/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:30:40,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:30:40,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:30:40,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:30:40,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:30:40,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:30:40,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:30:40,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:30:40,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:30:40,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:30:40,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:30:40,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:30:40,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:30:40,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:30:40,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:30:40,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:30:40,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:30:40,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:30:40,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:30:40,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:30:40,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:30:40,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:30:40,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:30:40,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:30:40,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:30:40,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:30:40,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:30:40,203 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:30:40,204 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:30:40,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-21 10:30:40,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:30:40,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:30:40,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:30:40,214 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 [2020-09-21 10:30:40,261 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:30:40,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:30:40,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:30:40,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:30:40,263 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:30:40,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:30:40,264 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:30:40,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:30:40,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:30:40,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:30:40,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:30:40,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:30:40,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:30:40,267 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:30:40,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:30:40,267 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:30:40,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:30:40,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:30:40,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:30:40,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:30:40,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:30:40,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:30:40,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:30:40,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:30:40,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:30:40,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:30:40,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:30:40,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:30:40,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:30:40,270 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 -> false [2020-09-21 10:30:40,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:30:40,749 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:30:40,753 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:30:40,756 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:30:40,757 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:30:40,758 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt2.c [2020-09-21 10:30:40,846 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbc071a87/be01c6131b5f4ef2937744075dda20d9/FLAG528625c9f [2020-09-21 10:30:41,375 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:30:41,376 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt2.c [2020-09-21 10:30:41,384 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbc071a87/be01c6131b5f4ef2937744075dda20d9/FLAG528625c9f [2020-09-21 10:30:41,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bbc071a87/be01c6131b5f4ef2937744075dda20d9 [2020-09-21 10:30:41,704 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:30:41,710 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:30:41,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:30:41,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:30:41,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:30:41,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:30:41" (1/1) ... [2020-09-21 10:30:41,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d7e22e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:41, skipping insertion in model container [2020-09-21 10:30:41,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:30:41" (1/1) ... [2020-09-21 10:30:41,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:30:41,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:30:41,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:30:41,983 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:30:42,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:30:42,021 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:30:42,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:42 WrapperNode [2020-09-21 10:30:42,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:30:42,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:30:42,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:30:42,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:30:42,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:42" (1/1) ... [2020-09-21 10:30:42,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:42" (1/1) ... [2020-09-21 10:30:42,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:42" (1/1) ... [2020-09-21 10:30:42,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:42" (1/1) ... [2020-09-21 10:30:42,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:42" (1/1) ... [2020-09-21 10:30:42,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:42" (1/1) ... [2020-09-21 10:30:42,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:42" (1/1) ... [2020-09-21 10:30:42,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:30:42,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:30:42,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:30:42,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:30:42,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:42" (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 [2020-09-21 10:30:42,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:30:42,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:30:42,226 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 10:30:42,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:30:42,227 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:30:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:30:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:30:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 10:30:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:30:42,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:30:42,228 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:30:42,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:30:42,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:30:42,447 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:30:42,447 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:30:42,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:30:42 BoogieIcfgContainer [2020-09-21 10:30:42,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:30:42,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:30:42,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:30:42,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:30:42,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:30:41" (1/3) ... [2020-09-21 10:30:42,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f53517e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:30:42, skipping insertion in model container [2020-09-21 10:30:42,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:42" (2/3) ... [2020-09-21 10:30:42,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f53517e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:30:42, skipping insertion in model container [2020-09-21 10:30:42,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:30:42" (3/3) ... [2020-09-21 10:30:42,462 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt2.c [2020-09-21 10:30:42,473 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:30:42,483 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:30:42,505 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:30:42,530 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:30:42,531 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:30:42,531 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:30:42,531 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:30:42,531 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:30:42,531 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:30:42,531 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:30:42,531 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:30:42,550 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-21 10:30:42,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 10:30:42,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:42,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:42,558 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:42,565 INFO L82 PathProgramCache]: Analyzing trace with hash -647006370, now seen corresponding path program 1 times [2020-09-21 10:30:42,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:42,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691942486] [2020-09-21 10:30:42,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:42,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:42,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691942486] [2020-09-21 10:30:42,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:30:42,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:30:42,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458353926] [2020-09-21 10:30:42,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:30:42,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:42,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:30:42,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:30:42,857 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-09-21 10:30:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:42,922 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-09-21 10:30:42,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:30:42,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-21 10:30:42,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:42,935 INFO L225 Difference]: With dead ends: 34 [2020-09-21 10:30:42,936 INFO L226 Difference]: Without dead ends: 15 [2020-09-21 10:30:42,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:30:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-09-21 10:30:42,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-09-21 10:30:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-09-21 10:30:42,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-09-21 10:30:42,996 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-09-21 10:30:42,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:42,997 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-09-21 10:30:42,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:30:42,997 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-09-21 10:30:42,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 10:30:42,998 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:42,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:42,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:30:42,999 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:42,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:42,999 INFO L82 PathProgramCache]: Analyzing trace with hash -657165101, now seen corresponding path program 1 times [2020-09-21 10:30:43,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:43,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672456831] [2020-09-21 10:30:43,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:43,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:43,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672456831] [2020-09-21 10:30:43,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:30:43,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:30:43,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285434891] [2020-09-21 10:30:43,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:30:43,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:43,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:30:43,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:30:43,394 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-09-21 10:30:43,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:43,563 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-09-21 10:30:43,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:30:43,564 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-09-21 10:30:43,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:43,566 INFO L225 Difference]: With dead ends: 22 [2020-09-21 10:30:43,567 INFO L226 Difference]: Without dead ends: 17 [2020-09-21 10:30:43,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:30:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-09-21 10:30:43,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-09-21 10:30:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-21 10:30:43,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-09-21 10:30:43,575 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-09-21 10:30:43,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:43,576 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-09-21 10:30:43,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:30:43,576 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-09-21 10:30:43,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 10:30:43,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:43,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:43,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:30:43,578 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:43,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:43,578 INFO L82 PathProgramCache]: Analyzing trace with hash 523159493, now seen corresponding path program 1 times [2020-09-21 10:30:43,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:43,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638591516] [2020-09-21 10:30:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:44,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:44,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638591516] [2020-09-21 10:30:44,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:44,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 10:30:44,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572970861] [2020-09-21 10:30:44,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:30:44,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:44,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:30:44,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:30:44,216 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 12 states. [2020-09-21 10:30:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:46,700 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-09-21 10:30:46,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:30:46,701 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-21 10:30:46,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:46,703 INFO L225 Difference]: With dead ends: 34 [2020-09-21 10:30:46,703 INFO L226 Difference]: Without dead ends: 29 [2020-09-21 10:30:46,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:30:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-21 10:30:46,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2020-09-21 10:30:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-21 10:30:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-09-21 10:30:46,718 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-09-21 10:30:46,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:46,719 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-09-21 10:30:46,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:30:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-09-21 10:30:46,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 10:30:46,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:46,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:46,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:30:46,721 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:46,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:46,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1996800441, now seen corresponding path program 1 times [2020-09-21 10:30:46,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:46,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080553158] [2020-09-21 10:30:46,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:48,772 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2020-09-21 10:30:48,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:48,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080553158] [2020-09-21 10:30:48,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:30:48,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:30:48,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391679848] [2020-09-21 10:30:48,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:30:48,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:48,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:30:48,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:30:48,824 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-09-21 10:30:53,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:53,030 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-09-21 10:30:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:30:53,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-09-21 10:30:53,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:53,032 INFO L225 Difference]: With dead ends: 27 [2020-09-21 10:30:53,032 INFO L226 Difference]: Without dead ends: 19 [2020-09-21 10:30:53,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:30:53,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-21 10:30:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-09-21 10:30:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-21 10:30:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-09-21 10:30:53,039 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-09-21 10:30:53,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:53,039 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-09-21 10:30:53,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:30:53,040 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-09-21 10:30:53,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:30:53,040 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:53,041 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:53,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:30:53,041 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:53,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:53,042 INFO L82 PathProgramCache]: Analyzing trace with hash 675886995, now seen corresponding path program 2 times [2020-09-21 10:30:53,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:53,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211380430] [2020-09-21 10:30:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:53,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:53,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211380430] [2020-09-21 10:30:53,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:53,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:30:53,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636009229] [2020-09-21 10:30:53,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:30:53,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:53,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:30:53,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:30:53,223 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-09-21 10:30:53,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:53,300 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-09-21 10:30:53,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:30:53,302 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-21 10:30:53,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:53,303 INFO L225 Difference]: With dead ends: 29 [2020-09-21 10:30:53,303 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 10:30:53,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:30:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 10:30:53,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-09-21 10:30:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-21 10:30:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-21 10:30:53,314 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-09-21 10:30:53,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:53,315 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-21 10:30:53,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:30:53,315 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-21 10:30:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:30:53,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:53,318 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:53,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:30:53,318 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:53,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:53,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1844072939, now seen corresponding path program 1 times [2020-09-21 10:30:53,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:53,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902047077] [2020-09-21 10:30:53,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:53,657 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2020-09-21 10:30:53,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:30:53,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902047077] [2020-09-21 10:30:53,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:53,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:30:53,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135720179] [2020-09-21 10:30:53,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:30:53,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:53,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:30:53,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:30:53,772 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-09-21 10:30:53,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:53,903 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-09-21 10:30:53,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:30:53,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-09-21 10:30:53,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:53,904 INFO L225 Difference]: With dead ends: 20 [2020-09-21 10:30:53,904 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:30:53,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:30:53,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:30:53,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:30:53,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:30:53,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:30:53,906 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-09-21 10:30:53,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:53,906 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:30:53,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:30:53,906 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:30:53,906 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:30:53,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:30:53,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:30:54,117 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:30:54,118 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~SIZE~0 |old(~SIZE~0)|) [2020-09-21 10:30:54,118 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:30:54,118 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:30:54,119 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2020-09-21 10:30:54,119 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 10:30:54,119 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:30:54,119 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-21 10:30:54,119 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-21 10:30:54,119 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-09-21 10:30:54,119 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-21 10:30:54,119 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 31) the Hoare annotation is: true [2020-09-21 10:30:54,120 INFO L268 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-09-21 10:30:54,120 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 31) no Hoare annotation was computed. [2020-09-21 10:30:54,120 INFO L268 CegarLoopResult]: For program point L23(lines 23 26) no Hoare annotation was computed. [2020-09-21 10:30:54,120 INFO L268 CegarLoopResult]: For program point L23-2(lines 23 26) no Hoare annotation was computed. [2020-09-21 10:30:54,120 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 28) the Hoare annotation is: (let ((.cse2 (+ main_~i~0 main_~j~0))) (let ((.cse0 (<= main_~l~0 .cse2)) (.cse1 (<= .cse2 main_~l~0))) (or (and .cse0 .cse1 (<= main_~l~0 0) (<= 0 main_~l~0)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0)) (and .cse0 .cse1 (<= (+ (* 4294967296 (div main_~n~0 4294967296)) main_~l~0 1) (+ main_~i~0 main_~j~0 main_~n~0)))))) [2020-09-21 10:30:54,121 INFO L264 CegarLoopResult]: At program point L21-3(lines 21 28) the Hoare annotation is: (or (let ((.cse2 (div (+ main_~i~0 main_~j~0) 4294967296)) (.cse3 (div main_~l~0 4294967296))) (let ((.cse1 (* 4294967296 .cse3)) (.cse0 (+ (* 4294967296 .cse2) main_~l~0))) (and (< .cse0 (+ main_~i~0 main_~j~0 .cse1 1)) (< .cse2 (+ .cse3 1)) (<= (+ main_~i~0 main_~j~0 .cse1) .cse0)))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2020-09-21 10:30:54,121 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-21 10:30:54,121 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 31) no Hoare annotation was computed. [2020-09-21 10:30:54,121 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-21 10:30:54,121 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-21 10:30:54,122 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-21 10:30:54,122 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-21 10:30:54,122 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-21 10:30:54,122 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-21 10:30:54,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:30:54 BoogieIcfgContainer [2020-09-21 10:30:54,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:30:54,149 INFO L168 Benchmark]: Toolchain (without parser) took 12442.88 ms. Allocated memory was 148.9 MB in the beginning and 243.3 MB in the end (delta: 94.4 MB). Free memory was 105.2 MB in the beginning and 167.5 MB in the end (delta: -62.4 MB). Peak memory consumption was 32.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:30:54,150 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:30:54,151 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.89 ms. Allocated memory is still 148.9 MB. Free memory was 104.5 MB in the beginning and 94.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:30:54,152 INFO L168 Benchmark]: Boogie Preprocessor took 124.27 ms. Allocated memory was 148.9 MB in the beginning and 205.5 MB in the end (delta: 56.6 MB). Free memory was 94.9 MB in the beginning and 184.0 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-21 10:30:54,153 INFO L168 Benchmark]: RCFGBuilder took 304.46 ms. Allocated memory is still 205.5 MB. Free memory was 183.6 MB in the beginning and 170.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:30:54,153 INFO L168 Benchmark]: TraceAbstraction took 11692.98 ms. Allocated memory was 205.5 MB in the beginning and 243.3 MB in the end (delta: 37.7 MB). Free memory was 170.7 MB in the beginning and 167.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 40.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:30:54,157 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 311.89 ms. Allocated memory is still 148.9 MB. Free memory was 104.5 MB in the beginning and 94.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.27 ms. Allocated memory was 148.9 MB in the beginning and 205.5 MB in the end (delta: 56.6 MB). Free memory was 94.9 MB in the beginning and 184.0 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 304.46 ms. Allocated memory is still 205.5 MB. Free memory was 183.6 MB in the beginning and 170.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11692.98 ms. Allocated memory was 205.5 MB in the beginning and 243.3 MB in the end (delta: 37.7 MB). Free memory was 170.7 MB in the beginning and 167.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 40.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((((l <= i + j && i + j <= l) && l <= 0) && 0 <= l) || !(SIZE <= 20000001)) || !(20000001 <= SIZE)) || ((l <= i + j && i + j <= l) && 4294967296 * (n / 4294967296) + l + 1 <= i + j + n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.3s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 72 SDtfs, 102 SDslu, 103 SDs, 0 SdLazy, 199 SolverSat, 43 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 6.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 18 NumberOfFragments, 121 HoareAnnotationTreeSize, 12 FomulaSimplifications, 189 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 187 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 11306 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 7/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...