/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:57:58,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:57:58,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:57:58,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:57:58,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:57:58,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:57:58,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:57:58,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:57:58,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:57:58,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:57:58,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:57:58,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:57:58,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:57:58,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:57:58,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:57:58,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:57:58,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:57:58,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:57:58,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:57:58,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:57:58,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:57:58,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:57:58,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:57:58,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:57:58,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 18:57:58,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:57:58,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:57:58,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:57:58,713 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 [2020-08-21 18:57:58,754 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:57:58,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:57:58,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:57:58,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:57:58,756 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:57:58,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:57:58,756 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:57:58,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:57:58,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:57:58,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:57:58,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:57:58,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:57:58,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:57:58,759 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:57:58,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:57:58,760 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:57:58,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:57:58,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:57:58,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:57:58,761 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:57:58,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:57:58,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:57:58,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:57:58,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:57:58,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:57:58,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:57:58,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:57:58,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:57:58,763 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:57:58,763 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=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 18:57:59,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:57:59,128 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:57:59,133 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:57:59,135 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:57:59,136 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:57:59,136 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test09.c [2020-08-21 18:57:59,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff4c9d12a/e7ed84979739428bb69df9928f26f9f5/FLAGb94799979 [2020-08-21 18:57:59,681 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:57:59,681 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test09.c [2020-08-21 18:57:59,689 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff4c9d12a/e7ed84979739428bb69df9928f26f9f5/FLAGb94799979 [2020-08-21 18:58:00,039 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff4c9d12a/e7ed84979739428bb69df9928f26f9f5 [2020-08-21 18:58:00,050 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:58:00,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:58:00,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:58:00,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:58:00,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:58:00,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:58:00" (1/1) ... [2020-08-21 18:58:00,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47a8d835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:58:00, skipping insertion in model container [2020-08-21 18:58:00,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:58:00" (1/1) ... [2020-08-21 18:58:00,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:58:00,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:58:00,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:58:00,287 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:58:00,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:58:00,321 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:58:00,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:58:00 WrapperNode [2020-08-21 18:58:00,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:58:00,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:58:00,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:58:00,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:58:00,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:58:00" (1/1) ... [2020-08-21 18:58:00,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:58:00" (1/1) ... [2020-08-21 18:58:00,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:58:00" (1/1) ... [2020-08-21 18:58:00,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:58:00" (1/1) ... [2020-08-21 18:58:00,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:58:00" (1/1) ... [2020-08-21 18:58:00,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:58:00" (1/1) ... [2020-08-21 18:58:00,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:58:00" (1/1) ... [2020-08-21 18:58:00,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:58:00,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:58:00,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:58:00,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:58:00,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:58:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:58:00,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:58:00,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:58:00,523 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-08-21 18:58:00,523 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:58:00,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:58:00,524 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-08-21 18:58:00,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 18:58:00,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:58:00,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 18:58:00,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:58:00,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 18:58:00,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 18:58:00,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:58:00,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 18:58:00,759 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:58:00,760 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 18:58:00,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:58:00 BoogieIcfgContainer [2020-08-21 18:58:00,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:58:00,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:58:00,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:58:00,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:58:00,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:58:00" (1/3) ... [2020-08-21 18:58:00,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b58135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:58:00, skipping insertion in model container [2020-08-21 18:58:00,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:58:00" (2/3) ... [2020-08-21 18:58:00,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b58135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:58:00, skipping insertion in model container [2020-08-21 18:58:00,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:58:00" (3/3) ... [2020-08-21 18:58:00,771 INFO L109 eAbstractionObserver]: Analyzing ICFG test09.c [2020-08-21 18:58:00,782 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:58:00,788 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:58:00,803 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:58:00,839 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:58:00,840 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:58:00,840 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:58:00,840 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:58:00,840 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:58:00,841 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:58:00,841 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:58:00,841 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:58:00,882 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-21 18:58:00,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 18:58:00,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:58:00,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:58:00,890 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:58:00,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:58:00,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1889415219, now seen corresponding path program 1 times [2020-08-21 18:58:00,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:58:00,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447799462] [2020-08-21 18:58:00,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:58:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:58:01,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:58:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:58:01,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:58:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:58:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:58:01,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447799462] [2020-08-21 18:58:01,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:58:01,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 18:58:01,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424323037] [2020-08-21 18:58:01,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:58:01,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:58:01,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:58:01,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:58:01,272 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 6 states. [2020-08-21 18:58:01,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:58:01,467 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-08-21 18:58:01,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 18:58:01,470 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-21 18:58:01,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:58:01,481 INFO L225 Difference]: With dead ends: 33 [2020-08-21 18:58:01,481 INFO L226 Difference]: Without dead ends: 15 [2020-08-21 18:58:01,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:58:01,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-21 18:58:01,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-21 18:58:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-21 18:58:01,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-08-21 18:58:01,530 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 14 [2020-08-21 18:58:01,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:58:01,531 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-08-21 18:58:01,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:58:01,532 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-08-21 18:58:01,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 18:58:01,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:58:01,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:58:01,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:58:01,534 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:58:01,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:58:01,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1918044370, now seen corresponding path program 1 times [2020-08-21 18:58:01,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:58:01,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737273402] [2020-08-21 18:58:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:58:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:58:01,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:58:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:58:01,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 18:58:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:58:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:58:01,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737273402] [2020-08-21 18:58:01,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:58:01,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 18:58:01,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325361762] [2020-08-21 18:58:01,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:58:01,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:58:01,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:58:01,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:58:01,841 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 8 states. [2020-08-21 18:58:02,153 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-08-21 18:58:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:58:02,159 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2020-08-21 18:58:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:58:02,160 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-08-21 18:58:02,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:58:02,160 INFO L225 Difference]: With dead ends: 15 [2020-08-21 18:58:02,161 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 18:58:02,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:58:02,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 18:58:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 18:58:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 18:58:02,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 18:58:02,163 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-08-21 18:58:02,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:58:02,164 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 18:58:02,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:58:02,164 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 18:58:02,164 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 18:58:02,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:58:02,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 18:58:02,385 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:58:02,385 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~p2~0.base |old(~p2~0.base)|) (= |~#b~0.offset| |old(~#b~0.offset)|) (= |old(#length)| |#length|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= ~p2~0.offset |old(~p2~0.offset)|) (= |~#b~0.base| |old(~#b~0.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~p1~0.offset |old(~p1~0.offset)|) (= ~p1~0.base |old(~p1~0.base)|) (= |~#a~0.base| |old(~#a~0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-21 18:58:02,385 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:58:02,386 INFO L268 CegarLoopResult]: For program point L9(lines 9 14) no Hoare annotation was computed. [2020-08-21 18:58:02,386 INFO L268 CegarLoopResult]: For program point fEXIT(lines 7 15) no Hoare annotation was computed. [2020-08-21 18:58:02,386 INFO L264 CegarLoopResult]: At program point fENTRY(lines 7 15) the Hoare annotation is: (or (not (= |old(~p1~0.offset)| |~#a~0.offset|)) (not (= (select (select |#memory_int| ~p2~0.base) ~p2~0.offset) 1)) (and (= ~p1~0.offset |~#a~0.offset|) (= |old(~p1~0.base)| ~p1~0.base)) (not (= |old(~p1~0.base)| |~#a~0.base|)) (= |~#b~0.base| |~#a~0.base|)) [2020-08-21 18:58:02,386 INFO L268 CegarLoopResult]: For program point fFINAL(lines 7 15) no Hoare annotation was computed. [2020-08-21 18:58:02,387 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:58:02,387 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (= ~p2~0.base ~p1~0.base) (= ~p2~0.offset ~p1~0.offset) (not (= |~#b~0.base| |~#a~0.base|))) [2020-08-21 18:58:02,387 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 18:58:02,387 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:58:02,387 INFO L264 CegarLoopResult]: At program point L32(lines 17 39) the Hoare annotation is: (or (not (= |old(~p2~0.offset)| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |old(~p2~0.base)|)) (= |~#a~0.base| |~#b~0.base|)) [2020-08-21 18:58:02,388 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 37) no Hoare annotation was computed. [2020-08-21 18:58:02,388 INFO L268 CegarLoopResult]: For program point L31(lines 31 33) no Hoare annotation was computed. [2020-08-21 18:58:02,388 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 17 39) the Hoare annotation is: (or (not (= |old(~p2~0.offset)| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |old(~p2~0.base)|)) (and (= |old(~p1~0.offset)| ~p1~0.offset) (= ~p2~0.base ~p1~0.base) (= |old(~p1~0.base)| ~p1~0.base) (= ~p2~0.offset ~p1~0.offset)) (= |~#b~0.base| |~#a~0.base|)) [2020-08-21 18:58:02,388 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 39) no Hoare annotation was computed. [2020-08-21 18:58:02,389 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (or (not (= |old(~p2~0.offset)| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |old(~p2~0.base)|)) (and (= |~#a~0.base| ~p1~0.base) (= ~p1~0.offset |~#a~0.offset|) (= (select (select |#memory_int| ~p2~0.base) ~p2~0.offset) 1)) (= |~#b~0.base| |~#a~0.base|)) [2020-08-21 18:58:02,389 INFO L268 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-08-21 18:58:02,389 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 39) no Hoare annotation was computed. [2020-08-21 18:58:02,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:58:02 BoogieIcfgContainer [2020-08-21 18:58:02,410 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:58:02,412 INFO L168 Benchmark]: Toolchain (without parser) took 2360.14 ms. Allocated memory was 137.4 MB in the beginning and 230.2 MB in the end (delta: 92.8 MB). Free memory was 101.1 MB in the beginning and 136.5 MB in the end (delta: -35.4 MB). Peak memory consumption was 57.4 MB. Max. memory is 7.1 GB. [2020-08-21 18:58:02,414 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 18:58:02,414 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.31 ms. Allocated memory is still 137.4 MB. Free memory was 100.6 MB in the beginning and 90.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:58:02,416 INFO L168 Benchmark]: Boogie Preprocessor took 138.40 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 90.5 MB in the beginning and 178.8 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:58:02,417 INFO L168 Benchmark]: RCFGBuilder took 302.00 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 164.0 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-08-21 18:58:02,418 INFO L168 Benchmark]: TraceAbstraction took 1645.31 ms. Allocated memory was 200.8 MB in the beginning and 230.2 MB in the end (delta: 29.4 MB). Free memory was 163.3 MB in the beginning and 136.5 MB in the end (delta: 26.8 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2020-08-21 18:58:02,422 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 269.31 ms. Allocated memory is still 137.4 MB. Free memory was 100.6 MB in the beginning and 90.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.40 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 90.5 MB in the beginning and 178.8 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 302.00 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 164.0 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1645.31 ms. Allocated memory was 200.8 MB in the beginning and 230.2 MB in the end (delta: 29.4 MB). Free memory was 163.3 MB in the beginning and 136.5 MB in the end (delta: 26.8 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 37]: 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: 17]: Loop Invariant Derived loop invariant: (!(\old(p2) == \old(p1)) || !(\old(p1) == \old(p2))) || a == b - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 13 SDslu, 36 SDs, 0 SdLazy, 67 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 7 PreInvPairs, 7 NumberOfFragments, 139 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 85 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 2990 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...