/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:49:18,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:49:18,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:49:18,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:49:18,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:49:18,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:49:18,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:49:18,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:49:18,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:49:18,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:49:18,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:49:18,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:49:18,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:49:18,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:49:18,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:49:18,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:49:18,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:49:18,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:49:18,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:49:18,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:49:18,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:49:18,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:49:18,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:49:18,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:49:18,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:49:18,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:49:18,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:49:18,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:49:18,369 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 11:49:18,383 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:49:18,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:49:18,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:49:18,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:49:18,385 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:49:18,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:49:18,385 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:49:18,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:49:18,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:49:18,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:49:18,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:49:18,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:49:18,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:49:18,387 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:49:18,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:49:18,387 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:49:18,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:49:18,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:49:18,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:49:18,388 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:49:18,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:49:18,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:49:18,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:49:18,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:49:18,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:49:18,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:49:18,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:18,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:49:18,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:49:18,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:49:18,668 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:49:18,681 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:49:18,685 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:49:18,686 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:49:18,687 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:49:18,687 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-07-20 11:49:18,766 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3b9c1a6a/8c3a6cf0d4f44683a1169952b9648c2b/FLAG941d751b4 [2020-07-20 11:49:19,254 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:49:19,255 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-07-20 11:49:19,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3b9c1a6a/8c3a6cf0d4f44683a1169952b9648c2b/FLAG941d751b4 [2020-07-20 11:49:19,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3b9c1a6a/8c3a6cf0d4f44683a1169952b9648c2b [2020-07-20 11:49:19,614 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:49:19,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:49:19,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:49:19,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:49:19,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:49:19,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:49:19" (1/1) ... [2020-07-20 11:49:19,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@575d5ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:19, skipping insertion in model container [2020-07-20 11:49:19,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:49:19" (1/1) ... [2020-07-20 11:49:19,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:49:19,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:49:19,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:49:19,873 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:49:19,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:49:19,899 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:49:19,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:19 WrapperNode [2020-07-20 11:49:19,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:49:19,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:49:19,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:49:19,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:49:19,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:19" (1/1) ... [2020-07-20 11:49:19,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:19" (1/1) ... [2020-07-20 11:49:19,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:19" (1/1) ... [2020-07-20 11:49:19,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:19" (1/1) ... [2020-07-20 11:49:19,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:19" (1/1) ... [2020-07-20 11:49:20,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:19" (1/1) ... [2020-07-20 11:49:20,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:19" (1/1) ... [2020-07-20 11:49:20,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:49:20,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:49:20,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:49:20,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:49:20,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:19" (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 11:49:20,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:49:20,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:49:20,059 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:49:20,060 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:49:20,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:49:20,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:49:20,060 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:49:20,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:49:20,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:49:20,229 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:49:20,229 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 11:49:20,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:49:20 BoogieIcfgContainer [2020-07-20 11:49:20,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:49:20,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:49:20,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:49:20,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:49:20,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:49:19" (1/3) ... [2020-07-20 11:49:20,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a7fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:49:20, skipping insertion in model container [2020-07-20 11:49:20,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:19" (2/3) ... [2020-07-20 11:49:20,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a7fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:49:20, skipping insertion in model container [2020-07-20 11:49:20,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:49:20" (3/3) ... [2020-07-20 11:49:20,241 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2020-07-20 11:49:20,252 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:49:20,259 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:49:20,273 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:49:20,297 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:49:20,297 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:49:20,297 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:49:20,298 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:49:20,298 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:49:20,298 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:49:20,298 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:49:20,298 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:49:20,314 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-20 11:49:20,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 11:49:20,318 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:20,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:20,319 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:20,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:20,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-07-20 11:49:20,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:20,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267110913] [2020-07-20 11:49:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:49:20,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:49:20,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:20,441 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 11:49:20,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:49:20,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267110913] [2020-07-20 11:49:20,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:49:20,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:49:20,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663454001] [2020-07-20 11:49:20,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:49:20,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:20,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:49:20,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:49:20,509 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-07-20 11:49:20,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:49:20,555 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-20 11:49:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:49:20,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-20 11:49:20,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:49:20,572 INFO L225 Difference]: With dead ends: 29 [2020-07-20 11:49:20,573 INFO L226 Difference]: Without dead ends: 12 [2020-07-20 11:49:20,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:49:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-20 11:49:20,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-20 11:49:20,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-20 11:49:20,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-20 11:49:20,610 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-20 11:49:20,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:49:20,611 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-20 11:49:20,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:49:20,611 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-20 11:49:20,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 11:49:20,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:20,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:20,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:20,830 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:20,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-07-20 11:49:20,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:20,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077456422] [2020-07-20 11:49:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:49:20,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:49:20,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:20,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:49:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:20,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077456422] [2020-07-20 11:49:20,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:49:20,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 11:49:20,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165473283] [2020-07-20 11:49:20,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:49:20,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:20,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:49:20,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:49:20,950 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-07-20 11:49:21,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:49:21,009 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-20 11:49:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:49:21,010 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-20 11:49:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:49:21,011 INFO L225 Difference]: With dead ends: 20 [2020-07-20 11:49:21,011 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 11:49:21,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:49:21,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 11:49:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 11:49:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 11:49:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-20 11:49:21,017 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2020-07-20 11:49:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:49:21,017 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-20 11:49:21,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:49:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-20 11:49:21,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:49:21,018 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:21,018 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:21,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:21,223 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:21,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:21,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 2 times [2020-07-20 11:49:21,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:21,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17190595] [2020-07-20 11:49:21,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:49:21,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 11:49:21,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:21,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:49:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:21,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17190595] [2020-07-20 11:49:21,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:49:21,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-20 11:49:21,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84156397] [2020-07-20 11:49:21,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:49:21,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:21,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:49:21,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:49:21,427 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-07-20 11:49:21,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:49:21,480 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-07-20 11:49:21,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:49:21,481 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-07-20 11:49:21,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:49:21,482 INFO L225 Difference]: With dead ends: 22 [2020-07-20 11:49:21,482 INFO L226 Difference]: Without dead ends: 17 [2020-07-20 11:49:21,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:49:21,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-20 11:49:21,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-20 11:49:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 11:49:21,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-20 11:49:21,488 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-07-20 11:49:21,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:49:21,488 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-20 11:49:21,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:49:21,489 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-20 11:49:21,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 11:49:21,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:21,490 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:21,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:21,704 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:21,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:21,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 3 times [2020-07-20 11:49:21,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:21,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763125174] [2020-07-20 11:49:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:49:21,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:49:21,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:21,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:49:21,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:49:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:22,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763125174] [2020-07-20 11:49:22,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:49:22,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2020-07-20 11:49:22,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867436905] [2020-07-20 11:49:22,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:49:22,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:22,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:49:22,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:49:22,170 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 19 states. [2020-07-20 11:49:22,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:49:22,277 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-07-20 11:49:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:49:22,278 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 16 [2020-07-20 11:49:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:49:22,278 INFO L225 Difference]: With dead ends: 21 [2020-07-20 11:49:22,279 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:49:22,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:49:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:49:22,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:49:22,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:49:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:49:22,281 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-07-20 11:49:22,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:49:22,281 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:49:22,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:49:22,281 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:49:22,281 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:49:22,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:22,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:49:22,606 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:49:22,606 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:49:22,606 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:49:22,606 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:49:22,606 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:49:22,606 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:49:22,607 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2020-07-20 11:49:22,607 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2020-07-20 11:49:22,607 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2020-07-20 11:49:22,607 INFO L264 CegarLoopResult]: At program point L14-2(lines 14 17) the Hoare annotation is: (or (= 4 main_~x~0) (= 1 main_~x~0) (= 5 main_~x~0) (= 6 main_~x~0) (= 0 main_~x~0) (= 2 main_~x~0) (= 3 main_~x~0)) [2020-07-20 11:49:22,608 INFO L264 CegarLoopResult]: At program point L14-3(lines 14 17) the Hoare annotation is: (= 6 main_~x~0) [2020-07-20 11:49:22,608 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-20 11:49:22,608 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-20 11:49:22,608 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 11:49:22,608 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-20 11:49:22,609 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-20 11:49:22,609 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-20 11:49:22,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:49:22 BoogieIcfgContainer [2020-07-20 11:49:22,626 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:49:22,629 INFO L168 Benchmark]: Toolchain (without parser) took 3012.37 ms. Allocated memory was 136.8 MB in the beginning and 231.7 MB in the end (delta: 94.9 MB). Free memory was 100.0 MB in the beginning and 154.6 MB in the end (delta: -54.6 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:49:22,630 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 136.8 MB. Free memory is still 118.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 11:49:22,631 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.71 ms. Allocated memory is still 136.8 MB. Free memory was 99.6 MB in the beginning and 90.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:49:22,632 INFO L168 Benchmark]: Boogie Preprocessor took 104.83 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 90.6 MB in the beginning and 180.8 MB in the end (delta: -90.2 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:49:22,633 INFO L168 Benchmark]: RCFGBuilder took 226.34 ms. Allocated memory is still 201.9 MB. Free memory was 180.8 MB in the beginning and 168.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:49:22,634 INFO L168 Benchmark]: TraceAbstraction took 2392.16 ms. Allocated memory was 201.9 MB in the beginning and 231.7 MB in the end (delta: 29.9 MB). Free memory was 168.9 MB in the beginning and 154.6 MB in the end (delta: 14.3 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:49:22,638 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 136.8 MB. Free memory is still 118.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 281.71 ms. Allocated memory is still 136.8 MB. Free memory was 99.6 MB in the beginning and 90.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.83 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 90.6 MB in the beginning and 180.8 MB in the end (delta: -90.2 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 226.34 ms. Allocated memory is still 201.9 MB. Free memory was 180.8 MB in the beginning and 168.9 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2392.16 ms. Allocated memory was 201.9 MB in the beginning and 231.7 MB in the end (delta: 29.9 MB). Free memory was 168.9 MB in the beginning and 154.6 MB in the end (delta: 14.3 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 14]: Loop Invariant Derived loop invariant: (((((4 == x || 1 == x) || 5 == x) || 6 == x) || 0 == x) || 2 == x) || 3 == x - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.1s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 2 SDslu, 160 SDs, 0 SdLazy, 152 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 19 NumberOfFragments, 30 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 25 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 3551 SizeOfPredicates, 5 NumberOfNonLiveVariables, 151 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/64 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...