/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:07:32,780 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-09-24 15:07:32,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:07:32,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:07:32,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:07:32,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:07:32,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:07:32,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:07:32,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:07:32,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:07:32,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:07:32,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:07:32,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:07:32,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:07:32,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:07:32,882 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 15:07:32,907 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:07:32,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:07:32,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:07:32,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:07:32,909 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:07:32,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:07:32,910 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:07:32,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:07:32,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:07:32,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:07:32,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:07:32,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:07:32,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:07:32,911 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:07:32,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:07:32,912 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:07:32,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:07:32,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:07:32,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:07:32,912 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:07:32,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:07:32,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:07:32,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:07:32,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:07:32,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:07:32,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:07:32,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:07:32,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:07:32,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:07:32,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 15:07:33,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:07:33,411 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:07:33,416 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:07:33,418 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:07:33,418 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:07:33,421 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-24 15:07:33,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3124aaffc/883c16c00ff94837b6698ddf200b5def/FLAGe5049f030 [2020-09-24 15:07:34,050 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:07:34,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-09-24 15:07:34,060 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3124aaffc/883c16c00ff94837b6698ddf200b5def/FLAGe5049f030 [2020-09-24 15:07:34,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3124aaffc/883c16c00ff94837b6698ddf200b5def [2020-09-24 15:07:34,401 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:07:34,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:07:34,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:07:34,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:07:34,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:07:34,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:07:34" (1/1) ... [2020-09-24 15:07:34,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b495c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:34, skipping insertion in model container [2020-09-24 15:07:34,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:07:34" (1/1) ... [2020-09-24 15:07:34,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:07:34,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:07:34,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:07:34,685 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:07:34,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:07:34,725 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:07:34,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:34 WrapperNode [2020-09-24 15:07:34,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:07:34,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:07:34,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:07:34,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:07:34,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:34" (1/1) ... [2020-09-24 15:07:34,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:34" (1/1) ... [2020-09-24 15:07:34,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:34" (1/1) ... [2020-09-24 15:07:34,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:34" (1/1) ... [2020-09-24 15:07:34,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:34" (1/1) ... [2020-09-24 15:07:34,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:34" (1/1) ... [2020-09-24 15:07:34,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:34" (1/1) ... [2020-09-24 15:07:34,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:07:34,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:07:34,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:07:34,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:07:34,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:07:34,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:07:34,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:07:34,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 15:07:34,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:07:34,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:07:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 15:07:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 15:07:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:07:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:07:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:07:35,167 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:07:35,168 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 15:07:35,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:07:35 BoogieIcfgContainer [2020-09-24 15:07:35,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:07:35,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:07:35,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:07:35,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:07:35,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:07:34" (1/3) ... [2020-09-24 15:07:35,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@325db76a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:07:35, skipping insertion in model container [2020-09-24 15:07:35,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:34" (2/3) ... [2020-09-24 15:07:35,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@325db76a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:07:35, skipping insertion in model container [2020-09-24 15:07:35,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:07:35" (3/3) ... [2020-09-24 15:07:35,183 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-09-24 15:07:35,194 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:07:35,204 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:07:35,227 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:07:35,257 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:07:35,257 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:07:35,257 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:07:35,257 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:07:35,258 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:07:35,258 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:07:35,258 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:07:35,258 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:07:35,278 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-24 15:07:35,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 15:07:35,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:35,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:35,286 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:35,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:35,295 INFO L82 PathProgramCache]: Analyzing trace with hash -290415040, now seen corresponding path program 1 times [2020-09-24 15:07:35,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:35,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675501051] [2020-09-24 15:07:35,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:35,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:35,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675501051] [2020-09-24 15:07:35,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:35,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 15:07:35,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597424189] [2020-09-24 15:07:35,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 15:07:35,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:35,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 15:07:35,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 15:07:35,481 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-09-24 15:07:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:35,508 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-09-24 15:07:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 15:07:35,510 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-24 15:07:35,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:35,518 INFO L225 Difference]: With dead ends: 38 [2020-09-24 15:07:35,519 INFO L226 Difference]: Without dead ends: 21 [2020-09-24 15:07:35,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 15:07:35,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-24 15:07:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-24 15:07:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-24 15:07:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-24 15:07:35,566 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2020-09-24 15:07:35,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:35,566 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-24 15:07:35,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 15:07:35,567 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-24 15:07:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 15:07:35,568 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:35,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:35,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:07:35,569 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:35,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:35,569 INFO L82 PathProgramCache]: Analyzing trace with hash -304267855, now seen corresponding path program 1 times [2020-09-24 15:07:35,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:35,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462732713] [2020-09-24 15:07:35,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:35,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:35,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462732713] [2020-09-24 15:07:35,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:35,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:07:35,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463974602] [2020-09-24 15:07:35,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:07:35,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:35,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:07:35,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:07:35,685 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-09-24 15:07:35,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:35,733 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-24 15:07:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 15:07:35,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-24 15:07:35,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:35,735 INFO L225 Difference]: With dead ends: 28 [2020-09-24 15:07:35,735 INFO L226 Difference]: Without dead ends: 23 [2020-09-24 15:07:35,737 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 [2020-09-24 15:07:35,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-24 15:07:35,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-09-24 15:07:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 15:07:35,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-24 15:07:35,743 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2020-09-24 15:07:35,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:35,744 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-24 15:07:35,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:07:35,744 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-24 15:07:35,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 15:07:35,745 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:35,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:35,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:07:35,746 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:35,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:35,747 INFO L82 PathProgramCache]: Analyzing trace with hash -887516915, now seen corresponding path program 1 times [2020-09-24 15:07:35,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:35,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332113664] [2020-09-24 15:07:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:36,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:36,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332113664] [2020-09-24 15:07:36,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:36,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:07:36,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777326080] [2020-09-24 15:07:36,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:07:36,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:36,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:07:36,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:07:36,254 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2020-09-24 15:07:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:36,542 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-09-24 15:07:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:07:36,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-24 15:07:36,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:36,543 INFO L225 Difference]: With dead ends: 35 [2020-09-24 15:07:36,544 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 15:07:36,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-09-24 15:07:36,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 15:07:36,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-09-24 15:07:36,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 15:07:36,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-24 15:07:36,552 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-09-24 15:07:36,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:36,552 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-24 15:07:36,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:07:36,552 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-24 15:07:36,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 15:07:36,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:36,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:36,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:07:36,554 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:36,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:36,555 INFO L82 PathProgramCache]: Analyzing trace with hash -507920327, now seen corresponding path program 1 times [2020-09-24 15:07:36,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:36,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296345481] [2020-09-24 15:07:36,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:36,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:36,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296345481] [2020-09-24 15:07:36,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:07:36,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 15:07:36,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57746247] [2020-09-24 15:07:36,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 15:07:36,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:36,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 15:07:36,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 15:07:36,593 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 3 states. [2020-09-24 15:07:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:36,614 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-09-24 15:07:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 15:07:36,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-24 15:07:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:36,616 INFO L225 Difference]: With dead ends: 40 [2020-09-24 15:07:36,616 INFO L226 Difference]: Without dead ends: 28 [2020-09-24 15:07:36,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 15:07:36,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-24 15:07:36,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-24 15:07:36,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 15:07:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-24 15:07:36,623 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2020-09-24 15:07:36,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:36,623 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-24 15:07:36,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 15:07:36,623 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-24 15:07:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 15:07:36,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:36,625 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:36,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:07:36,625 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:36,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:36,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1934159721, now seen corresponding path program 2 times [2020-09-24 15:07:36,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:36,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462035460] [2020-09-24 15:07:36,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:37,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:07:37,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462035460] [2020-09-24 15:07:37,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:37,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 15:07:37,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143450441] [2020-09-24 15:07:37,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 15:07:37,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:37,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 15:07:37,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:07:37,077 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 13 states. [2020-09-24 15:07:37,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:37,458 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-09-24 15:07:37,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 15:07:37,459 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-09-24 15:07:37,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:37,460 INFO L225 Difference]: With dead ends: 40 [2020-09-24 15:07:37,460 INFO L226 Difference]: Without dead ends: 35 [2020-09-24 15:07:37,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-24 15:07:37,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-24 15:07:37,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-09-24 15:07:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-24 15:07:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-09-24 15:07:37,473 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-09-24 15:07:37,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:37,476 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-09-24 15:07:37,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 15:07:37,476 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-09-24 15:07:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-24 15:07:37,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:37,479 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:37,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:07:37,479 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:37,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:37,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1064709469, now seen corresponding path program 1 times [2020-09-24 15:07:37,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:37,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46423585] [2020-09-24 15:07:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:37,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:37,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46423585] [2020-09-24 15:07:37,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:37,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 15:07:37,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455032673] [2020-09-24 15:07:37,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:07:37,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:37,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:07:37,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:07:37,558 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2020-09-24 15:07:37,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:37,613 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-09-24 15:07:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:07:37,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-09-24 15:07:37,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:37,615 INFO L225 Difference]: With dead ends: 50 [2020-09-24 15:07:37,615 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 15:07:37,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:07:37,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 15:07:37,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-09-24 15:07:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 15:07:37,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-24 15:07:37,622 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2020-09-24 15:07:37,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:37,623 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-24 15:07:37,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:07:37,623 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-24 15:07:37,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 15:07:37,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:37,624 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:37,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:07:37,625 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:37,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:37,625 INFO L82 PathProgramCache]: Analyzing trace with hash -674418815, now seen corresponding path program 2 times [2020-09-24 15:07:37,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:37,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095358874] [2020-09-24 15:07:37,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:37,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:07:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:07:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:07:37,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095358874] [2020-09-24 15:07:37,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:07:37,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:07:37,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349862852] [2020-09-24 15:07:37,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:07:37,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:07:37,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:07:37,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:07:37,702 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 7 states. [2020-09-24 15:07:37,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:07:37,792 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-09-24 15:07:37,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:07:37,793 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-24 15:07:37,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:07:37,794 INFO L225 Difference]: With dead ends: 56 [2020-09-24 15:07:37,794 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 15:07:37,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:07:37,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 15:07:37,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-24 15:07:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 15:07:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-24 15:07:37,802 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2020-09-24 15:07:37,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:07:37,802 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-24 15:07:37,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:07:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-24 15:07:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 15:07:37,804 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:07:37,804 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:07:37,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:07:37,804 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:07:37,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:07:37,805 INFO L82 PathProgramCache]: Analyzing trace with hash -809826651, now seen corresponding path program 3 times [2020-09-24 15:07:37,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:07:37,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252732767] [2020-09-24 15:07:37,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:07:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 15:07:37,824 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 15:07:37,825 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 15:07:37,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:07:37,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:07:37 BoogieIcfgContainer [2020-09-24 15:07:37,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 15:07:37,852 INFO L168 Benchmark]: Toolchain (without parser) took 3448.15 ms. Allocated memory was 138.4 MB in the beginning and 233.8 MB in the end (delta: 95.4 MB). Free memory was 102.1 MB in the beginning and 80.7 MB in the end (delta: 21.4 MB). Peak memory consumption was 116.8 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:37,853 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 15:07:37,854 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.68 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 92.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:37,855 INFO L168 Benchmark]: Boogie Preprocessor took 130.07 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.2 MB in the beginning and 182.0 MB in the end (delta: -89.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:37,864 INFO L168 Benchmark]: RCFGBuilder took 315.89 ms. Allocated memory is still 202.4 MB. Free memory was 182.0 MB in the beginning and 169.3 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:37,867 INFO L168 Benchmark]: TraceAbstraction took 2674.56 ms. Allocated memory was 202.4 MB in the beginning and 233.8 MB in the end (delta: 31.5 MB). Free memory was 168.6 MB in the beginning and 80.7 MB in the end (delta: 87.9 MB). Peak memory consumption was 119.3 MB. Max. memory is 7.1 GB. [2020-09-24 15:07:37,881 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 317.68 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 92.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.07 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.2 MB in the beginning and 182.0 MB in the end (delta: -89.8 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.89 ms. Allocated memory is still 202.4 MB. Free memory was 182.0 MB in the beginning and 169.3 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2674.56 ms. Allocated memory was 202.4 MB in the beginning and 233.8 MB in the end (delta: 31.5 MB). Free memory was 168.6 MB in the beginning and 80.7 MB in the end (delta: 87.9 MB). Peak memory consumption was 119.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND TRUE i==4 [L15] sn=-10 [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.5s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 131 SDtfs, 32 SDslu, 379 SDs, 0 SdLazy, 310 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=7, 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, 7 MinimizatonAttempts, 12 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 194 NumberOfCodeBlocks, 194 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 148 ConstructedInterpolants, 0 QuantifiedInterpolants, 13352 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 16/39 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...