/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:26:45,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:26:45,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:26:45,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:26:45,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:26:45,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:26:45,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:26:45,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:26:45,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:26:45,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:26:45,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:26:45,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:26:45,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:26:45,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:26:45,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:26:45,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:26:45,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:26:45,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:26:45,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:26:45,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:26:45,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:26:45,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:26:45,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:26:45,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:26:45,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 17:26:45,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 17:26:45,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 17:26:45,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 17:26:45,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 17:26:45,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 17:26:45,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 17:26:45,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 17:26:45,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 17:26:45,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:26:45,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:26:45,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:26:45,405 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:26:45,435 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:26:45,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:26:45,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:26:45,437 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:26:45,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:26:45,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:26:45,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:26:45,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:26:45,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:26:45,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:26:45,439 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:26:45,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:26:45,439 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:26:45,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:26:45,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:26:45,440 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:26:45,440 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:26:45,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:26:45,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:26:45,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:26:45,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:26:45,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:26:45,441 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-17 17:26:45,732 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:26:45,745 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:26:45,748 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:26:45,751 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:26:45,751 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:26:45,752 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test08.c [2020-07-17 17:26:45,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/664bc598b/460b7d765a7f4274a98c823ac537471e/FLAG361ea91b8 [2020-07-17 17:26:46,320 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:26:46,321 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test08.c [2020-07-17 17:26:46,328 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/664bc598b/460b7d765a7f4274a98c823ac537471e/FLAG361ea91b8 [2020-07-17 17:26:46,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/664bc598b/460b7d765a7f4274a98c823ac537471e [2020-07-17 17:26:46,668 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:26:46,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:26:46,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:26:46,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:26:46,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:26:46,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:26:46" (1/1) ... [2020-07-17 17:26:46,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4490669e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:46, skipping insertion in model container [2020-07-17 17:26:46,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:26:46" (1/1) ... [2020-07-17 17:26:46,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:26:46,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:26:46,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:26:46,888 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:26:46,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:26:46,923 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:26:46,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:46 WrapperNode [2020-07-17 17:26:46,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:26:46,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:26:46,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:26:46,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:26:47,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:46" (1/1) ... [2020-07-17 17:26:47,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:46" (1/1) ... [2020-07-17 17:26:47,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:46" (1/1) ... [2020-07-17 17:26:47,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:46" (1/1) ... [2020-07-17 17:26:47,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:46" (1/1) ... [2020-07-17 17:26:47,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:46" (1/1) ... [2020-07-17 17:26:47,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:46" (1/1) ... [2020-07-17 17:26:47,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:26:47,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:26:47,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:26:47,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:26:47,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:26:47,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:26:47,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:26:47,143 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-17 17:26:47,143 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:26:47,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:26:47,144 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-17 17:26:47,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 17:26:47,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:26:47,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 17:26:47,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:26:47,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 17:26:47,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-17 17:26:47,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:26:47,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 17:26:47,404 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:26:47,404 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 17:26:47,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:26:47 BoogieIcfgContainer [2020-07-17 17:26:47,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:26:47,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:26:47,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:26:47,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:26:47,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:26:46" (1/3) ... [2020-07-17 17:26:47,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c0b0e3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:26:47, skipping insertion in model container [2020-07-17 17:26:47,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:26:46" (2/3) ... [2020-07-17 17:26:47,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c0b0e3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:26:47, skipping insertion in model container [2020-07-17 17:26:47,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:26:47" (3/3) ... [2020-07-17 17:26:47,421 INFO L109 eAbstractionObserver]: Analyzing ICFG test08.c [2020-07-17 17:26:47,435 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:26:47,445 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:26:47,466 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:26:47,500 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:26:47,501 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:26:47,501 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:26:47,501 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:26:47,501 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:26:47,501 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:26:47,502 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:26:47,502 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:26:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-07-17 17:26:47,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-17 17:26:47,576 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:26:47,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:26:47,577 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:26:47,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:26:47,584 INFO L82 PathProgramCache]: Analyzing trace with hash 56438835, now seen corresponding path program 1 times [2020-07-17 17:26:47,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:26:47,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564714179] [2020-07-17 17:26:47,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:26:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:26:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:26:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:26:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:26:48,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564714179] [2020-07-17 17:26:48,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:26:48,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 17:26:48,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29147490] [2020-07-17 17:26:48,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:26:48,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:26:48,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:26:48,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:26:48,212 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 9 states. [2020-07-17 17:26:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:26:48,643 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-07-17 17:26:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 17:26:48,645 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-07-17 17:26:48,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:26:48,656 INFO L225 Difference]: With dead ends: 71 [2020-07-17 17:26:48,656 INFO L226 Difference]: Without dead ends: 43 [2020-07-17 17:26:48,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-07-17 17:26:48,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-17 17:26:48,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-17 17:26:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-17 17:26:48,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 42 transitions. [2020-07-17 17:26:48,710 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 42 transitions. Word has length 41 [2020-07-17 17:26:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:26:48,711 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 42 transitions. [2020-07-17 17:26:48,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:26:48,712 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 42 transitions. [2020-07-17 17:26:48,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-17 17:26:48,713 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:26:48,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:26:48,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:26:48,715 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:26:48,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:26:48,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1088655632, now seen corresponding path program 1 times [2020-07-17 17:26:48,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:26:48,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319690380] [2020-07-17 17:26:48,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:26:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:26:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:26:48,855 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 17:26:48,855 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 17:26:48,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:26:48,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:26:48 BoogieIcfgContainer [2020-07-17 17:26:48,920 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:26:48,923 INFO L168 Benchmark]: Toolchain (without parser) took 2252.51 ms. Allocated memory was 143.1 MB in the beginning and 230.2 MB in the end (delta: 87.0 MB). Free memory was 101.6 MB in the beginning and 185.4 MB in the end (delta: -83.8 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-07-17 17:26:48,925 INFO L168 Benchmark]: CDTParser took 0.92 ms. Allocated memory is still 143.1 MB. Free memory was 119.8 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 17:26:48,926 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.40 ms. Allocated memory is still 143.1 MB. Free memory was 101.2 MB in the beginning and 91.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-17 17:26:48,927 INFO L168 Benchmark]: Boogie Preprocessor took 145.69 ms. Allocated memory was 143.1 MB in the beginning and 201.3 MB in the end (delta: 58.2 MB). Free memory was 91.4 MB in the beginning and 179.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-17 17:26:48,928 INFO L168 Benchmark]: RCFGBuilder took 341.28 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 161.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-07-17 17:26:48,933 INFO L168 Benchmark]: TraceAbstraction took 1506.87 ms. Allocated memory was 201.3 MB in the beginning and 230.2 MB in the end (delta: 28.8 MB). Free memory was 161.2 MB in the beginning and 185.4 MB in the end (delta: -24.3 MB). Peak memory consumption was 4.6 MB. Max. memory is 7.1 GB. [2020-07-17 17:26:48,938 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.92 ms. Allocated memory is still 143.1 MB. Free memory was 119.8 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.40 ms. Allocated memory is still 143.1 MB. Free memory was 101.2 MB in the beginning and 91.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 145.69 ms. Allocated memory was 143.1 MB in the beginning and 201.3 MB in the end (delta: 58.2 MB). Free memory was 91.4 MB in the beginning and 179.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 341.28 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 161.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1506.87 ms. Allocated memory was 201.3 MB in the beginning and 230.2 MB in the end (delta: 28.8 MB). Free memory was 161.2 MB in the beginning and 185.4 MB in the end (delta: -24.3 MB). Peak memory consumption was 4.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 36]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int a, b; VAL [\old(a)=11, \old(a)=6, \old(b)=9, \old(b)=14, \old(p1)=10, \old(p1)=15, \old(p2)=12, \old(p2)=7, a={3:0}, b={2:0}, p1={10:15}, p2={12:7}] [L5] int *p1, *p2; VAL [\old(a)=11, \old(a)=6, \old(b)=14, \old(b)=9, \old(p1)=15, \old(p1)=10, \old(p2)=12, \old(p2)=7, a={3:0}, b={2:0}, p1={0:0}, p2={0:0}] [L19] p1 = &a VAL [\old(p1)=0, \old(p1)=0, \old(p2)=0, \old(p2)=0, a={3:0}, b={2:0}, p1={3:0}, p2={0:0}] [L20] p2 = &b VAL [\old(p1)=0, \old(p1)=0, \old(p2)=0, \old(p2)=0, a={3:0}, b={2:0}, p1={3:0}, p2={2:0}] [L22] b = 1 VAL [\old(p1)=0, \old(p1)=0, \old(p2)=0, \old(p2)=0, a={3:0}, b={2:0}, p1={3:0}, p2={2:0}] [L23] a = 5 VAL [\old(p1)=0, \old(p1)=0, \old(p2)=0, \old(p2)=0, a={3:0}, b={2:0}, p1={3:0}, p2={2:0}] [L25] EXPR \read(a) VAL [\old(p1)=0, \old(p1)=0, \old(p2)=0, \old(p2)=0, \read(a)=5, a={3:0}, b={2:0}, p1={3:0}, p2={2:0}] [L25] a-- VAL [\old(p1)=0, \old(p1)=0, \old(p2)=0, \old(p2)=0, \read(a)=5, a={3:0}, b={2:0}, p1={3:0}, p2={2:0}] [L27] CALL, EXPR f() VAL [\old(p1)=0, \old(p1)=3, \old(p2)=0, \old(p2)=0, a={3:0}, b={2:0}, p1={3:0}, p2={2:0}] [L8] EXPR \read(*p1) VAL [\old(p1)=3, \old(p1)=0, \old(p2)=0, \old(p2)=0, \read(*p1)=4, a={3:0}, b={2:0}, p1={3:0}, p2={2:0}] [L8] EXPR \read(*p2) VAL [\old(p1)=3, \old(p1)=0, \old(p2)=0, \old(p2)=0, \read(*p1)=4, \read(*p2)=1, a={3:0}, b={2:0}, p1={3:0}, p2={2:0}] [L8] EXPR \read(a) VAL [\old(p1)=0, \old(p1)=3, \old(p2)=0, \old(p2)=0, \read(*p1)=4, \read(*p2)=1, \read(a)=4, a={3:0}, b={2:0}, p1={3:0}, p2={2:0}] [L8] int v = *p1 + *p2 - a; VAL [\old(p1)=0, \old(p1)=3, \old(p2)=0, \old(p2)=0, \read(*p1)=4, \read(*p2)=1, \read(a)=4, a={3:0}, b={2:0}, p1={3:0}, p2={2:0}, v=1] [L9] COND TRUE v == 1 VAL [\old(p1)=0, \old(p1)=3, \old(p2)=0, \old(p2)=0, a={3:0}, b={2:0}, p1={3:0}, p2={2:0}, v=1] [L10] p1 = p2 VAL [\old(p1)=0, \old(p1)=3, \old(p2)=0, \old(p2)=0, a={3:0}, b={2:0}, p1={2:0}, p2={2:0}, v=1] [L11] return v; VAL [\old(p1)=0, \old(p1)=3, \old(p2)=0, \old(p2)=0, \result=1, a={3:0}, b={2:0}, p1={2:0}, p2={2:0}, v=1] [L27] RET, EXPR f() VAL [\old(p1)=0, \old(p1)=0, \old(p2)=0, \old(p2)=0, a={3:0}, b={2:0}, f()=1, p1={2:0}, p2={2:0}] [L27] a = f() VAL [\old(p1)=0, \old(p1)=0, \old(p2)=0, \old(p2)=0, a={3:0}, b={2:0}, f()=1, p1={2:0}, p2={2:0}] [L29] EXPR \read(a) VAL [\old(p1)=0, \old(p1)=0, \old(p2)=0, \old(p2)=0, \read(a)=1, a={3:0}, b={2:0}, p1={2:0}, p2={2:0}] [L29] COND TRUE a && p1 == p2 VAL [\old(p1)=0, \old(p1)=0, \old(p2)=0, \old(p2)=0, \read(a)=1, a={3:0}, b={2:0}, p1={2:0}, p2={2:0}] [L36] __VERIFIER_error() VAL [\old(p1)=0, \old(p1)=0, \old(p2)=0, \old(p2)=0, a={3:0}, b={2:0}, p1={2:0}, p2={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 149 SDslu, 78 SDs, 0 SdLazy, 107 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred 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, 0.4s InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 6920 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...