/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:44:10,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:44:10,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:44:10,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:44:10,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:44:10,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:44:10,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:44:10,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:44:10,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:44:10,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:44:10,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:44:10,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:44:10,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:44:10,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:44:10,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:44:10,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:44:10,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:44:10,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:44:10,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:44:10,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:44:10,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:44:10,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:44:10,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:44:10,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:44:10,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:44:10,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:44:10,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:44:10,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:44:10,869 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 [2020-08-22 16:44:10,891 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:44:10,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:44:10,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:44:10,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:44:10,893 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:44:10,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:44:10,894 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:44:10,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:44:10,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:44:10,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:44:10,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:44:10,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:44:10,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:44:10,895 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:44:10,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:44:10,896 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:44:10,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:44:10,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:44:10,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:44:10,896 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:44:10,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:44:10,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:44:10,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:44:10,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:44:10,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:44:10,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:44:10,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:44:10,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:44:10,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:44:10,898 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:44:11,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:44:11,249 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:44:11,254 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:44:11,256 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:44:11,256 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:44:11,257 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2020-08-22 16:44:11,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc67e486a/eeec8102c60c403597c0ffcde32fe9b4/FLAGf995707b4 [2020-08-22 16:44:11,814 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:44:11,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c [2020-08-22 16:44:11,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc67e486a/eeec8102c60c403597c0ffcde32fe9b4/FLAGf995707b4 [2020-08-22 16:44:12,190 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc67e486a/eeec8102c60c403597c0ffcde32fe9b4 [2020-08-22 16:44:12,199 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:44:12,201 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:44:12,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:44:12,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:44:12,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:44:12,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:44:12" (1/1) ... [2020-08-22 16:44:12,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aed4350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:44:12, skipping insertion in model container [2020-08-22 16:44:12,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:44:12" (1/1) ... [2020-08-22 16:44:12,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:44:12,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:44:12,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:44:12,479 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:44:12,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:44:12,512 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:44:12,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:44:12 WrapperNode [2020-08-22 16:44:12,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:44:12,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:44:12,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:44:12,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:44:12,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:44:12" (1/1) ... [2020-08-22 16:44:12,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:44:12" (1/1) ... [2020-08-22 16:44:12,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:44:12" (1/1) ... [2020-08-22 16:44:12,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:44:12" (1/1) ... [2020-08-22 16:44:12,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:44:12" (1/1) ... [2020-08-22 16:44:12,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:44:12" (1/1) ... [2020-08-22 16:44:12,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:44:12" (1/1) ... [2020-08-22 16:44:12,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:44:12,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:44:12,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:44:12,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:44:12,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:44:12" (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 [2020-08-22 16:44:12,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:44:12,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:44:12,710 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-08-22 16:44:12,710 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-08-22 16:44:12,711 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:44:12,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:44:12,711 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-08-22 16:44:12,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 16:44:12,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 16:44:12,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:44:12,711 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-08-22 16:44:12,712 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:44:12,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 16:44:12,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:44:12,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:44:12,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:44:12,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:44:13,116 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:44:13,116 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 16:44:13,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:44:13 BoogieIcfgContainer [2020-08-22 16:44:13,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:44:13,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:44:13,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:44:13,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:44:13,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:44:12" (1/3) ... [2020-08-22 16:44:13,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634e3d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:44:13, skipping insertion in model container [2020-08-22 16:44:13,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:44:12" (2/3) ... [2020-08-22 16:44:13,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634e3d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:44:13, skipping insertion in model container [2020-08-22 16:44:13,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:44:13" (3/3) ... [2020-08-22 16:44:13,142 INFO L109 eAbstractionObserver]: Analyzing ICFG test06.c [2020-08-22 16:44:13,150 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:44:13,158 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:44:13,172 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:44:13,198 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:44:13,198 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:44:13,198 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:44:13,199 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:44:13,199 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:44:13,199 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:44:13,199 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:44:13,200 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:44:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-22 16:44:13,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 16:44:13,225 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:44:13,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:44:13,226 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:44:13,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:44:13,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1199829752, now seen corresponding path program 1 times [2020-08-22 16:44:13,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:44:13,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138583813] [2020-08-22 16:44:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:44:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:44:13,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:44:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:44:13,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 16:44:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:44:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:44:13,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138583813] [2020-08-22 16:44:13,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:44:13,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 16:44:13,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874377898] [2020-08-22 16:44:13,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:44:13,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:44:13,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:44:13,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:44:13,628 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 7 states. [2020-08-22 16:44:13,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:44:13,900 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 16:44:13,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:44:13,902 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-08-22 16:44:13,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:44:13,912 INFO L225 Difference]: With dead ends: 34 [2020-08-22 16:44:13,912 INFO L226 Difference]: Without dead ends: 20 [2020-08-22 16:44:13,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:44:13,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-08-22 16:44:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-08-22 16:44:13,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-22 16:44:13,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2020-08-22 16:44:13,956 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 14 [2020-08-22 16:44:13,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:44:13,957 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2020-08-22 16:44:13,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:44:13,957 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2020-08-22 16:44:13,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 16:44:13,958 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:44:13,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:44:13,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:44:13,959 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:44:13,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:44:13,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2114164890, now seen corresponding path program 1 times [2020-08-22 16:44:13,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:44:13,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865686313] [2020-08-22 16:44:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:44:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:44:14,073 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:44:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:44:14,139 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:44:14,172 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:44:14,173 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:44:14,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:44:14,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:44:14 BoogieIcfgContainer [2020-08-22 16:44:14,212 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:44:14,215 INFO L168 Benchmark]: Toolchain (without parser) took 2013.65 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.9 MB in the beginning and 95.7 MB in the end (delta: 8.2 MB). Peak memory consumption was 71.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:44:14,216 INFO L168 Benchmark]: CDTParser took 1.48 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 16:44:14,217 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.11 ms. Allocated memory is still 141.0 MB. Free memory was 103.7 MB in the beginning and 93.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:44:14,218 INFO L168 Benchmark]: Boogie Preprocessor took 133.04 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.7 MB in the beginning and 182.0 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-22 16:44:14,219 INFO L168 Benchmark]: RCFGBuilder took 482.19 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 162.2 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-08-22 16:44:14,220 INFO L168 Benchmark]: TraceAbstraction took 1080.85 ms. Allocated memory is still 203.9 MB. Free memory was 161.6 MB in the beginning and 96.4 MB in the end (delta: 65.2 MB). Peak memory consumption was 65.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:44:14,225 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.48 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 311.11 ms. Allocated memory is still 141.0 MB. Free memory was 103.7 MB in the beginning and 93.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.04 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.7 MB in the beginning and 182.0 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 482.19 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 162.2 MB in the end (delta: 19.8 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1080.85 ms. Allocated memory is still 203.9 MB. Free memory was 161.6 MB in the beginning and 96.4 MB in the end (delta: 65.2 MB). Peak memory consumption was 65.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 40]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int a, b; [L22] int *p1, *p2; [L24] p1 = &a [L25] p2 = &b [L27] b = 1 [L28] a = 5 [L30] EXPR \read(a) [L30] a-- [L32] EXPR \read(a) VAL [\read(a)=4, a={2:0}, b={5:0}, p1={3:0}, p2={6:0}] [L32] CALL, EXPR f(a, &p1, &p2) VAL [\old(a)=4, p1={3:0}, p2={6:0}] [L12] COND TRUE a == 4 VAL [\old(a)=4, a=4, p1={3:0}, p1={3:0}, p2={6:0}, p2={6:0}] [L13] CALL g(p1, p2) VAL [p1={3:0}, p2={6:0}] [L5] EXPR \read(**p2) [L5] int *pq = *p2; [L7] EXPR \read(**p2) [L7] *p1 = *p2 [L8] *pq = 0 VAL [p1={3:0}, p1={3:0}, p2={6:0}, p2={6:0}, pq={5:0}] [L13] RET g(p1, p2) VAL [\old(a)=4, a=4, p1={3:0}, p1={3:0}, p2={6:0}, p2={6:0}] [L14] return 1; VAL [\old(a)=4, \result=1, a=4, p1={3:0}, p1={3:0}, p2={6:0}, p2={6:0}] [L32] RET, EXPR f(a, &p1, &p2) VAL [\read(a)=4, a={2:0}, b={5:0}, f(a, &p1, &p2)=1, p1={3:0}, p2={6:0}] [L32] a = f(a, &p1, &p2) [L34] EXPR \read(*p1) VAL [\read(*p1)={5:0}, \read(*p1)=0, a={2:0}, b={5:0}, p1={3:0}, p2={6:0}] [L34] COND TRUE *p1 == 0 [L40] __VERIFIER_error() VAL [a={2:0}, b={5:0}, p1={3:0}, p2={6:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 17 SDslu, 42 SDs, 0 SdLazy, 55 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 533 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...