/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 --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/test28-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 05:17:03,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 05:17:03,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 05:17:03,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 05:17:03,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 05:17:03,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 05:17:03,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 05:17:03,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 05:17:03,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 05:17:03,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 05:17:03,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 05:17:03,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 05:17:03,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 05:17:03,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 05:17:03,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 05:17:03,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 05:17:03,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 05:17:03,948 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 05:17:03,960 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 05:17:03,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 05:17:03,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 05:17:03,962 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 05:17:03,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 05:17:03,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 05:17:03,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 05:17:03,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 05:17:03,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 05:17:03,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 05:17:03,963 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 05:17:03,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 05:17:03,964 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 05:17:03,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 05:17:03,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 05:17:03,964 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 05:17:03,964 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 05:17:03,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 05:17:03,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:17:03,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 05:17:03,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 05:17:03,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 05:17:03,965 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 05:17:04,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 05:17:04,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 05:17:04,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 05:17:04,366 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 05:17:04,367 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 05:17:04,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-1.c [2020-11-07 05:17:04,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f85563e7e/016d610cd8f84993aa98c14e96f2b641/FLAGb1351d2b1 [2020-11-07 05:17:05,058 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 05:17:05,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-1.c [2020-11-07 05:17:05,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f85563e7e/016d610cd8f84993aa98c14e96f2b641/FLAGb1351d2b1 [2020-11-07 05:17:05,452 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f85563e7e/016d610cd8f84993aa98c14e96f2b641 [2020-11-07 05:17:05,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 05:17:05,464 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 05:17:05,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 05:17:05,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 05:17:05,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 05:17:05,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:17:05" (1/1) ... [2020-11-07 05:17:05,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@508f21ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:05, skipping insertion in model container [2020-11-07 05:17:05,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:17:05" (1/1) ... [2020-11-07 05:17:05,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 05:17:05,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 05:17:05,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:17:05,684 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 05:17:05,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:17:05,718 INFO L208 MainTranslator]: Completed translation [2020-11-07 05:17:05,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:05 WrapperNode [2020-11-07 05:17:05,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 05:17:05,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 05:17:05,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 05:17:05,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 05:17:05,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:05" (1/1) ... [2020-11-07 05:17:05,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:05" (1/1) ... [2020-11-07 05:17:05,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:05" (1/1) ... [2020-11-07 05:17:05,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:05" (1/1) ... [2020-11-07 05:17:05,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:05" (1/1) ... [2020-11-07 05:17:05,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:05" (1/1) ... [2020-11-07 05:17:05,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:05" (1/1) ... [2020-11-07 05:17:05,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 05:17:05,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 05:17:05,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 05:17:05,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 05:17:05,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:17:05,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 05:17:05,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 05:17:05,844 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 05:17:05,844 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 05:17:05,844 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 05:17:05,845 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 05:17:05,845 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 05:17:05,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 05:17:05,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 05:17:05,846 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 05:17:05,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 05:17:05,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 05:17:05,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 05:17:05,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 05:17:05,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 05:17:05,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 05:17:06,228 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 05:17:06,228 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 05:17:06,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:17:06 BoogieIcfgContainer [2020-11-07 05:17:06,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 05:17:06,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 05:17:06,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 05:17:06,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 05:17:06,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:17:05" (1/3) ... [2020-11-07 05:17:06,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688782d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:17:06, skipping insertion in model container [2020-11-07 05:17:06,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:17:05" (2/3) ... [2020-11-07 05:17:06,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688782d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:17:06, skipping insertion in model container [2020-11-07 05:17:06,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:17:06" (3/3) ... [2020-11-07 05:17:06,239 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-1.c [2020-11-07 05:17:06,257 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 05:17:06,264 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 05:17:06,290 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 05:17:06,328 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 05:17:06,328 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 05:17:06,328 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 05:17:06,330 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 05:17:06,330 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 05:17:06,331 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 05:17:06,331 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 05:17:06,331 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 05:17:06,357 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-11-07 05:17:06,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-07 05:17:06,370 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:17:06,371 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] [2020-11-07 05:17:06,372 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:17:06,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:17:06,381 INFO L82 PathProgramCache]: Analyzing trace with hash -866172814, now seen corresponding path program 1 times [2020-11-07 05:17:06,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:17:06,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915263017] [2020-11-07 05:17:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:17:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:06,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:17:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:17:06,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915263017] [2020-11-07 05:17:06,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:17:06,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-07 05:17:06,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546421804] [2020-11-07 05:17:06,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-07 05:17:06,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:17:06,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-07 05:17:06,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-07 05:17:06,757 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2020-11-07 05:17:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:17:06,936 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-11-07 05:17:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-07 05:17:06,938 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-11-07 05:17:06,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:17:06,946 INFO L225 Difference]: With dead ends: 64 [2020-11-07 05:17:06,947 INFO L226 Difference]: Without dead ends: 35 [2020-11-07 05:17:06,950 INFO L677 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 [2020-11-07 05:17:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-07 05:17:06,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-07 05:17:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-07 05:17:07,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-11-07 05:17:07,004 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2020-11-07 05:17:07,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:17:07,005 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-11-07 05:17:07,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-07 05:17:07,005 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-11-07 05:17:07,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-07 05:17:07,006 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:17:07,006 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] [2020-11-07 05:17:07,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 05:17:07,009 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:17:07,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:17:07,012 INFO L82 PathProgramCache]: Analyzing trace with hash 329830933, now seen corresponding path program 1 times [2020-11-07 05:17:07,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:17:07,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622626513] [2020-11-07 05:17:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:17:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:07,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:17:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:17:07,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622626513] [2020-11-07 05:17:07,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:17:07,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 05:17:07,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889108371] [2020-11-07 05:17:07,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 05:17:07,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:17:07,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 05:17:07,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-07 05:17:07,212 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 7 states. [2020-11-07 05:17:07,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:17:07,457 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-11-07 05:17:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 05:17:07,458 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-11-07 05:17:07,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:17:07,461 INFO L225 Difference]: With dead ends: 58 [2020-11-07 05:17:07,461 INFO L226 Difference]: Without dead ends: 47 [2020-11-07 05:17:07,463 INFO L677 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 [2020-11-07 05:17:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-07 05:17:07,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2020-11-07 05:17:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-07 05:17:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-11-07 05:17:07,476 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2020-11-07 05:17:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:17:07,477 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-11-07 05:17:07,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 05:17:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-11-07 05:17:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-07 05:17:07,478 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:17:07,479 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] [2020-11-07 05:17:07,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 05:17:07,479 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:17:07,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:17:07,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1355596363, now seen corresponding path program 1 times [2020-11-07 05:17:07,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:17:07,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398925877] [2020-11-07 05:17:07,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:17:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:07,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:17:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:17:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:17:07,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398925877] [2020-11-07 05:17:07,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:17:07,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 05:17:07,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648919027] [2020-11-07 05:17:07,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 05:17:07,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:17:07,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 05:17:07,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-11-07 05:17:07,658 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 9 states. [2020-11-07 05:17:07,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:17:07,896 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-11-07 05:17:07,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 05:17:07,897 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-11-07 05:17:07,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:17:07,899 INFO L225 Difference]: With dead ends: 48 [2020-11-07 05:17:07,899 INFO L226 Difference]: Without dead ends: 33 [2020-11-07 05:17:07,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-11-07 05:17:07,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-07 05:17:07,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-07 05:17:07,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-07 05:17:07,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 32 transitions. [2020-11-07 05:17:07,911 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 32 transitions. Word has length 32 [2020-11-07 05:17:07,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:17:07,911 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 32 transitions. [2020-11-07 05:17:07,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 05:17:07,912 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 32 transitions. [2020-11-07 05:17:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-07 05:17:07,913 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:17:07,913 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] [2020-11-07 05:17:07,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 05:17:07,913 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:17:07,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:17:07,914 INFO L82 PathProgramCache]: Analyzing trace with hash -959156811, now seen corresponding path program 1 times [2020-11-07 05:17:07,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:17:07,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193079607] [2020-11-07 05:17:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:17:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:17:07,937 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:17:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:17:07,956 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:17:07,996 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 05:17:07,996 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 05:17:07,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 05:17:08,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 05:17:08 BoogieIcfgContainer [2020-11-07 05:17:08,043 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 05:17:08,046 INFO L168 Benchmark]: Toolchain (without parser) took 2585.29 ms. Allocated memory was 161.5 MB in the beginning and 200.3 MB in the end (delta: 38.8 MB). Free memory was 138.1 MB in the beginning and 151.2 MB in the end (delta: -13.1 MB). Peak memory consumption was 26.0 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:08,047 INFO L168 Benchmark]: CDTParser took 1.03 ms. Allocated memory is still 161.5 MB. Free memory is still 136.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 05:17:08,048 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.20 ms. Allocated memory is still 161.5 MB. Free memory was 137.5 MB in the beginning and 128.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:08,049 INFO L168 Benchmark]: Boogie Preprocessor took 36.42 ms. Allocated memory is still 161.5 MB. Free memory was 128.2 MB in the beginning and 126.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:08,050 INFO L168 Benchmark]: RCFGBuilder took 473.51 ms. Allocated memory is still 161.5 MB. Free memory was 126.7 MB in the beginning and 110.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-11-07 05:17:08,051 INFO L168 Benchmark]: TraceAbstraction took 1811.04 ms. Allocated memory was 161.5 MB in the beginning and 200.3 MB in the end (delta: 38.8 MB). Free memory was 110.4 MB in the beginning and 151.2 MB in the end (delta: -40.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 05:17:08,055 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.03 ms. Allocated memory is still 161.5 MB. Free memory is still 136.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.20 ms. Allocated memory is still 161.5 MB. Free memory was 137.5 MB in the beginning and 128.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.42 ms. Allocated memory is still 161.5 MB. Free memory was 128.2 MB in the beginning and 126.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 473.51 ms. Allocated memory is still 161.5 MB. Free memory was 126.7 MB in the beginning and 110.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1811.04 ms. Allocated memory was 161.5 MB in the beginning and 200.3 MB in the end (delta: 38.8 MB). Free memory was 110.4 MB in the beginning and 151.2 MB in the end (delta: -40.8 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] struct dummy d1, d2; VAL [d1={9:0}, d2={3:0}] [L15] int n = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=0, d1={9:0}, d2={3:0}, n=0] [L16] EXPR n ? &d1 : &d2 VAL [d1={9:0}, d2={3:0}, n=0, n ? &d1 : &d2={3:0}] [L16] struct dummy *pd = n ? &d1 : &d2; VAL [d1={9:0}, d2={3:0}, n=0, n ? &d1 : &d2={3:0}, pd={3:0}] [L17] COND TRUE pd == &d2 VAL [d1={9:0}, d2={3:0}, n=0, pd={3:0}] [L18] pd->a = 0 VAL [d1={9:0}, d2={3:0}, n=0, pd={3:0}] [L22] pd == &d2 && d2.b != 0 VAL [d1={9:0}, d2={3:0}, n=0, pd={3:0}, pd == &d2 && d2.b != 0=1] [L22] EXPR d2.b VAL [d1={9:0}, d2={3:0}, d2.b=52, n=0, pd={3:0}, pd == &d2 && d2.b != 0=1] [L22] pd == &d2 && d2.b != 0 VAL [d1={9:0}, d2={3:0}, d2.b=52, n=0, pd={3:0}, pd == &d2 && d2.b != 0=1] [L22] COND TRUE pd == &d2 && d2.b != 0 VAL [d1={9:0}, d2={3:0}, d2.b=52, n=0, pd={3:0}, pd == &d2 && d2.b != 0=1] [L28] CALL reach_error() [L3] __assert_fail("0", "test28-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 125 SDslu, 230 SDs, 0 SdLazy, 201 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred 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, 3 MinimizatonAttempts, 9 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 7165 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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...