/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 DAGSIZE --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/loop-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 04:01:26,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 04:01:26,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 04:01:27,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 04:01:27,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 04:01:27,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 04:01:27,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 04:01:27,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 04:01:27,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 04:01:27,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 04:01:27,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 04:01:27,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 04:01:27,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 04:01:27,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 04:01:27,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 04:01:27,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 04:01:27,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 04:01:27,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 04:01:27,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 04:01:27,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 04:01:27,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 04:01:27,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 04:01:27,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 04:01:27,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 04:01:27,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 04:01:27,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 04:01:27,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 04:01:27,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 04:01:27,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 04:01:27,097 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 04:01:27,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 04:01:27,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 04:01:27,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 04:01:27,104 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 04:01:27,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 04:01:27,105 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 04:01:27,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 04:01:27,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 04:01:27,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 04:01:27,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 04:01:27,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 04:01:27,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 04:01:27,109 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 04:01:27,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 04:01:27,110 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 04:01:27,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 04:01:27,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 04:01:27,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 04:01:27,111 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 04:01:27,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 04:01:27,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 04:01:27,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 04:01:27,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 04:01:27,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 04:01:27,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 04:01:27,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 04:01:27,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 04:01:27,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 04:01:27,115 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 04:01:27,480 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 04:01:27,506 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 04:01:27,512 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 04:01:27,514 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 04:01:27,514 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 04:01:27,515 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-07-20 04:01:27,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75def728a/8845822def0446cd9f49cca3f86c0064/FLAGf3f5fbed8 [2020-07-20 04:01:28,149 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 04:01:28,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2020-07-20 04:01:28,159 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75def728a/8845822def0446cd9f49cca3f86c0064/FLAGf3f5fbed8 [2020-07-20 04:01:28,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75def728a/8845822def0446cd9f49cca3f86c0064 [2020-07-20 04:01:28,450 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 04:01:28,454 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 04:01:28,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 04:01:28,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 04:01:28,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 04:01:28,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:01:28" (1/1) ... [2020-07-20 04:01:28,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b0498f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:28, skipping insertion in model container [2020-07-20 04:01:28,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:01:28" (1/1) ... [2020-07-20 04:01:28,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 04:01:28,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 04:01:28,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 04:01:28,704 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 04:01:28,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 04:01:28,738 INFO L208 MainTranslator]: Completed translation [2020-07-20 04:01:28,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:28 WrapperNode [2020-07-20 04:01:28,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 04:01:28,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 04:01:28,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 04:01:28,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 04:01:28,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:28" (1/1) ... [2020-07-20 04:01:28,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:28" (1/1) ... [2020-07-20 04:01:28,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:28" (1/1) ... [2020-07-20 04:01:28,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:28" (1/1) ... [2020-07-20 04:01:28,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:28" (1/1) ... [2020-07-20 04:01:28,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:28" (1/1) ... [2020-07-20 04:01:28,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:28" (1/1) ... [2020-07-20 04:01:28,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 04:01:28,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 04:01:28,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 04:01:28,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 04:01:28,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 04:01:28,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 04:01:28,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 04:01:28,955 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 04:01:28,955 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 04:01:28,955 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 04:01:28,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 04:01:28,956 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 04:01:28,956 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 04:01:28,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 04:01:28,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 04:01:28,956 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 04:01:28,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 04:01:28,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 04:01:29,230 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 04:01:29,230 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 04:01:29,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:01:29 BoogieIcfgContainer [2020-07-20 04:01:29,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 04:01:29,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 04:01:29,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 04:01:29,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 04:01:29,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:01:28" (1/3) ... [2020-07-20 04:01:29,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16672ae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:01:29, skipping insertion in model container [2020-07-20 04:01:29,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:28" (2/3) ... [2020-07-20 04:01:29,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16672ae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:01:29, skipping insertion in model container [2020-07-20 04:01:29,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:01:29" (3/3) ... [2020-07-20 04:01:29,253 INFO L109 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-07-20 04:01:29,273 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 04:01:29,282 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 04:01:29,311 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 04:01:29,348 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 04:01:29,348 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 04:01:29,348 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 04:01:29,348 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 04:01:29,349 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 04:01:29,349 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 04:01:29,349 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 04:01:29,350 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 04:01:29,375 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 04:01:29,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 04:01:29,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:01:29,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:01:29,386 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:01:29,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:01:29,395 INFO L82 PathProgramCache]: Analyzing trace with hash 404168940, now seen corresponding path program 1 times [2020-07-20 04:01:29,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:01:29,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887100336] [2020-07-20 04:01:29,409 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dd1dbf8 [2020-07-20 04:01:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 04:01:29,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887100336] [2020-07-20 04:01:29,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:01:29,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:01:29,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944627508] [2020-07-20 04:01:29,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:01:29,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:01:29,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:01:29,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:01:29,695 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-07-20 04:01:29,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:01:29,880 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2020-07-20 04:01:29,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 04:01:29,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 04:01:29,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:01:29,909 INFO L225 Difference]: With dead ends: 57 [2020-07-20 04:01:29,909 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 04:01:29,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:01:29,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 04:01:29,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 04:01:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 04:01:29,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-20 04:01:29,959 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-07-20 04:01:29,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:01:29,960 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-20 04:01:29,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:01:29,961 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-20 04:01:29,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 04:01:29,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:01:29,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:01:29,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 04:01:29,963 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:01:29,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:01:29,964 INFO L82 PathProgramCache]: Analyzing trace with hash -849304486, now seen corresponding path program 1 times [2020-07-20 04:01:29,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:01:29,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639381314] [2020-07-20 04:01:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dd1dbf8 [2020-07-20 04:01:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 04:01:30,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639381314] [2020-07-20 04:01:30,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:01:30,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 04:01:30,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048221054] [2020-07-20 04:01:30,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 04:01:30,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:01:30,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 04:01:30,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:01:30,062 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-07-20 04:01:30,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:01:30,206 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-07-20 04:01:30,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 04:01:30,206 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-20 04:01:30,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:01:30,208 INFO L225 Difference]: With dead ends: 40 [2020-07-20 04:01:30,208 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 04:01:30,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 04:01:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 04:01:30,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-07-20 04:01:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 04:01:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 04:01:30,220 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2020-07-20 04:01:30,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:01:30,220 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 04:01:30,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 04:01:30,220 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 04:01:30,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 04:01:30,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:01:30,222 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:01:30,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 04:01:30,222 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:01:30,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:01:30,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1573212483, now seen corresponding path program 1 times [2020-07-20 04:01:30,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:01:30,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123134189] [2020-07-20 04:01:30,224 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dd1dbf8 [2020-07-20 04:01:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 04:01:30,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123134189] [2020-07-20 04:01:30,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:01:30,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:01:30,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882415101] [2020-07-20 04:01:30,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:01:30,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:01:30,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:01:30,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:01:30,329 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 5 states. [2020-07-20 04:01:30,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:01:30,400 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-07-20 04:01:30,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 04:01:30,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-20 04:01:30,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:01:30,403 INFO L225 Difference]: With dead ends: 45 [2020-07-20 04:01:30,403 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 04:01:30,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:01:30,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 04:01:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-20 04:01:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 04:01:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-20 04:01:30,417 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 20 [2020-07-20 04:01:30,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:01:30,417 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-20 04:01:30,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:01:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-20 04:01:30,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 04:01:30,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:01:30,419 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] [2020-07-20 04:01:30,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 04:01:30,420 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:01:30,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:01:30,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1604756500, now seen corresponding path program 1 times [2020-07-20 04:01:30,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:01:30,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763151587] [2020-07-20 04:01:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dd1dbf8 [2020-07-20 04:01:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 04:01:30,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763151587] [2020-07-20 04:01:30,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:01:30,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:01:30,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703340348] [2020-07-20 04:01:30,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:01:30,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:01:30,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:01:30,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:01:30,510 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 5 states. [2020-07-20 04:01:30,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:01:30,661 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2020-07-20 04:01:30,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 04:01:30,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-20 04:01:30,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:01:30,663 INFO L225 Difference]: With dead ends: 97 [2020-07-20 04:01:30,664 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 04:01:30,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 04:01:30,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 04:01:30,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-07-20 04:01:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 04:01:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-07-20 04:01:30,678 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2020-07-20 04:01:30,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:01:30,679 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-07-20 04:01:30,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:01:30,679 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-07-20 04:01:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 04:01:30,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:01:30,681 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-20 04:01:30,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 04:01:30,681 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:01:30,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:01:30,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1598241856, now seen corresponding path program 1 times [2020-07-20 04:01:30,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:01:30,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248033023] [2020-07-20 04:01:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dd1dbf8 [2020-07-20 04:01:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 04:01:30,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248033023] [2020-07-20 04:01:30,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501143324] [2020-07-20 04:01:30,746 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f46c7e3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:01:30,797 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f46c7e3 issued 2 check-sat command(s) [2020-07-20 04:01:30,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:01:30,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 04:01:30,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:01:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 04:01:30,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 04:01:30,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-07-20 04:01:30,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250565825] [2020-07-20 04:01:30,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 04:01:30,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:01:30,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 04:01:30,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:01:30,839 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 6 states. [2020-07-20 04:01:30,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:01:30,918 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-07-20 04:01:30,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 04:01:30,919 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-07-20 04:01:30,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:01:30,920 INFO L225 Difference]: With dead ends: 80 [2020-07-20 04:01:30,920 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 04:01:30,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 04:01:30,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 04:01:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-07-20 04:01:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 04:01:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-07-20 04:01:30,932 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 31 [2020-07-20 04:01:30,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:01:30,933 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-07-20 04:01:30,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 04:01:30,933 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-07-20 04:01:30,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 04:01:30,934 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:01:30,934 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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] [2020-07-20 04:01:31,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:01:31,149 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:01:31,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:01:31,150 INFO L82 PathProgramCache]: Analyzing trace with hash 2099424040, now seen corresponding path program 1 times [2020-07-20 04:01:31,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:01:31,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015555782] [2020-07-20 04:01:31,151 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dd1dbf8 [2020-07-20 04:01:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 04:01:31,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015555782] [2020-07-20 04:01:31,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760563147] [2020-07-20 04:01:31,235 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58268c79 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:01:31,277 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58268c79 issued 2 check-sat command(s) [2020-07-20 04:01:31,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:01:31,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 04:01:31,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:01:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 04:01:31,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 04:01:31,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 04:01:31,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857169521] [2020-07-20 04:01:31,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 04:01:31,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:01:31,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 04:01:31,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-07-20 04:01:31,435 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 14 states. [2020-07-20 04:01:32,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:01:32,158 INFO L93 Difference]: Finished difference Result 167 states and 219 transitions. [2020-07-20 04:01:32,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 04:01:32,158 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-07-20 04:01:32,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:01:32,162 INFO L225 Difference]: With dead ends: 167 [2020-07-20 04:01:32,163 INFO L226 Difference]: Without dead ends: 105 [2020-07-20 04:01:32,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2020-07-20 04:01:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-20 04:01:32,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 57. [2020-07-20 04:01:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 04:01:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-07-20 04:01:32,199 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 34 [2020-07-20 04:01:32,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:01:32,200 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-07-20 04:01:32,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 04:01:32,201 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-07-20 04:01:32,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 04:01:32,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:01:32,206 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:01:32,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:01:32,408 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:01:32,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:01:32,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1702845076, now seen corresponding path program 2 times [2020-07-20 04:01:32,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:01:32,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768687932] [2020-07-20 04:01:32,410 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@dd1dbf8 [2020-07-20 04:01:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:32,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 04:01:32,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768687932] [2020-07-20 04:01:32,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:01:32,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 04:01:32,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33298383] [2020-07-20 04:01:32,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 04:01:32,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:01:32,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 04:01:32,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:01:32,509 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 6 states. [2020-07-20 04:01:32,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:01:32,570 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2020-07-20 04:01:32,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 04:01:32,570 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-07-20 04:01:32,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:01:32,571 INFO L225 Difference]: With dead ends: 57 [2020-07-20 04:01:32,571 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 04:01:32,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 04:01:32,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 04:01:32,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 04:01:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 04:01:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 04:01:32,573 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2020-07-20 04:01:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:01:32,574 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 04:01:32,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 04:01:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 04:01:32,574 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 04:01:32,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 04:01:32,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 04:01:33,042 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 04:01:33,042 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 04:01:33,042 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 04:01:33,043 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 04:01:33,043 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 04:01:33,043 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 04:01:33,043 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 04:01:33,044 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 04:01:33,044 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 04:01:33,044 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 04:01:33,044 INFO L268 CegarLoopResult]: For program point L31(lines 23 33) no Hoare annotation was computed. [2020-07-20 04:01:33,044 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 37) no Hoare annotation was computed. [2020-07-20 04:01:33,044 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 33) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (let ((.cse1 (<= main_~n~0 main_~k~0)) (.cse2 (<= .cse0 main_~j~0))) (or (and (<= main_~k~0 (+ .cse0 1)) (<= main_~k~0 main_~j~0) .cse1 .cse2) (and (<= main_~k~0 main_~n~0) .cse1 .cse2) (and (<= (+ (div (+ (* main_~n~0 (- 1)) 1) (- 2)) 1) (div main_~j~0 2)) (<= main_~j~0 .cse0) .cse1 .cse2)))) [2020-07-20 04:01:33,045 INFO L268 CegarLoopResult]: For program point L24(lines 24 32) no Hoare annotation was computed. [2020-07-20 04:01:33,045 INFO L264 CegarLoopResult]: At program point L25-2(lines 25 27) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= (+ main_~j~0 1) main_~n~0) (<= .cse0 main_~k~0) (<= main_~k~0 main_~n~0) (<= .cse0 main_~j~0))) [2020-07-20 04:01:33,045 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-20 04:01:33,045 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 37) no Hoare annotation was computed. [2020-07-20 04:01:33,045 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0) (<= (* 2 main_~i~0) main_~j~0)) [2020-07-20 04:01:33,045 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 37) the Hoare annotation is: true [2020-07-20 04:01:33,046 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0) (<= (* 2 main_~i~0) main_~j~0)) [2020-07-20 04:01:33,046 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= (+ main_~j~0 1) main_~n~0) (<= (+ main_~k~0 1) main_~n~0) (<= .cse0 main_~k~0) (<= .cse0 main_~j~0))) [2020-07-20 04:01:33,046 INFO L268 CegarLoopResult]: For program point L26-1(lines 25 27) no Hoare annotation was computed. [2020-07-20 04:01:33,046 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 34) no Hoare annotation was computed. [2020-07-20 04:01:33,046 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 34) the Hoare annotation is: (let ((.cse2 (* 2 main_~i~0)) (.cse0 (<= main_~n~0 main_~k~0)) (.cse1 (<= main_~n~0 main_~j~0))) (or (and (or (and (<= main_~i~0 0) .cse0) (and .cse0 .cse1)) (<= main_~k~0 main_~n~0)) (and (<= main_~k~0 .cse2) .cse0 .cse1) (and (<= (+ (div (+ (* main_~n~0 (- 1)) 1) (- 2)) 1) main_~i~0) (<= main_~j~0 .cse2) .cse0 .cse1))) [2020-07-20 04:01:33,047 INFO L268 CegarLoopResult]: For program point L18(lines 18 21) no Hoare annotation was computed. [2020-07-20 04:01:33,047 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 21) no Hoare annotation was computed. [2020-07-20 04:01:33,047 INFO L271 CegarLoopResult]: At program point L35(lines 13 37) the Hoare annotation is: true [2020-07-20 04:01:33,047 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 04:01:33,047 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 04:01:33,047 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 04:01:33,047 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 04:01:33,048 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 04:01:33,048 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 04:01:33,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 04:01:33 BoogieIcfgContainer [2020-07-20 04:01:33,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 04:01:33,072 INFO L168 Benchmark]: Toolchain (without parser) took 4618.82 ms. Allocated memory was 136.8 MB in the beginning and 250.6 MB in the end (delta: 113.8 MB). Free memory was 102.0 MB in the beginning and 119.9 MB in the end (delta: -17.9 MB). Peak memory consumption was 95.8 MB. Max. memory is 7.1 GB. [2020-07-20 04:01:33,073 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 04:01:33,074 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.07 ms. Allocated memory is still 136.8 MB. Free memory was 101.8 MB in the beginning and 91.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-20 04:01:33,075 INFO L168 Benchmark]: Boogie Preprocessor took 125.23 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 179.4 MB in the end (delta: -87.8 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2020-07-20 04:01:33,076 INFO L168 Benchmark]: RCFGBuilder took 373.79 ms. Allocated memory is still 199.8 MB. Free memory was 179.4 MB in the beginning and 163.6 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. [2020-07-20 04:01:33,077 INFO L168 Benchmark]: TraceAbstraction took 3827.32 ms. Allocated memory was 199.8 MB in the beginning and 250.6 MB in the end (delta: 50.9 MB). Free memory was 163.6 MB in the beginning and 119.9 MB in the end (delta: 43.7 MB). Peak memory consumption was 94.6 MB. Max. memory is 7.1 GB. [2020-07-20 04:01:33,081 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.07 ms. Allocated memory is still 136.8 MB. Free memory was 101.8 MB in the beginning and 91.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.23 ms. Allocated memory was 136.8 MB in the beginning and 199.8 MB in the end (delta: 62.9 MB). Free memory was 91.7 MB in the beginning and 179.4 MB in the end (delta: -87.8 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 373.79 ms. Allocated memory is still 199.8 MB. Free memory was 179.4 MB in the beginning and 163.6 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3827.32 ms. Allocated memory was 199.8 MB in the beginning and 250.6 MB in the end (delta: 50.9 MB). Free memory was 163.6 MB in the beginning and 119.9 MB in the end (delta: 43.7 MB). Peak memory consumption was 94.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((j + 1 <= n && 2 * i <= k) && k <= n) && 2 * i <= j - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((i <= 0 && n <= k) || (n <= k && n <= j)) && k <= n) || ((k <= 2 * i && n <= k) && n <= j)) || ((((n * -1 + 1) / -2 + 1 <= i && j <= 2 * i) && n <= k) && n <= j) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((k <= 2 * i + 1 && k <= j) && n <= k) && 2 * i <= j) || ((k <= n && n <= k) && 2 * i <= j)) || ((((n * -1 + 1) / -2 + 1 <= j / 2 && j <= 2 * i) && n <= k) && 2 * i <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.2s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 191 SDtfs, 134 SDslu, 523 SDs, 0 SdLazy, 532 SolverSat, 98 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred 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, 74 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 35 PreInvPairs, 68 NumberOfFragments, 194 HoareAnnotationTreeSize, 35 FomulaSimplifications, 3095 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 525 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 243 NumberOfCodeBlocks, 212 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 234 ConstructedInterpolants, 0 QuantifiedInterpolants, 12966 SizeOfPredicates, 8 NumberOfNonLiveVariables, 97 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 72/81 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...