/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=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:02:03,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:02:03,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:02:03,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:02:03,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:02:03,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:02:03,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:02:03,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:02:03,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:02:03,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:02:03,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:02:03,391 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:02:03,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:02:03,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:02:03,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:02:03,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:02:03,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:02:03,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:02:03,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:02:03,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:02:03,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:02:03,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:02:03,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:02:03,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:02:03,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:02:03,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:02:03,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:02:03,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:02:03,426 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 [2020-08-18 18:02:03,471 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:02:03,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:02:03,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:02:03,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:02:03,473 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:02:03,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:02:03,474 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:02:03,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:02:03,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:02:03,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:02:03,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:02:03,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:02:03,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:02:03,476 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:02:03,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:02:03,476 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:02:03,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:02:03,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:02:03,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:02:03,477 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:02:03,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:02:03,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:02:03,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:02:03,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:02:03,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:02:03,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:02:03,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:02:03,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:02:03,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:02:03,480 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 18:02:03,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:02:03,809 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:02:03,813 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:02:03,814 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:02:03,815 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:02:03,816 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-08-18 18:02:03,874 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/179ae553a/99a506add1184c38bbf14b8c17fe997e/FLAGfe2ff843e [2020-08-18 18:02:04,280 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:02:04,282 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-08-18 18:02:04,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/179ae553a/99a506add1184c38bbf14b8c17fe997e/FLAGfe2ff843e [2020-08-18 18:02:04,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/179ae553a/99a506add1184c38bbf14b8c17fe997e [2020-08-18 18:02:04,665 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:02:04,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:02:04,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:02:04,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:02:04,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:02:04,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:02:04" (1/1) ... [2020-08-18 18:02:04,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56344ce7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:04, skipping insertion in model container [2020-08-18 18:02:04,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:02:04" (1/1) ... [2020-08-18 18:02:04,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:02:04,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:02:04,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:02:04,866 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:02:04,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:02:04,896 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:02:04,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:04 WrapperNode [2020-08-18 18:02:04,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:02:04,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:02:04,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:02:04,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:02:04,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:04" (1/1) ... [2020-08-18 18:02:04,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:04" (1/1) ... [2020-08-18 18:02:04,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:04" (1/1) ... [2020-08-18 18:02:04,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:04" (1/1) ... [2020-08-18 18:02:04,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:04" (1/1) ... [2020-08-18 18:02:04,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:04" (1/1) ... [2020-08-18 18:02:04,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:04" (1/1) ... [2020-08-18 18:02:04,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:02:04,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:02:04,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:02:04,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:02:04,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:04" (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 [2020-08-18 18:02:05,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:02:05,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:02:05,065 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 18:02:05,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:02:05,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:02:05,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 18:02:05,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:02:05,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:02:05,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:02:05,245 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:02:05,245 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 18:02:05,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:02:05 BoogieIcfgContainer [2020-08-18 18:02:05,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:02:05,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:02:05,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:02:05,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:02:05,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:02:04" (1/3) ... [2020-08-18 18:02:05,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c58585a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:02:05, skipping insertion in model container [2020-08-18 18:02:05,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:02:04" (2/3) ... [2020-08-18 18:02:05,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c58585a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:02:05, skipping insertion in model container [2020-08-18 18:02:05,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:02:05" (3/3) ... [2020-08-18 18:02:05,269 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_12.c [2020-08-18 18:02:05,302 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:02:05,321 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:02:05,352 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:02:05,376 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:02:05,377 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:02:05,377 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:02:05,377 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:02:05,377 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:02:05,377 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:02:05,378 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:02:05,378 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:02:05,395 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-18 18:02:05,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 18:02:05,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:05,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:02:05,402 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:05,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:05,407 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2020-08-18 18:02:05,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:05,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137434735] [2020-08-18 18:02:05,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:05,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:05,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137434735] [2020-08-18 18:02:05,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:05,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 18:02:05,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897856164] [2020-08-18 18:02:05,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 18:02:05,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:05,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 18:02:05,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 18:02:05,549 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-18 18:02:05,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:05,571 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-18 18:02:05,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 18:02:05,573 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-18 18:02:05,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:05,581 INFO L225 Difference]: With dead ends: 32 [2020-08-18 18:02:05,581 INFO L226 Difference]: Without dead ends: 13 [2020-08-18 18:02:05,584 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 [2020-08-18 18:02:05,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-18 18:02:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-18 18:02:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-18 18:02:05,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-08-18 18:02:05,622 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-08-18 18:02:05,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:05,622 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-08-18 18:02:05,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 18:02:05,622 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-08-18 18:02:05,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 18:02:05,623 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:02:05,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:02:05,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:02:05,624 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:02:05,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:02:05,625 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2020-08-18 18:02:05,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:02:05,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786331655] [2020-08-18 18:02:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:02:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:05,889 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2020-08-18 18:02:05,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:02:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:02:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:02:05,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786331655] [2020-08-18 18:02:05,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:02:05,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:02:05,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691976532] [2020-08-18 18:02:05,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:02:05,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:02:05,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:02:05,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:02:05,924 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-08-18 18:02:05,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:02:05,961 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-08-18 18:02:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:02:05,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-18 18:02:05,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:02:05,963 INFO L225 Difference]: With dead ends: 13 [2020-08-18 18:02:05,963 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:02:05,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:02:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:02:05,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:02:05,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:02:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:02:05,965 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-08-18 18:02:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:02:05,966 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:02:05,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:02:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:02:05,966 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:02:05,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:02:05,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:02:06,007 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 18:02:06,008 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:02:06,008 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:02:06,008 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 18:02:06,008 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 18:02:06,009 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:02:06,009 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 15) the Hoare annotation is: true [2020-08-18 18:02:06,009 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 15) no Hoare annotation was computed. [2020-08-18 18:02:06,009 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-08-18 18:02:06,010 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 15) no Hoare annotation was computed. [2020-08-18 18:02:06,010 INFO L268 CegarLoopResult]: For program point L9(lines 9 10) no Hoare annotation was computed. [2020-08-18 18:02:06,010 INFO L268 CegarLoopResult]: For program point L9-2(lines 9 10) no Hoare annotation was computed. [2020-08-18 18:02:06,010 INFO L264 CegarLoopResult]: At program point L8-2(lines 8 12) the Hoare annotation is: (and (<= main_~z~0 (let ((.cse0 (div main_~z~0 2))) (+ (* 2 .cse0) (* 4294967296 (div (+ main_~z~0 (* .cse0 (- 2))) 4294967296))))) (<= 0 main_~z~0)) [2020-08-18 18:02:06,011 INFO L264 CegarLoopResult]: At program point L8-3(lines 8 12) the Hoare annotation is: (and (<= main_~z~0 (let ((.cse0 (div main_~z~0 2))) (+ (* 2 .cse0) (* 4294967296 (div (+ main_~z~0 (* .cse0 (- 2))) 4294967296))))) (<= 0 main_~z~0)) [2020-08-18 18:02:06,011 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-18 18:02:06,011 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-18 18:02:06,011 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-18 18:02:06,012 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-18 18:02:06,012 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-18 18:02:06,012 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-18 18:02:06,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:02:06 BoogieIcfgContainer [2020-08-18 18:02:06,030 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:02:06,032 INFO L168 Benchmark]: Toolchain (without parser) took 1365.41 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 101.6 MB in the beginning and 127.9 MB in the end (delta: -26.3 MB). Peak memory consumption was 36.1 MB. Max. memory is 7.1 GB. [2020-08-18 18:02:06,033 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 18:02:06,034 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.89 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 92.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-18 18:02:06,036 INFO L168 Benchmark]: Boogie Preprocessor took 96.78 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 179.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-18 18:02:06,037 INFO L168 Benchmark]: RCFGBuilder took 257.27 ms. Allocated memory is still 200.8 MB. Free memory was 179.8 MB in the beginning and 167.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-18 18:02:06,038 INFO L168 Benchmark]: TraceAbstraction took 776.55 ms. Allocated memory is still 200.8 MB. Free memory was 166.9 MB in the beginning and 127.9 MB in the end (delta: 39.0 MB). Peak memory consumption was 39.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:02:06,042 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 229.89 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 92.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 96.78 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 179.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 257.27 ms. Allocated memory is still 200.8 MB. Free memory was 179.8 MB in the beginning and 167.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 776.55 ms. Allocated memory is still 200.8 MB. Free memory was 166.9 MB in the beginning and 127.9 MB in the end (delta: 39.0 MB). Peak memory consumption was 39.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: 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: 8]: Loop Invariant Derived loop invariant: z <= 2 * (z / 2) + 4294967296 * ((z + z / 2 * -2) / 4294967296) && 0 <= z - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 4 SDslu, 24 SDs, 0 SdLazy, 5 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 8 PreInvPairs, 9 NumberOfFragments, 51 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 612 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 correct! Received shutdown request...