. [2020-07-19 23:17:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:16,754 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-07-19 23:17:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:17:16,754 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-07-19 23:17:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:16,756 INFO L225 Difference]: With dead ends: 27 [2020-07-19 23:17:16,756 INFO L226 Difference]: Without dead ends: 23 [2020-07-19 23:17:16,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:17:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-19 23:17:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-19 23:17:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-19 23:17:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-19 23:17:16,763 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-07-19 23:17:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:16,764 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-19 23:17:16,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:17:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-19 23:17:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-19 23:17:16,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:16,766 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:16,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 23:17:16,981 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:16,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:16,982 INFO L82 PathProgramCache]: Analyzing trace with hash 376843494, now seen corresponding path program 1 times [2020-07-19 23:17:16,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:16,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672844699] [2020-07-19 23:17:16,983 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 23:17:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 23:17:17,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672844699] [2020-07-19 23:17:17,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996538037] [2020-07-19 23:17:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f64d1bd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:17,274 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f64d1bd issued 4 check-sat command(s) [2020-07-19 23:17:17,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:17,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 23:17:17,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 23:17:17,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:17,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-19 23:17:17,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794735075] [2020-07-19 23:17:17,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:17:17,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:17,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:17:17,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:17:17,314 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2020-07-19 23:17:17,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:17,349 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-07-19 23:17:17,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:17:17,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-19 23:17:17,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:17,351 INFO L225 Difference]: With dead ends: 35 [2020-07-19 23:17:17,351 INFO L226 Difference]: Without dead ends: 27 [2020-07-19 23:17:17,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:17:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-19 23:17:17,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-19 23:17:17,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-19 23:17:17,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-19 23:17:17,358 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 27 [2020-07-19 23:17:17,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:17,358 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-19 23:17:17,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:17:17,359 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-19 23:17:17,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-19 23:17:17,360 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:17,360 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:17,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:17:17,576 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:17,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:17,577 INFO L82 PathProgramCache]: Analyzing trace with hash 405472645, now seen corresponding path program 2 times [2020-07-19 23:17:17,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:17,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475598829] [2020-07-19 23:17:17,578 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 23:17:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:17:17,614 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:17:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:17:17,643 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:17:17,658 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-19 23:17:17,658 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 23:17:17,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-19 23:17:17,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:17:17 BoogieIcfgContainer [2020-07-19 23:17:17,684 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:17:17,687 INFO L168 Benchmark]: Toolchain (without parser) took 2898.84 ms. Allocated memory was 144.2 MB in the beginning and 234.4 MB in the end (delta: 90.2 MB). Free memory was 101.7 MB in the beginning and 177.9 MB in the end (delta: -76.2 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-19 23:17:17,688 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 144.2 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-19 23:17:17,689 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.84 ms. Allocated memory is still 144.2 MB. Free memory was 101.3 MB in the beginning and 92.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-19 23:17:17,690 INFO L168 Benchmark]: Boogie Preprocessor took 38.32 ms. Allocated memory is still 144.2 MB. Free memory was 92.2 MB in the beginning and 90.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:17:17,691 INFO L168 Benchmark]: RCFGBuilder took 474.91 ms. Allocated memory was 144.2 MB in the beginning and 203.4 MB in the end (delta: 59.2 MB). Free memory was 90.6 MB in the beginning and 170.6 MB in the end (delta: -79.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:17:17,692 INFO L168 Benchmark]: TraceAbstraction took 2089.75 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 170.6 MB in the beginning and 177.9 MB in the end (delta: -7.3 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-07-19 23:17:17,696 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 144.2 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.84 ms. Allocated memory is still 144.2 MB. Free memory was 101.3 MB in the beginning and 92.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.32 ms. Allocated memory is still 144.2 MB. Free memory was 92.2 MB in the beginning and 90.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 474.91 ms. Allocated memory was 144.2 MB in the beginning and 203.4 MB in the end (delta: 59.2 MB). Free memory was 90.6 MB in the beginning and 170.6 MB in the end (delta: -79.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2089.75 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 170.6 MB in the beginning and 177.9 MB in the end (delta: -7.3 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = __VERIFIER_nondet_int(); [L13] CALL, EXPR id(input) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=1, id((unsigned int)x-1)=0, x=1] [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L6] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=2, id((unsigned int)x-1)=1, x=2] [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L13] RET, EXPR id(input) VAL [id(input)=2, input=2] [L13] int result = id(input); [L14] COND TRUE result == 2 VAL [input=2, result=2] [L15] __VERIFIER_error() VAL [input=2, result=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 12 SDslu, 314 SDs, 0 SdLazy, 70 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 154 NumberOfCodeBlocks, 154 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 121 ConstructedInterpolants, 0 QuantifiedInterpolants, 4855 SizeOfPredicates, 4 NumberOfNonLiveVariables, 119 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 30/42 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...