/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/test09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:26:24,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:26:24,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:26:24,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 18:26:25,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:26:25,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:26:25,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:26:25,042 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 [2020-10-23 18:26:25,071 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:26:25,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:26:25,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:26:25,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:26:25,073 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:26:25,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:26:25,074 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:26:25,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:26:25,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:26:25,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:26:25,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:26:25,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:26:25,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:26:25,075 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:26:25,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:26:25,076 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:26:25,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:26:25,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:26:25,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:26:25,076 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:26:25,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:26:25,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:26:25,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:26:25,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:26:25,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:26:25,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:26:25,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:26:25,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:26:25,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:26:25,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:26:25,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:26:25,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:26:25,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:26:25,502 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:26:25,502 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:26:25,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test09.c [2020-10-23 18:26:25,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/351bc469b/508825a7453443c8bc61056efa2109aa/FLAG50737ae0e [2020-10-23 18:26:26,200 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:26:26,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test09.c [2020-10-23 18:26:26,208 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/351bc469b/508825a7453443c8bc61056efa2109aa/FLAG50737ae0e [2020-10-23 18:26:26,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/351bc469b/508825a7453443c8bc61056efa2109aa [2020-10-23 18:26:26,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:26:26,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:26:26,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:26:26,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:26:26,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:26:26,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:26:26" (1/1) ... [2020-10-23 18:26:26,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ddc771c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:26, skipping insertion in model container [2020-10-23 18:26:26,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:26:26" (1/1) ... [2020-10-23 18:26:26,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:26:26,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:26:26,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:26:26,768 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:26:26,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:26:26,799 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:26:26,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:26 WrapperNode [2020-10-23 18:26:26,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:26:26,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:26:26,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:26:26,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:26:26,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:26" (1/1) ... [2020-10-23 18:26:26,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:26" (1/1) ... [2020-10-23 18:26:26,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:26" (1/1) ... [2020-10-23 18:26:26,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:26" (1/1) ... [2020-10-23 18:26:26,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:26" (1/1) ... [2020-10-23 18:26:26,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:26" (1/1) ... [2020-10-23 18:26:26,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:26" (1/1) ... [2020-10-23 18:26:26,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:26:26,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:26:26,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:26:26,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:26:26,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:26" (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 [2020-10-23 18:26:26,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:26:26,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:26:26,925 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:26:26,925 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-10-23 18:26:26,926 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:26:26,926 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:26:26,926 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:26:26,926 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:26:26,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:26:26,926 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-10-23 18:26:26,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:26:26,927 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:26:26,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:26:26,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:26:26,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:26:26,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:26:26,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:26:27,206 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:26:27,206 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:26:27,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:26:27 BoogieIcfgContainer [2020-10-23 18:26:27,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:26:27,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:26:27,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:26:27,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:26:27,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:26:26" (1/3) ... [2020-10-23 18:26:27,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48acebe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:26:27, skipping insertion in model container [2020-10-23 18:26:27,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:26" (2/3) ... [2020-10-23 18:26:27,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48acebe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:26:27, skipping insertion in model container [2020-10-23 18:26:27,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:26:27" (3/3) ... [2020-10-23 18:26:27,217 INFO L111 eAbstractionObserver]: Analyzing ICFG test09.c [2020-10-23 18:26:27,235 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:26:27,241 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:26:27,256 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:26:27,302 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:26:27,302 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:26:27,303 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:26:27,304 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:26:27,304 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:26:27,304 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:26:27,304 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:26:27,304 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:26:27,345 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-23 18:26:27,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:26:27,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:27,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:27,352 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:27,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:27,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1827250340, now seen corresponding path program 1 times [2020-10-23 18:26:27,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:27,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915956861] [2020-10-23 18:26:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:27,766 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-10-23 18:26:27,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:27,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:26:27,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915956861] [2020-10-23 18:26:27,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:26:27,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:26:27,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279782014] [2020-10-23 18:26:27,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:26:27,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:27,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:26:27,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:26:27,998 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2020-10-23 18:26:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:28,229 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-10-23 18:26:28,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:26:28,231 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:26:28,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:28,241 INFO L225 Difference]: With dead ends: 38 [2020-10-23 18:26:28,241 INFO L226 Difference]: Without dead ends: 16 [2020-10-23 18:26:28,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:26:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-23 18:26:28,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-23 18:26:28,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-23 18:26:28,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2020-10-23 18:26:28,288 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 15 [2020-10-23 18:26:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:28,289 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2020-10-23 18:26:28,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:26:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2020-10-23 18:26:28,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:26:28,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:28,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:28,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:26:28,291 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:28,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1580213275, now seen corresponding path program 1 times [2020-10-23 18:26:28,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:28,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569385611] [2020-10-23 18:26:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:28,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:28,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:26:28,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569385611] [2020-10-23 18:26:28,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:26:28,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:26:28,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638771636] [2020-10-23 18:26:28,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:26:28,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:28,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:26:28,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:26:28,601 INFO L87 Difference]: Start difference. First operand 16 states and 15 transitions. Second operand 8 states. [2020-10-23 18:26:28,989 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-23 18:26:28,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:28,994 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2020-10-23 18:26:28,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:26:28,994 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-23 18:26:28,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:28,995 INFO L225 Difference]: With dead ends: 16 [2020-10-23 18:26:28,995 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:26:28,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:26:28,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:26:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:26:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:26:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:26:28,998 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-10-23 18:26:28,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:28,998 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:26:28,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:26:28,998 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:26:28,999 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:26:28,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:26:29,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:26:29,238 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-23 18:26:29,239 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 18:26:29,239 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-23 18:26:29,239 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-23 18:26:29,240 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:26:29,240 INFO L270 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)|)) [2020-10-23 18:26:29,240 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:26:29,240 INFO L274 CegarLoopResult]: For program point L11(lines 11 16) no Hoare annotation was computed. [2020-10-23 18:26:29,241 INFO L274 CegarLoopResult]: For program point fEXIT(lines 9 17) no Hoare annotation was computed. [2020-10-23 18:26:29,241 INFO L270 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|)) [2020-10-23 18:26:29,241 INFO L274 CegarLoopResult]: For program point fFINAL(lines 9 17) no Hoare annotation was computed. [2020-10-23 18:26:29,241 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:26:29,241 INFO L270 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (= ~p2~0.base ~p1~0.base) (= ~p2~0.offset ~p1~0.offset) (not (= |~#b~0.base| |~#a~0.base|))) [2020-10-23 18:26:29,242 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:26:29,242 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:26:29,242 INFO L274 CegarLoopResult]: For program point L33(lines 33 35) no Hoare annotation was computed. [2020-10-23 18:26:29,242 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 19 41) the Hoare annotation is: (or (not (= |old(~p2~0.offset)| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |old(~p2~0.base)|)) (and (= |old(~p1~0.offset)| ~p1~0.offset) (= ~p2~0.base ~p1~0.base) (= |old(~p1~0.base)| ~p1~0.base) (= ~p2~0.offset ~p1~0.offset)) (= |~#b~0.base| |~#a~0.base|)) [2020-10-23 18:26:29,242 INFO L270 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (or (not (= |old(~p2~0.offset)| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |old(~p2~0.base)|)) (and (= |~#a~0.base| ~p1~0.base) (= ~p1~0.offset |~#a~0.offset|) (= (select (select |#memory_int| ~p2~0.base) ~p2~0.offset) 1)) (= |~#b~0.base| |~#a~0.base|)) [2020-10-23 18:26:29,243 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 19 41) no Hoare annotation was computed. [2020-10-23 18:26:29,243 INFO L274 CegarLoopResult]: For program point L29-1(line 29) no Hoare annotation was computed. [2020-10-23 18:26:29,243 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 19 41) no Hoare annotation was computed. [2020-10-23 18:26:29,243 INFO L274 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-10-23 18:26:29,243 INFO L270 CegarLoopResult]: At program point L34(lines 19 41) the Hoare annotation is: (or (not (= |old(~p2~0.offset)| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |old(~p2~0.base)|)) (= |~#a~0.base| |~#b~0.base|)) [2020-10-23 18:26:29,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:26:29 BoogieIcfgContainer [2020-10-23 18:26:29,261 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:26:29,264 INFO L168 Benchmark]: Toolchain (without parser) took 2703.82 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 73.8 MB in the end (delta: 52.1 MB). Peak memory consumption was 83.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:29,264 INFO L168 Benchmark]: CDTParser took 1.36 ms. Allocated memory is still 151.0 MB. Free memory is still 122.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:26:29,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.73 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. [2020-10-23 18:26:29,266 INFO L168 Benchmark]: Boogie Preprocessor took 35.89 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:29,267 INFO L168 Benchmark]: RCFGBuilder took 369.69 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 100.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:29,268 INFO L168 Benchmark]: TraceAbstraction took 2052.02 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 100.0 MB in the beginning and 73.8 MB in the end (delta: 26.2 MB). Peak memory consumption was 57.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:29,272 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.36 ms. Allocated memory is still 151.0 MB. Free memory is still 122.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 234.73 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 35.89 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 369.69 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 100.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2052.02 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 100.0 MB in the beginning and 73.8 MB in the end (delta: 26.2 MB). Peak memory consumption was 57.3 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: (!(\old(p2) == \old(p1)) || !(\old(p1) == \old(p2))) || a == b - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 14 SDslu, 35 SDs, 0 SdLazy, 68 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s 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, 158 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 121 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 3752 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...