/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 -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 0.1.25-5644d1e-m [2020-08-19 03:41:58,598 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 03:41:58,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 03:41:58,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 03:41:58,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 03:41:58,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 03:41:58,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 03:41:58,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 03:41:58,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 03:41:58,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 03:41:58,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 03:41:58,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 03:41:58,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 03:41:58,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 03:41:58,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 03:41:58,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 03:41:58,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 03:41:58,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 03:41:58,660 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 [2020-08-19 03:41:58,681 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 03:41:58,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 03:41:58,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 03:41:58,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 03:41:58,683 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 03:41:58,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 03:41:58,684 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 03:41:58,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 03:41:58,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 03:41:58,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 03:41:58,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 03:41:58,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 03:41:58,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 03:41:58,685 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 03:41:58,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 03:41:58,685 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 03:41:58,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 03:41:58,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 03:41:58,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 03:41:58,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 03:41:58,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 03:41:58,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 03:41:58,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 03:41:58,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 03:41:58,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 03:41:58,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 03:41:58,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 03:41:58,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 03:41:58,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 03:41:58,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.1; [2020-08-19 03:41:59,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 03:41:59,015 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 03:41:59,019 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 03:41:59,020 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 03:41:59,021 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 03:41:59,021 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-08-19 03:41:59,096 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f125cec07/927e4190f90c418c94d45284f63d22bf/FLAG0388d233c [2020-08-19 03:41:59,505 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 03:41:59,506 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-08-19 03:41:59,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f125cec07/927e4190f90c418c94d45284f63d22bf/FLAG0388d233c [2020-08-19 03:41:59,877 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f125cec07/927e4190f90c418c94d45284f63d22bf [2020-08-19 03:41:59,889 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 03:41:59,891 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 03:41:59,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 03:41:59,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 03:41:59,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 03:41:59,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:41:59" (1/1) ... [2020-08-19 03:41:59,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1808924a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:41:59, skipping insertion in model container [2020-08-19 03:41:59,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 03:41:59" (1/1) ... [2020-08-19 03:41:59,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 03:41:59,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 03:42:00,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:42:00,185 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 03:42:00,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 03:42:00,215 INFO L208 MainTranslator]: Completed translation [2020-08-19 03:42:00,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:42:00 WrapperNode [2020-08-19 03:42:00,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 03:42:00,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 03:42:00,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 03:42:00,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 03:42:00,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:42:00" (1/1) ... [2020-08-19 03:42:00,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:42:00" (1/1) ... [2020-08-19 03:42:00,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:42:00" (1/1) ... [2020-08-19 03:42:00,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:42:00" (1/1) ... [2020-08-19 03:42:00,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:42:00" (1/1) ... [2020-08-19 03:42:00,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:42:00" (1/1) ... [2020-08-19 03:42:00,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:42:00" (1/1) ... [2020-08-19 03:42:00,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 03:42:00,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 03:42:00,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 03:42:00,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 03:42:00,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:42:00" (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 [2020-08-19 03:42:00,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 03:42:00,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 03:42:00,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 03:42:00,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 03:42:00,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 03:42:00,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 03:42:00,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 03:42:00,395 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 03:42:00,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 03:42:00,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 03:42:00,584 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 03:42:00,585 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 03:42:00,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:42:00 BoogieIcfgContainer [2020-08-19 03:42:00,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 03:42:00,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 03:42:00,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 03:42:00,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 03:42:00,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 03:41:59" (1/3) ... [2020-08-19 03:42:00,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70860d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:42:00, skipping insertion in model container [2020-08-19 03:42:00,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 03:42:00" (2/3) ... [2020-08-19 03:42:00,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70860d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 03:42:00, skipping insertion in model container [2020-08-19 03:42:00,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 03:42:00" (3/3) ... [2020-08-19 03:42:00,598 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-08-19 03:42:00,610 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 03:42:00,618 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 03:42:00,634 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 03:42:00,661 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 03:42:00,661 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 03:42:00,661 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 03:42:00,661 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 03:42:00,662 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 03:42:00,662 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 03:42:00,662 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 03:42:00,662 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 03:42:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-19 03:42:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-19 03:42:00,700 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:42:00,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:42:00,702 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:42:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:42:00,712 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-08-19 03:42:00,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:42:00,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781169458] [2020-08-19 03:42:00,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:42:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:42:00,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:42:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:42:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:42:00,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781169458] [2020-08-19 03:42:00,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:42:00,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-19 03:42:00,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484787277] [2020-08-19 03:42:00,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-19 03:42:00,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:42:00,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-19 03:42:00,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-19 03:42:00,900 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-19 03:42:00,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:42:00,920 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-19 03:42:00,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-19 03:42:00,922 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-19 03:42:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:42:00,929 INFO L225 Difference]: With dead ends: 30 [2020-08-19 03:42:00,929 INFO L226 Difference]: Without dead ends: 13 [2020-08-19 03:42:00,932 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 [2020-08-19 03:42:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-19 03:42:00,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-19 03:42:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-19 03:42:00,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-08-19 03:42:00,968 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-08-19 03:42:00,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:42:00,969 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-08-19 03:42:00,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-19 03:42:00,969 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-08-19 03:42:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-19 03:42:00,970 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:42:00,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:42:00,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 03:42:00,971 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:42:00,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:42:00,972 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-08-19 03:42:00,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:42:00,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657795316] [2020-08-19 03:42:00,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:42:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:42:01,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:42:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:42:01,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:42:01,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657795316] [2020-08-19 03:42:01,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:42:01,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 03:42:01,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064440051] [2020-08-19 03:42:01,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 03:42:01,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:42:01,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 03:42:01,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:42:01,074 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-08-19 03:42:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:42:01,137 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-08-19 03:42:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 03:42:01,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-19 03:42:01,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:42:01,139 INFO L225 Difference]: With dead ends: 19 [2020-08-19 03:42:01,139 INFO L226 Difference]: Without dead ends: 14 [2020-08-19 03:42:01,140 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 [2020-08-19 03:42:01,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-19 03:42:01,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-19 03:42:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-19 03:42:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-08-19 03:42:01,146 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-08-19 03:42:01,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:42:01,146 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-08-19 03:42:01,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 03:42:01,147 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-08-19 03:42:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 03:42:01,147 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:42:01,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:42:01,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 03:42:01,148 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:42:01,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:42:01,149 INFO L82 PathProgramCache]: Analyzing trace with hash 137668885, now seen corresponding path program 1 times [2020-08-19 03:42:01,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:42:01,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567145202] [2020-08-19 03:42:01,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:42:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:42:01,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:42:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:42:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:42:01,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567145202] [2020-08-19 03:42:01,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:42:01,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 03:42:01,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281527794] [2020-08-19 03:42:01,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 03:42:01,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:42:01,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 03:42:01,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-19 03:42:01,387 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2020-08-19 03:42:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:42:01,471 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-08-19 03:42:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 03:42:01,472 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-08-19 03:42:01,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:42:01,473 INFO L225 Difference]: With dead ends: 22 [2020-08-19 03:42:01,473 INFO L226 Difference]: Without dead ends: 17 [2020-08-19 03:42:01,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-19 03:42:01,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-19 03:42:01,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-19 03:42:01,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-19 03:42:01,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-08-19 03:42:01,480 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-08-19 03:42:01,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:42:01,480 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-08-19 03:42:01,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 03:42:01,481 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-08-19 03:42:01,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 03:42:01,481 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:42:01,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:42:01,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 03:42:01,482 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:42:01,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:42:01,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-08-19 03:42:01,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:42:01,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586328657] [2020-08-19 03:42:01,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:42:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:42:01,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:42:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:42:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:42:01,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586328657] [2020-08-19 03:42:01,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 03:42:01,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 03:42:01,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55517496] [2020-08-19 03:42:01,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 03:42:01,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:42:01,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 03:42:01,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 03:42:01,513 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2020-08-19 03:42:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:42:01,531 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-08-19 03:42:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 03:42:01,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-08-19 03:42:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:42:01,533 INFO L225 Difference]: With dead ends: 25 [2020-08-19 03:42:01,533 INFO L226 Difference]: Without dead ends: 17 [2020-08-19 03:42:01,533 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 [2020-08-19 03:42:01,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-19 03:42:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-19 03:42:01,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-19 03:42:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-08-19 03:42:01,539 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-08-19 03:42:01,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:42:01,539 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-08-19 03:42:01,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 03:42:01,540 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-08-19 03:42:01,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 03:42:01,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:42:01,541 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:42:01,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 03:42:01,541 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:42:01,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:42:01,542 INFO L82 PathProgramCache]: Analyzing trace with hash -335184905, now seen corresponding path program 2 times [2020-08-19 03:42:01,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:42:01,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922334293] [2020-08-19 03:42:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:42:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:42:01,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:42:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:42:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 03:42:01,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922334293] [2020-08-19 03:42:01,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:42:01,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 03:42:01,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141835195] [2020-08-19 03:42:01,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 03:42:01,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:42:01,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 03:42:01,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-19 03:42:01,817 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2020-08-19 03:42:01,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:42:01,972 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-08-19 03:42:01,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 03:42:01,972 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-08-19 03:42:01,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:42:01,973 INFO L225 Difference]: With dead ends: 25 [2020-08-19 03:42:01,974 INFO L226 Difference]: Without dead ends: 20 [2020-08-19 03:42:01,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-08-19 03:42:01,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-19 03:42:01,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-08-19 03:42:01,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 03:42:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-19 03:42:01,980 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 16 [2020-08-19 03:42:01,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:42:01,980 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-19 03:42:01,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 03:42:01,981 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-19 03:42:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 03:42:01,981 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:42:01,982 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:42:01,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 03:42:01,982 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:42:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:42:01,983 INFO L82 PathProgramCache]: Analyzing trace with hash -2110192267, now seen corresponding path program 1 times [2020-08-19 03:42:01,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:42:01,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013329259] [2020-08-19 03:42:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:42:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:42:02,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:42:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:42:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:42:02,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013329259] [2020-08-19 03:42:02,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:42:02,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-19 03:42:02,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287207739] [2020-08-19 03:42:02,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 03:42:02,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:42:02,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 03:42:02,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-19 03:42:02,014 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-08-19 03:42:02,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:42:02,037 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-19 03:42:02,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 03:42:02,038 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-08-19 03:42:02,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:42:02,039 INFO L225 Difference]: With dead ends: 30 [2020-08-19 03:42:02,039 INFO L226 Difference]: Without dead ends: 22 [2020-08-19 03:42:02,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-19 03:42:02,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-19 03:42:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-19 03:42:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 03:42:02,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-08-19 03:42:02,046 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-08-19 03:42:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:42:02,046 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-08-19 03:42:02,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 03:42:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-08-19 03:42:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 03:42:02,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:42:02,047 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:42:02,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 03:42:02,048 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:42:02,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:42:02,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1404719277, now seen corresponding path program 2 times [2020-08-19 03:42:02,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:42:02,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283254209] [2020-08-19 03:42:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:42:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:42:02,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 03:42:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 03:42:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 03:42:02,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283254209] [2020-08-19 03:42:02,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 03:42:02,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 03:42:02,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653945914] [2020-08-19 03:42:02,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 03:42:02,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 03:42:02,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 03:42:02,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:42:02,092 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-08-19 03:42:02,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 03:42:02,123 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-19 03:42:02,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 03:42:02,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-19 03:42:02,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 03:42:02,125 INFO L225 Difference]: With dead ends: 33 [2020-08-19 03:42:02,125 INFO L226 Difference]: Without dead ends: 25 [2020-08-19 03:42:02,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-19 03:42:02,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-19 03:42:02,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-08-19 03:42:02,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-19 03:42:02,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-19 03:42:02,132 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-08-19 03:42:02,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 03:42:02,132 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-19 03:42:02,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 03:42:02,132 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-19 03:42:02,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 03:42:02,133 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 03:42:02,133 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 03:42:02,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 03:42:02,134 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 03:42:02,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 03:42:02,134 INFO L82 PathProgramCache]: Analyzing trace with hash 66146485, now seen corresponding path program 3 times [2020-08-19 03:42:02,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 03:42:02,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405851058] [2020-08-19 03:42:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 03:42:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 03:42:02,151 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 03:42:02,151 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 03:42:02,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 03:42:02,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 03:42:02 BoogieIcfgContainer [2020-08-19 03:42:02,171 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 03:42:02,174 INFO L168 Benchmark]: Toolchain (without parser) took 2282.74 ms. Allocated memory was 139.5 MB in the beginning and 234.9 MB in the end (delta: 95.4 MB). Free memory was 102.4 MB in the beginning and 169.2 MB in the end (delta: -66.8 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2020-08-19 03:42:02,175 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 03:42:02,176 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.06 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 92.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-19 03:42:02,177 INFO L168 Benchmark]: Boogie Preprocessor took 114.32 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 181.4 MB in the end (delta: -88.7 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-19 03:42:02,178 INFO L168 Benchmark]: RCFGBuilder took 258.49 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 169.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-08-19 03:42:02,179 INFO L168 Benchmark]: TraceAbstraction took 1580.99 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 168.8 MB in the beginning and 169.2 MB in the end (delta: -450.1 kB). Peak memory consumption was 32.1 MB. Max. memory is 7.1 GB. [2020-08-19 03:42:02,183 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 323.06 ms. Allocated memory is still 139.5 MB. Free memory was 102.2 MB in the beginning and 92.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.32 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 181.4 MB in the end (delta: -88.7 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 258.49 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 169.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1580.99 ms. Allocated memory was 202.4 MB in the beginning and 234.9 MB in the end (delta: 32.5 MB). Free memory was 168.8 MB in the beginning and 169.2 MB in the end (delta: -450.1 kB). Peak memory consumption was 32.1 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, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 81 SDtfs, 12 SDslu, 157 SDs, 0 SdLazy, 150 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 119 NumberOfCodeBlocks, 119 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 4662 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 10/24 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...