/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/terminator_03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:10:55,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:10:55,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:10:55,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:10:55,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:10:55,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:10:55,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:10:55,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:10:55,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:10:55,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:10:55,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:10:55,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:10:55,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:10:55,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:10:55,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:10:55,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:10:55,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:10:55,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:10:55,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:10:55,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:10:55,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:10:55,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:10:55,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:10:55,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:10:55,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 23:10:55,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 23:10:55,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 23:10:55,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 23:10:55,214 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 23:10:55,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 23:10:55,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 23:10:55,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 23:10:55,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 23:10:55,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 23:10:55,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 23:10:55,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 23:10:55,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 23:10:55,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 23:10:55,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:10:55,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:10:55,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:10:55,223 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:10:55,234 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:10:55,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:10:55,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:10:55,236 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:10:55,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:10:55,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:10:55,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:10:55,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:10:55,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:10:55,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:10:55,237 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:10:55,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:10:55,237 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:10:55,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:10:55,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:10:55,238 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:10:55,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:10:55,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:10:55,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:10:55,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:10:55,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:10:55,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:10:55,239 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-09-04 23:10:55,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:10:55,719 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:10:55,723 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:10:55,725 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:10:55,725 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:10:55,727 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_03-1.c [2020-09-04 23:10:55,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53b315346/23b619cdd80a4fde87c11a86faad626c/FLAG952213bd3 [2020-09-04 23:10:56,346 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:10:56,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/terminator_03-1.c [2020-09-04 23:10:56,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53b315346/23b619cdd80a4fde87c11a86faad626c/FLAG952213bd3 [2020-09-04 23:10:56,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53b315346/23b619cdd80a4fde87c11a86faad626c [2020-09-04 23:10:56,697 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:10:56,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:10:56,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:10:56,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:10:56,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:10:56,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:10:56" (1/1) ... [2020-09-04 23:10:56,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d72532b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:56, skipping insertion in model container [2020-09-04 23:10:56,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:10:56" (1/1) ... [2020-09-04 23:10:56,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:10:56,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:10:56,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:10:56,958 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:10:56,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:10:56,994 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:10:56,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:56 WrapperNode [2020-09-04 23:10:56,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:10:56,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:10:56,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:10:56,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:10:57,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:56" (1/1) ... [2020-09-04 23:10:57,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:56" (1/1) ... [2020-09-04 23:10:57,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:56" (1/1) ... [2020-09-04 23:10:57,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:56" (1/1) ... [2020-09-04 23:10:57,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:56" (1/1) ... [2020-09-04 23:10:57,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:56" (1/1) ... [2020-09-04 23:10:57,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:56" (1/1) ... [2020-09-04 23:10:57,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:10:57,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:10:57,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:10:57,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:10:57,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:56" (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 [2020-09-04 23:10:57,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:10:57,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:10:57,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:10:57,185 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:10:57,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:10:57,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:10:57,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 23:10:57,185 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:10:57,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:10:57,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:10:57,378 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:10:57,379 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 23:10:57,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:10:57 BoogieIcfgContainer [2020-09-04 23:10:57,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:10:57,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:10:57,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:10:57,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:10:57,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:10:56" (1/3) ... [2020-09-04 23:10:57,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60eea86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:10:57, skipping insertion in model container [2020-09-04 23:10:57,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:10:56" (2/3) ... [2020-09-04 23:10:57,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60eea86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:10:57, skipping insertion in model container [2020-09-04 23:10:57,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:10:57" (3/3) ... [2020-09-04 23:10:57,394 INFO L109 eAbstractionObserver]: Analyzing ICFG terminator_03-1.c [2020-09-04 23:10:57,405 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:10:57,415 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:10:57,437 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:10:57,465 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:10:57,465 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:10:57,466 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:10:57,466 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:10:57,466 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:10:57,466 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:10:57,467 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:10:57,467 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:10:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-09-04 23:10:57,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 23:10:57,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:57,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:57,495 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:57,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:57,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1947240340, now seen corresponding path program 1 times [2020-09-04 23:10:57,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:57,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81236005] [2020-09-04 23:10:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:57,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:10:57,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81236005] [2020-09-04 23:10:57,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:10:57,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:10:57,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625269642] [2020-09-04 23:10:57,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:10:57,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:57,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:10:57,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:10:57,784 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-09-04 23:10:57,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:57,904 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-09-04 23:10:57,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:10:57,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-04 23:10:57,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:57,915 INFO L225 Difference]: With dead ends: 45 [2020-09-04 23:10:57,915 INFO L226 Difference]: Without dead ends: 18 [2020-09-04 23:10:57,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:10:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-04 23:10:57,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-04 23:10:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-04 23:10:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-09-04 23:10:57,961 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-09-04 23:10:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:57,961 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-09-04 23:10:57,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:10:57,962 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-09-04 23:10:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 23:10:57,962 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:57,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:57,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:10:57,963 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:57,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:57,964 INFO L82 PathProgramCache]: Analyzing trace with hash -219943500, now seen corresponding path program 1 times [2020-09-04 23:10:57,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:57,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934104500] [2020-09-04 23:10:57,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:10:57,979 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:10:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:10:57,990 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:10:58,013 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 23:10:58,013 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 23:10:58,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:10:58,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:10:58 BoogieIcfgContainer [2020-09-04 23:10:58,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:10:58,043 INFO L168 Benchmark]: Toolchain (without parser) took 1342.57 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 104.8 MB in the beginning and 141.6 MB in the end (delta: -36.8 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:58,044 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 23:10:58,045 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.69 ms. Allocated memory is still 140.5 MB. Free memory was 104.5 MB in the beginning and 94.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:58,046 INFO L168 Benchmark]: Boogie Preprocessor took 107.80 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 94.7 MB in the beginning and 184.0 MB in the end (delta: -89.3 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:58,047 INFO L168 Benchmark]: RCFGBuilder took 280.42 ms. Allocated memory is still 203.9 MB. Free memory was 184.0 MB in the beginning and 171.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:58,048 INFO L168 Benchmark]: TraceAbstraction took 654.20 ms. Allocated memory is still 203.9 MB. Free memory was 170.5 MB in the beginning and 141.6 MB in the end (delta: 28.9 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. [2020-09-04 23:10:58,053 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.69 ms. Allocated memory is still 140.5 MB. Free memory was 104.5 MB in the beginning and 94.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.80 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 94.7 MB in the beginning and 184.0 MB in the end (delta: -89.3 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 280.42 ms. Allocated memory is still 203.9 MB. Free memory was 184.0 MB in the beginning and 171.1 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 654.20 ms. Allocated memory is still 203.9 MB. Free memory was 170.5 MB in the beginning and 141.6 MB in the end (delta: 28.9 MB). Peak memory consumption was 28.9 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: [L13] int x=__VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=100, x=100] [L14] int y=__VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=1, x=100, y=1] [L16] COND TRUE y>0 VAL [x=100, y=1] [L18] COND FALSE !(x<100) VAL [x=100, y=1] [L23] CALL __VERIFIER_assert(y<=0 || (y<0 && x>=100)) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 8 SDslu, 66 SDs, 0 SdLazy, 14 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 308 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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...