/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/test07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:28:46,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:28:46,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:28:46,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:28:46,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:28:46,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:28:46,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:28:46,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:28:46,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:28:46,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:28:46,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:28:46,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-11-06 22:28:46,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:28:46,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:28:46,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:28:46,726 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 [2020-11-06 22:28:46,753 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:28:46,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:28:46,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:28:46,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:28:46,755 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:28:46,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:28:46,755 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:28:46,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:28:46,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:28:46,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:28:46,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:28:46,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:28:46,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:28:46,757 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:28:46,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:28:46,757 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:28:46,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:28:46,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:28:46,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:28:46,758 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:28:46,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:28:46,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:28:46,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:28:46,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:28:46,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:28:46,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:28:46,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:28:46,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:28:46,760 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:28:46,760 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:28:47,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:28:47,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:28:47,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:28:47,140 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:28:47,141 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:28:47,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test07.c [2020-11-06 22:28:47,227 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6455aded/9fab6c60604540f6a45c0b755049aaee/FLAG567181899 [2020-11-06 22:28:47,822 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:28:47,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test07.c [2020-11-06 22:28:47,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6455aded/9fab6c60604540f6a45c0b755049aaee/FLAG567181899 [2020-11-06 22:28:48,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6455aded/9fab6c60604540f6a45c0b755049aaee [2020-11-06 22:28:48,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:28:48,227 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:28:48,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:28:48,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:28:48,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:28:48,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:28:48" (1/1) ... [2020-11-06 22:28:48,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff699de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:48, skipping insertion in model container [2020-11-06 22:28:48,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:28:48" (1/1) ... [2020-11-06 22:28:48,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:28:48,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:28:48,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:28:48,424 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:28:48,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:28:48,458 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:28:48,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:48 WrapperNode [2020-11-06 22:28:48,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:28:48,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:28:48,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:28:48,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:28:48,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:48" (1/1) ... [2020-11-06 22:28:48,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:48" (1/1) ... [2020-11-06 22:28:48,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:48" (1/1) ... [2020-11-06 22:28:48,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:48" (1/1) ... [2020-11-06 22:28:48,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:48" (1/1) ... [2020-11-06 22:28:48,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:48" (1/1) ... [2020-11-06 22:28:48,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:48" (1/1) ... [2020-11-06 22:28:48,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:28:48,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:28:48,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:28:48,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:28:48,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:48" (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 [2020-11-06 22:28:48,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:28:48,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:28:48,573 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:28:48,573 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-11-06 22:28:48,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:28:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:28:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:28:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:28:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:28:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-11-06 22:28:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:28:48,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:28:48,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:28:48,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:28:48,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:28:48,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:28:48,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:28:48,908 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:28:48,908 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:28:48,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:28:48 BoogieIcfgContainer [2020-11-06 22:28:48,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:28:48,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:28:48,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:28:48,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:28:48,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:28:48" (1/3) ... [2020-11-06 22:28:48,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c370fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:28:48, skipping insertion in model container [2020-11-06 22:28:48,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:48" (2/3) ... [2020-11-06 22:28:48,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c370fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:28:48, skipping insertion in model container [2020-11-06 22:28:48,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:28:48" (3/3) ... [2020-11-06 22:28:48,919 INFO L111 eAbstractionObserver]: Analyzing ICFG test07.c [2020-11-06 22:28:48,935 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:28:48,938 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:28:48,953 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:28:48,991 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:28:48,994 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:28:48,994 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:28:48,994 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:28:48,994 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:28:48,995 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:28:48,995 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:28:48,995 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:28:49,047 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-11-06 22:28:49,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:28:49,059 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:49,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:28:49,064 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:49,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1827250340, now seen corresponding path program 1 times [2020-11-06 22:28:49,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:49,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434150330] [2020-11-06 22:28:49,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:49,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:49,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:28:49,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434150330] [2020-11-06 22:28:49,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:28:49,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 22:28:49,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973493851] [2020-11-06 22:28:49,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:28:49,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:49,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:28:49,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:28:49,762 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 7 states. [2020-11-06 22:28:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:49,930 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-11-06 22:28:49,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:28:49,932 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-06 22:28:49,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:49,941 INFO L225 Difference]: With dead ends: 34 [2020-11-06 22:28:49,942 INFO L226 Difference]: Without dead ends: 16 [2020-11-06 22:28:49,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:28:49,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-06 22:28:49,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-06 22:28:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-06 22:28:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2020-11-06 22:28:49,985 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 15 [2020-11-06 22:28:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:49,985 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2020-11-06 22:28:49,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:28:49,986 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2020-11-06 22:28:49,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:28:49,987 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:28:49,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:28:49,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:28:49,987 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:28:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:28:49,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1580213275, now seen corresponding path program 1 times [2020-11-06 22:28:49,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:28:49,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676576442] [2020-11-06 22:28:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:28:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:50,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:28:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:50,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:28:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:28:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:28:50,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676576442] [2020-11-06 22:28:50,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:28:50,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 22:28:50,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277793658] [2020-11-06 22:28:50,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:28:50,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:28:50,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:28:50,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:28:50,344 INFO L87 Difference]: Start difference. First operand 16 states and 15 transitions. Second operand 8 states. [2020-11-06 22:28:50,516 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-11-06 22:28:50,681 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-11-06 22:28:50,946 WARN L194 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-11-06 22:28:50,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:28:50,954 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2020-11-06 22:28:50,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:28:50,956 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-11-06 22:28:50,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:28:50,957 INFO L225 Difference]: With dead ends: 16 [2020-11-06 22:28:50,957 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:28:50,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:28:50,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:28:50,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:28:50,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:28:50,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:28:50,961 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-11-06 22:28:50,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:28:50,962 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:28:50,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:28:50,962 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:28:50,962 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:28:50,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:28:50,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:28:51,245 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:28:51,245 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:28:51,246 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:28:51,246 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:28:51,246 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:28:51,246 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= ~p2~0.offset |old(~p2~0.offset)|) (= |~#b~0.base| |old(~#b~0.base)|) (= ~p1~0.offset |old(~p1~0.offset)|) (= |~#a~0.base| |old(~#a~0.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |old(#valid)| |#valid|) (= |#t~string5.base| |old(#t~string5.base)|) (= ~p2~0.base |old(~p2~0.base)|) (= |~#b~0.offset| |old(~#b~0.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~p1~0.base |old(~p1~0.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2020-11-06 22:28:51,246 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:28:51,247 INFO L266 CegarLoopResult]: For program point L11(lines 11 16) no Hoare annotation was computed. [2020-11-06 22:28:51,247 INFO L266 CegarLoopResult]: For program point fEXIT(lines 9 17) no Hoare annotation was computed. [2020-11-06 22:28:51,247 INFO L262 CegarLoopResult]: At program point fENTRY(lines 9 17) 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|)) [2020-11-06 22:28:51,247 INFO L266 CegarLoopResult]: For program point fFINAL(lines 9 17) no Hoare annotation was computed. [2020-11-06 22:28:51,247 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:28:51,248 INFO L262 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (not (= |~#b~0.base| |~#a~0.base|)) [2020-11-06 22:28:51,248 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:28:51,248 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:28:51,248 INFO L262 CegarLoopResult]: At program point L32(lines 19 39) the Hoare annotation is: (= |~#a~0.base| |~#b~0.base|) [2020-11-06 22:28:51,248 INFO L266 CegarLoopResult]: For program point L31(lines 31 33) no Hoare annotation was computed. [2020-11-06 22:28:51,248 INFO L262 CegarLoopResult]: At program point mainENTRY(lines 19 39) the Hoare annotation is: (or (and (= ~p2~0.base |old(~p2~0.base)|) (= |old(~p2~0.offset)| ~p2~0.offset) (= |old(~p1~0.offset)| ~p1~0.offset) (= |old(~p1~0.base)| ~p1~0.base)) (= |~#b~0.base| |~#a~0.base|)) [2020-11-06 22:28:51,249 INFO L262 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (or (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|)) [2020-11-06 22:28:51,249 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 19 39) no Hoare annotation was computed. [2020-11-06 22:28:51,249 INFO L266 CegarLoopResult]: For program point L29-1(line 29) no Hoare annotation was computed. [2020-11-06 22:28:51,249 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 19 39) no Hoare annotation was computed. [2020-11-06 22:28:51,249 INFO L266 CegarLoopResult]: For program point L37(line 37) no Hoare annotation was computed. [2020-11-06 22:28:51,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:28:51 BoogieIcfgContainer [2020-11-06 22:28:51,268 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:28:51,270 INFO L168 Benchmark]: Toolchain (without parser) took 3048.06 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 125.9 MB in the beginning and 84.9 MB in the end (delta: 41.0 MB). Peak memory consumption was 72.9 MB. Max. memory is 8.0 GB. [2020-11-06 22:28:51,271 INFO L168 Benchmark]: CDTParser took 1.32 ms. Allocated memory is still 151.0 MB. Free memory is still 122.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:28:51,272 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.00 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 116.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:28:51,273 INFO L168 Benchmark]: Boogie Preprocessor took 34.65 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:28:51,274 INFO L168 Benchmark]: RCFGBuilder took 415.14 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 100.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:28:51,275 INFO L168 Benchmark]: TraceAbstraction took 2356.03 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 99.9 MB in the beginning and 84.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 46.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:28:51,279 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.32 ms. Allocated memory is still 151.0 MB. Free memory is still 122.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 228.00 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 116.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.65 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 415.14 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 100.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2356.03 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 99.9 MB in the beginning and 84.9 MB in the end (delta: 15.0 MB). Peak memory consumption was 46.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 19]: Loop Invariant Derived loop invariant: a == b - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 7 SDslu, 47 SDs, 0 SdLazy, 82 SolverSat, 11 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, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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, 8 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 126 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 115 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 4004 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...