/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.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:28:44,745 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 01:28:44,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:28:44,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:28:44,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:28:44,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:28:44,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:28:44,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:28:44,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:28:44,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:28:44,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:28:44,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:28:44,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:28:44,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:28:44,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:28:44,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:28:44,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:28:44,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:28:44,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 01:28:44,859 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:28:44,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:28:44,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:28:44,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:28:44,863 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:28:44,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:28:44,864 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:28:44,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:28:44,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:28:44,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:28:44,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:28:44,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:28:44,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:28:44,865 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:28:44,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:28:44,865 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:28:44,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:28:44,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:28:44,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:28:44,866 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:28:44,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:28:44,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:28:44,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:28:44,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:28:44,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:28:44,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:28:44,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:28:44,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:28:44,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:28:44,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:28:45,172 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:28:45,193 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:28:45,196 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:28:45,197 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:28:45,198 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:28:45,199 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test07.c [2020-07-20 01:28:45,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd53f8110/73e55291fad74b458e34f128731f2fc1/FLAG449057188 [2020-07-20 01:28:45,753 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:28:45,753 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test07.c [2020-07-20 01:28:45,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd53f8110/73e55291fad74b458e34f128731f2fc1/FLAG449057188 [2020-07-20 01:28:46,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd53f8110/73e55291fad74b458e34f128731f2fc1 [2020-07-20 01:28:46,105 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:28:46,108 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:28:46,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:28:46,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:28:46,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:28:46,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:28:46" (1/1) ... [2020-07-20 01:28:46,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb4131c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:46, skipping insertion in model container [2020-07-20 01:28:46,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:28:46" (1/1) ... [2020-07-20 01:28:46,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:28:46,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:28:46,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:28:46,362 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:28:46,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:28:46,395 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:28:46,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:46 WrapperNode [2020-07-20 01:28:46,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:28:46,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:28:46,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:28:46,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:28:46,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:46" (1/1) ... [2020-07-20 01:28:46,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:46" (1/1) ... [2020-07-20 01:28:46,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:46" (1/1) ... [2020-07-20 01:28:46,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:46" (1/1) ... [2020-07-20 01:28:46,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:46" (1/1) ... [2020-07-20 01:28:46,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:46" (1/1) ... [2020-07-20 01:28:46,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:46" (1/1) ... [2020-07-20 01:28:46,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:28:46,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:28:46,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:28:46,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:28:46,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-20 01:28:46,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:28:46,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:28:46,574 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-20 01:28:46,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:28:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:28:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-20 01:28:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 01:28:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:28:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 01:28:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:28:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 01:28:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 01:28:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:28:46,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 01:28:46,779 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:28:46,780 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 01:28:46,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:28:46 BoogieIcfgContainer [2020-07-20 01:28:46,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:28:46,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:28:46,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:28:46,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:28:46,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:28:46" (1/3) ... [2020-07-20 01:28:46,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ae0d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:28:46, skipping insertion in model container [2020-07-20 01:28:46,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:28:46" (2/3) ... [2020-07-20 01:28:46,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ae0d13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:28:46, skipping insertion in model container [2020-07-20 01:28:46,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:28:46" (3/3) ... [2020-07-20 01:28:46,796 INFO L109 eAbstractionObserver]: Analyzing ICFG test07.c [2020-07-20 01:28:46,812 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:28:46,819 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:28:46,837 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:28:46,865 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:28:46,865 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:28:46,865 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:28:46,865 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:28:46,865 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:28:46,865 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:28:46,866 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:28:46,866 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:28:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 01:28:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 01:28:46,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:46,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:46,893 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:46,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:46,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1889415219, now seen corresponding path program 1 times [2020-07-20 01:28:46,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:46,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045956650] [2020-07-20 01:28:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b74a6c7 [2020-07-20 01:28:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:28:47,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045956650] [2020-07-20 01:28:47,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:47,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 01:28:47,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148088527] [2020-07-20 01:28:47,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 01:28:47,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:47,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 01:28:47,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:28:47,359 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2020-07-20 01:28:47,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:47,490 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-07-20 01:28:47,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:28:47,493 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-07-20 01:28:47,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:47,503 INFO L225 Difference]: With dead ends: 29 [2020-07-20 01:28:47,503 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 01:28:47,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:28:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 01:28:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 01:28:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 01:28:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-07-20 01:28:47,550 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 14 [2020-07-20 01:28:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:47,551 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-07-20 01:28:47,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 01:28:47,551 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-07-20 01:28:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 01:28:47,552 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:28:47,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:28:47,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:28:47,553 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:28:47,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:28:47,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1918044370, now seen corresponding path program 1 times [2020-07-20 01:28:47,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:28:47,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615933041] [2020-07-20 01:28:47,554 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b74a6c7 [2020-07-20 01:28:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:28:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:28:47,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615933041] [2020-07-20 01:28:47,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:28:47,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 01:28:47,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281817275] [2020-07-20 01:28:47,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:28:47,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:28:47,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:28:47,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:28:47,875 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 8 states. [2020-07-20 01:28:48,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:28:48,156 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2020-07-20 01:28:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:28:48,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-07-20 01:28:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:28:48,157 INFO L225 Difference]: With dead ends: 15 [2020-07-20 01:28:48,157 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 01:28:48,159 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 [2020-07-20 01:28:48,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 01:28:48,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 01:28:48,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 01:28:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 01:28:48,160 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-07-20 01:28:48,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:28:48,161 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 01:28:48,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:28:48,161 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 01:28:48,161 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 01:28:48,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:28:48,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 01:28:48,329 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 01:28:48,330 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |~#a~0.base| |old(~#a~0.base)|) (= |~#b~0.base| |old(~#b~0.base)|) (= |#valid| |old(#valid)|) (= |~#b~0.offset| |old(~#b~0.offset)|) (= ~p2~0.offset |old(~p2~0.offset)|) (= |#NULL.base| |old(#NULL.base)|) (= ~p2~0.base |old(~p2~0.base)|) (= ~p1~0.offset |old(~p1~0.offset)|) (= ~p1~0.base |old(~p1~0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= |old(#length)| |#length|)) [2020-07-20 01:28:48,330 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:28:48,330 INFO L268 CegarLoopResult]: For program point L9(lines 9 14) no Hoare annotation was computed. [2020-07-20 01:28:48,330 INFO L268 CegarLoopResult]: For program point fEXIT(lines 7 15) no Hoare annotation was computed. [2020-07-20 01:28:48,330 INFO L264 CegarLoopResult]: At program point fENTRY(lines 7 15) the Hoare annotation is: (or (not (= 1 (select (select |#memory_int| ~p2~0.base) ~p2~0.offset))) (= |~#b~0.base| |~#a~0.base|) (not (= |old(~p1~0.base)| |~#a~0.base|)) (and (= |old(~p1~0.offset)| ~p1~0.offset) (= |~#a~0.base| ~p1~0.base)) (not (= |old(~p1~0.offset)| |~#a~0.offset|))) [2020-07-20 01:28:48,331 INFO L268 CegarLoopResult]: For program point fFINAL(lines 7 15) no Hoare annotation was computed. [2020-07-20 01:28:48,331 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:28:48,331 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (not (= |~#b~0.base| |~#a~0.base|)) [2020-07-20 01:28:48,331 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 01:28:48,331 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 01:28:48,332 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2020-07-20 01:28:48,332 INFO L264 CegarLoopResult]: At program point L30(lines 17 37) the Hoare annotation is: (= |~#a~0.base| |~#b~0.base|) [2020-07-20 01:28:48,332 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 17 37) the Hoare annotation is: (or (and (= |old(~p2~0.offset)| ~p2~0.offset) (= |old(~p1~0.offset)| ~p1~0.offset) (= |old(~p1~0.base)| ~p1~0.base) (= ~p2~0.base |old(~p2~0.base)|)) (= |~#b~0.base| |~#a~0.base|)) [2020-07-20 01:28:48,332 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-07-20 01:28:48,333 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 37) no Hoare annotation was computed. [2020-07-20 01:28:48,333 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (or (= |~#b~0.base| |~#a~0.base|) (and (= 1 (select (select |#memory_int| ~p2~0.base) ~p2~0.offset)) (= ~p1~0.offset |~#a~0.offset|) (= |~#a~0.base| ~p1~0.base))) [2020-07-20 01:28:48,333 INFO L268 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-07-20 01:28:48,333 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 37) no Hoare annotation was computed. [2020-07-20 01:28:48,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:28:48 BoogieIcfgContainer [2020-07-20 01:28:48,356 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:28:48,361 INFO L168 Benchmark]: Toolchain (without parser) took 2251.26 ms. Allocated memory was 144.7 MB in the beginning and 234.4 MB in the end (delta: 89.7 MB). Free memory was 102.0 MB in the beginning and 145.7 MB in the end (delta: -43.6 MB). Peak memory consumption was 46.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:28:48,371 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 01:28:48,372 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.49 ms. Allocated memory is still 144.7 MB. Free memory was 101.8 MB in the beginning and 91.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:28:48,375 INFO L168 Benchmark]: Boogie Preprocessor took 117.72 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 91.5 MB in the beginning and 180.5 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:28:48,377 INFO L168 Benchmark]: RCFGBuilder took 269.37 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 164.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2020-07-20 01:28:48,380 INFO L168 Benchmark]: TraceAbstraction took 1570.81 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 164.8 MB in the beginning and 145.7 MB in the end (delta: 19.2 MB). Peak memory consumption was 51.7 MB. Max. memory is 7.1 GB. [2020-07-20 01:28:48,392 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.49 ms. Allocated memory is still 144.7 MB. Free memory was 101.8 MB in the beginning and 91.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.72 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 91.5 MB in the beginning and 180.5 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 269.37 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 164.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1570.81 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 164.8 MB in the beginning and 145.7 MB in the end (delta: 19.2 MB). Peak memory consumption was 51.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 35]: 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: 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: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 6 SDslu, 48 SDs, 0 SdLazy, 80 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 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, 107 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 79 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 3224 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...