/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/test29-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 22:06:33,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 22:06:33,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 22:06:33,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-09-04 22:06:33,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 22:06:33,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 22:06:33,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 22:06:33,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 22:06:34,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 22:06:34,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 22:06:34,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 22:06:34,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 22:06:34,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 22:06:34,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 22:06:34,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 22:06:34,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 22:06:34,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 22:06:34,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 22:06:34,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 22:06:34,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 22:06:34,026 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 22:06:34,037 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 22:06:34,037 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 22:06:34,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 22:06:34,039 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 22:06:34,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 22:06:34,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 22:06:34,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 22:06:34,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 22:06:34,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 22:06:34,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 22:06:34,040 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 22:06:34,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 22:06:34,041 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 22:06:34,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 22:06:34,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 22:06:34,041 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 22:06:34,042 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 22:06:34,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 22:06:34,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 22:06:34,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 22:06:34,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 22:06:34,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 22:06:34,043 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 [2020-09-04 22:06:34,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 22:06:34,542 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 22:06:34,546 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 22:06:34,548 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 22:06:34,549 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 22:06:34,550 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2020-09-04 22:06:34,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bee95fa0/d5eca2f5875b4f0baff549033555919a/FLAG4c4a13015 [2020-09-04 22:06:35,208 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 22:06:35,209 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test29-1.c [2020-09-04 22:06:35,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bee95fa0/d5eca2f5875b4f0baff549033555919a/FLAG4c4a13015 [2020-09-04 22:06:35,568 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1bee95fa0/d5eca2f5875b4f0baff549033555919a [2020-09-04 22:06:35,583 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 22:06:35,585 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 22:06:35,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 22:06:35,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 22:06:35,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 22:06:35,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:06:35" (1/1) ... [2020-09-04 22:06:35,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a94c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:35, skipping insertion in model container [2020-09-04 22:06:35,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:06:35" (1/1) ... [2020-09-04 22:06:35,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 22:06:35,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 22:06:35,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:06:35,877 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 22:06:35,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:06:35,911 INFO L208 MainTranslator]: Completed translation [2020-09-04 22:06:35,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:35 WrapperNode [2020-09-04 22:06:35,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 22:06:35,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 22:06:35,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 22:06:35,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 22:06:36,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:35" (1/1) ... [2020-09-04 22:06:36,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:35" (1/1) ... [2020-09-04 22:06:36,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:35" (1/1) ... [2020-09-04 22:06:36,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:35" (1/1) ... [2020-09-04 22:06:36,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:35" (1/1) ... [2020-09-04 22:06:36,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:35" (1/1) ... [2020-09-04 22:06:36,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:35" (1/1) ... [2020-09-04 22:06:36,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 22:06:36,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 22:06:36,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 22:06:36,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 22:06:36,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 22:06:36,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 22:06:36,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 22:06:36,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 22:06:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 22:06:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 22:06:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 22:06:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 22:06:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 22:06:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 22:06:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 22:06:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 22:06:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 22:06:36,454 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 22:06:36,455 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 22:06:36,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:06:36 BoogieIcfgContainer [2020-09-04 22:06:36,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 22:06:36,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 22:06:36,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 22:06:36,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 22:06:36,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 10:06:35" (1/3) ... [2020-09-04 22:06:36,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@97d91ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:06:36, skipping insertion in model container [2020-09-04 22:06:36,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:35" (2/3) ... [2020-09-04 22:06:36,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@97d91ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:06:36, skipping insertion in model container [2020-09-04 22:06:36,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:06:36" (3/3) ... [2020-09-04 22:06:36,471 INFO L109 eAbstractionObserver]: Analyzing ICFG test29-1.c [2020-09-04 22:06:36,483 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 22:06:36,496 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 22:06:36,517 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 22:06:36,543 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 22:06:36,543 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 22:06:36,544 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 22:06:36,544 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 22:06:36,544 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 22:06:36,544 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 22:06:36,544 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 22:06:36,544 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 22:06:36,560 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-09-04 22:06:36,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 22:06:36,572 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:36,573 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] [2020-09-04 22:06:36,573 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:36,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:36,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1161029953, now seen corresponding path program 1 times [2020-09-04 22:06:36,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:36,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748991130] [2020-09-04 22:06:36,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:36,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:36,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748991130] [2020-09-04 22:06:36,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:06:36,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 22:06:36,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903669878] [2020-09-04 22:06:36,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 22:06:36,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:36,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 22:06:36,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 22:06:36,870 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 4 states. [2020-09-04 22:06:37,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:37,015 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-09-04 22:06:37,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 22:06:37,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-09-04 22:06:37,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:37,031 INFO L225 Difference]: With dead ends: 57 [2020-09-04 22:06:37,031 INFO L226 Difference]: Without dead ends: 32 [2020-09-04 22:06:37,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 22:06:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-04 22:06:37,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-09-04 22:06:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 22:06:37,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-09-04 22:06:37,085 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2020-09-04 22:06:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:37,086 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-09-04 22:06:37,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 22:06:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-09-04 22:06:37,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 22:06:37,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:37,088 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] [2020-09-04 22:06:37,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 22:06:37,088 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:37,089 INFO L82 PathProgramCache]: Analyzing trace with hash -403696930, now seen corresponding path program 1 times [2020-09-04 22:06:37,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:37,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634846240] [2020-09-04 22:06:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:37,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:37,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634846240] [2020-09-04 22:06:37,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:06:37,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 22:06:37,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17354794] [2020-09-04 22:06:37,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 22:06:37,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:37,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 22:06:37,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 22:06:37,243 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 7 states. [2020-09-04 22:06:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:37,420 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-09-04 22:06:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 22:06:37,421 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-04 22:06:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:37,422 INFO L225 Difference]: With dead ends: 58 [2020-09-04 22:06:37,423 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 22:06:37,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-04 22:06:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 22:06:37,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-09-04 22:06:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-04 22:06:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-09-04 22:06:37,440 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 29 [2020-09-04 22:06:37,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:37,440 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-09-04 22:06:37,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 22:06:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-09-04 22:06:37,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 22:06:37,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:37,442 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] [2020-09-04 22:06:37,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 22:06:37,442 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:37,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:37,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2120633538, now seen corresponding path program 1 times [2020-09-04 22:06:37,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:37,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599772058] [2020-09-04 22:06:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:06:37,471 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:06:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:06:37,494 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:06:37,526 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 22:06:37,526 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 22:06:37,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 22:06:37,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 10:06:37 BoogieIcfgContainer [2020-09-04 22:06:37,572 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 22:06:37,576 INFO L168 Benchmark]: Toolchain (without parser) took 1989.33 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 101.7 MB in the beginning and 95.0 MB in the end (delta: 6.7 MB). Peak memory consumption was 70.1 MB. Max. memory is 7.1 GB. [2020-09-04 22:06:37,577 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-09-04 22:06:37,578 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.95 ms. Allocated memory is still 137.9 MB. Free memory was 101.3 MB in the beginning and 91.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-04 22:06:37,579 INFO L168 Benchmark]: Boogie Preprocessor took 119.22 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 91.3 MB in the beginning and 178.6 MB in the end (delta: -87.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-09-04 22:06:37,580 INFO L168 Benchmark]: RCFGBuilder took 428.44 ms. Allocated memory is still 201.3 MB. Free memory was 178.6 MB in the beginning and 162.7 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2020-09-04 22:06:37,581 INFO L168 Benchmark]: TraceAbstraction took 1110.01 ms. Allocated memory is still 201.3 MB. Free memory was 162.7 MB in the beginning and 95.0 MB in the end (delta: 67.7 MB). Peak memory consumption was 67.7 MB. Max. memory is 7.1 GB. [2020-09-04 22:06:37,585 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 325.95 ms. Allocated memory is still 137.9 MB. Free memory was 101.3 MB in the beginning and 91.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.22 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 91.3 MB in the beginning and 178.6 MB in the end (delta: -87.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 428.44 ms. Allocated memory is still 201.3 MB. Free memory was 178.6 MB in the beginning and 162.7 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1110.01 ms. Allocated memory is still 201.3 MB. Free memory was 162.7 MB in the beginning and 95.0 MB in the end (delta: 67.7 MB). Peak memory consumption was 67.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 28]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] union dummy d1, d2; VAL [d1={3:0}, d2={2:0}] [L14] int n = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=0, d1={3:0}, d2={2:0}, n=0] [L15] EXPR n ? &d1 : &d2 VAL [d1={3:0}, d2={2:0}, n=0, n ? &d1 : &d2={2:0}] [L15] union dummy *pd = n ? &d1 : &d2; VAL [d1={3:0}, d2={2:0}, n=0, n ? &d1 : &d2={2:0}, pd={2:0}] [L16] d1.a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-1, d1={3:0}, d2={2:0}, n=0, pd={2:0}] [L17] COND FALSE !(pd == &d1) VAL [d1={3:0}, d2={2:0}, n=0, pd={2:0}] [L20] pd->b = 0 VAL [d1={3:0}, d2={2:0}, n=0, pd={2:0}] [L22] pd == &d2 && d1.a != 0 VAL [d1={3:0}, d2={2:0}, n=0, pd={2:0}, pd == &d2 && d1.a != 0=1] [L22] EXPR d1.a VAL [d1={3:0}, d1.a=-1, d2={2:0}, n=0, pd={2:0}, pd == &d2 && d1.a != 0=1] [L22] pd == &d2 && d1.a != 0 VAL [d1={3:0}, d1.a=-1, d2={2:0}, n=0, pd={2:0}, pd == &d2 && d1.a != 0=1] [L22] COND TRUE pd == &d2 && d1.a != 0 VAL [d1={3:0}, d1.a=-1, d2={2:0}, n=0, pd={2:0}, pd == &d2 && d1.a != 0=1] [L28] __VERIFIER_error() VAL [d1={3:0}, d2={2:0}, n=0, pd={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 65 SDtfs, 87 SDslu, 98 SDs, 0 SdLazy, 111 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred 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, 10 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 3008 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 incorrect! Received shutdown request...