/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/bitvector-loops/diamond_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 00:35:52,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 00:35:52,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 00:35:52,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 00:35:52,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 00:35:52,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 00:35:52,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 00:35:52,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 00:35:52,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 00:35:52,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 00:35:52,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 00:35:52,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 00:35:52,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 00:35:52,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 00:35:52,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 00:35:52,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 00:35:52,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 00:35:52,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 00:35:52,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 00:35:52,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 00:35:52,278 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 00:35:52,301 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 00:35:52,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 00:35:52,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 00:35:52,305 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 00:35:52,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 00:35:52,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 00:35:52,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 00:35:52,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 00:35:52,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 00:35:52,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 00:35:52,308 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 00:35:52,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 00:35:52,309 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 00:35:52,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 00:35:52,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 00:35:52,310 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 00:35:52,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 00:35:52,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 00:35:52,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 00:35:52,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 00:35:52,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 00:35:52,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 00:35:52,311 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 00:35:52,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 00:35:52,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 00:35:52,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 00:35:52,764 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 00:35:52,765 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 00:35:52,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-10-24 00:35:52,854 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a570ddf26/c94e57ce0a624063846e9fdf9a158eec/FLAG8cb1903c1 [2020-10-24 00:35:53,526 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 00:35:53,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-10-24 00:35:53,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a570ddf26/c94e57ce0a624063846e9fdf9a158eec/FLAG8cb1903c1 [2020-10-24 00:35:53,938 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a570ddf26/c94e57ce0a624063846e9fdf9a158eec [2020-10-24 00:35:53,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 00:35:53,951 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 00:35:53,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 00:35:53,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 00:35:53,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 00:35:53,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:35:53" (1/1) ... [2020-10-24 00:35:53,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dd4ab53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:53, skipping insertion in model container [2020-10-24 00:35:53,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:35:53" (1/1) ... [2020-10-24 00:35:53,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 00:35:53,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 00:35:54,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:35:54,269 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 00:35:54,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:35:54,308 INFO L208 MainTranslator]: Completed translation [2020-10-24 00:35:54,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:54 WrapperNode [2020-10-24 00:35:54,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 00:35:54,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 00:35:54,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 00:35:54,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 00:35:54,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:54" (1/1) ... [2020-10-24 00:35:54,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:54" (1/1) ... [2020-10-24 00:35:54,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:54" (1/1) ... [2020-10-24 00:35:54,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:54" (1/1) ... [2020-10-24 00:35:54,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:54" (1/1) ... [2020-10-24 00:35:54,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:54" (1/1) ... [2020-10-24 00:35:54,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:54" (1/1) ... [2020-10-24 00:35:54,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 00:35:54,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 00:35:54,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 00:35:54,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 00:35:54,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 00:35:54,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 00:35:54,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 00:35:54,430 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 00:35:54,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 00:35:54,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 00:35:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 00:35:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 00:35:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 00:35:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 00:35:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-24 00:35:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 00:35:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 00:35:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 00:35:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 00:35:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 00:35:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 00:35:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 00:35:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 00:35:54,852 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 00:35:54,852 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 00:35:54,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:35:54 BoogieIcfgContainer [2020-10-24 00:35:54,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 00:35:54,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 00:35:54,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 00:35:54,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 00:35:54,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:35:53" (1/3) ... [2020-10-24 00:35:54,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77be4ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:35:54, skipping insertion in model container [2020-10-24 00:35:54,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:35:54" (2/3) ... [2020-10-24 00:35:54,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77be4ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:35:54, skipping insertion in model container [2020-10-24 00:35:54,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:35:54" (3/3) ... [2020-10-24 00:35:54,863 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-10-24 00:35:54,875 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 00:35:54,880 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 00:35:54,894 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 00:35:54,918 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 00:35:54,918 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 00:35:54,919 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 00:35:54,919 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 00:35:54,919 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 00:35:54,919 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 00:35:54,919 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 00:35:54,919 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 00:35:54,935 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-10-24 00:35:54,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-24 00:35:54,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:35:54,946 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] [2020-10-24 00:35:54,946 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:35:54,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:35:54,959 INFO L82 PathProgramCache]: Analyzing trace with hash 2057954194, now seen corresponding path program 1 times [2020-10-24 00:35:54,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:35:54,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337034505] [2020-10-24 00:35:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:35:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:35:55,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:35:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:35:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:35:55,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337034505] [2020-10-24 00:35:55,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:35:55,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 00:35:55,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092100198] [2020-10-24 00:35:55,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 00:35:55,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:35:55,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 00:35:55,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 00:35:55,401 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 3 states. [2020-10-24 00:35:55,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:35:55,570 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2020-10-24 00:35:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 00:35:55,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-24 00:35:55,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:35:55,585 INFO L225 Difference]: With dead ends: 75 [2020-10-24 00:35:55,585 INFO L226 Difference]: Without dead ends: 54 [2020-10-24 00:35:55,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 00:35:55,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-24 00:35:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-24 00:35:55,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-24 00:35:55,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-10-24 00:35:55,683 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 21 [2020-10-24 00:35:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:35:55,685 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-10-24 00:35:55,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 00:35:55,687 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-10-24 00:35:55,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-24 00:35:55,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:35:55,690 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] [2020-10-24 00:35:55,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 00:35:55,691 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:35:55,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:35:55,693 INFO L82 PathProgramCache]: Analyzing trace with hash -404152792, now seen corresponding path program 1 times [2020-10-24 00:35:55,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:35:55,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692279845] [2020-10-24 00:35:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:35:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:35:55,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:35:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:35:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:35:55,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692279845] [2020-10-24 00:35:55,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:35:55,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:35:55,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220656528] [2020-10-24 00:35:55,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:35:55,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:35:55,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:35:55,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:35:55,915 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 4 states. [2020-10-24 00:35:56,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:35:56,190 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-10-24 00:35:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:35:56,190 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-24 00:35:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:35:56,192 INFO L225 Difference]: With dead ends: 65 [2020-10-24 00:35:56,193 INFO L226 Difference]: Without dead ends: 59 [2020-10-24 00:35:56,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 00:35:56,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-24 00:35:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-10-24 00:35:56,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-24 00:35:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-24 00:35:56,210 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 21 [2020-10-24 00:35:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:35:56,211 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-24 00:35:56,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:35:56,211 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-24 00:35:56,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-24 00:35:56,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:35:56,213 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] [2020-10-24 00:35:56,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 00:35:56,213 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:35:56,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:35:56,214 INFO L82 PathProgramCache]: Analyzing trace with hash 507958482, now seen corresponding path program 1 times [2020-10-24 00:35:56,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:35:56,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812475332] [2020-10-24 00:35:56,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:35:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:35:56,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:35:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:35:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 00:35:56,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812475332] [2020-10-24 00:35:56,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 00:35:56,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 00:35:56,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787817790] [2020-10-24 00:35:56,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 00:35:56,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:35:56,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 00:35:56,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 00:35:56,328 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 4 states. [2020-10-24 00:35:56,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:35:56,618 INFO L93 Difference]: Finished difference Result 106 states and 137 transitions. [2020-10-24 00:35:56,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 00:35:56,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-24 00:35:56,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:35:56,622 INFO L225 Difference]: With dead ends: 106 [2020-10-24 00:35:56,622 INFO L226 Difference]: Without dead ends: 67 [2020-10-24 00:35:56,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 00:35:56,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-24 00:35:56,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-24 00:35:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-24 00:35:56,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2020-10-24 00:35:56,654 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 42 [2020-10-24 00:35:56,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:35:56,654 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2020-10-24 00:35:56,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 00:35:56,655 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2020-10-24 00:35:56,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-24 00:35:56,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:35:56,659 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] [2020-10-24 00:35:56,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 00:35:56,660 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:35:56,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:35:56,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1929474098, now seen corresponding path program 1 times [2020-10-24 00:35:56,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:35:56,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551803848] [2020-10-24 00:35:56,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:35:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 00:35:56,719 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 00:35:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 00:35:56,744 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 00:35:56,781 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 00:35:56,782 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 00:35:56,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 00:35:56,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:35:56 BoogieIcfgContainer [2020-10-24 00:35:56,858 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 00:35:56,860 INFO L168 Benchmark]: Toolchain (without parser) took 2914.52 ms. Allocated memory is still 155.2 MB. Free memory was 131.9 MB in the beginning and 85.3 MB in the end (delta: 46.6 MB). Peak memory consumption was 47.6 MB. Max. memory is 8.0 GB. [2020-10-24 00:35:56,861 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 155.2 MB. Free memory is still 129.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 00:35:56,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.44 ms. Allocated memory is still 155.2 MB. Free memory was 131.2 MB in the beginning and 121.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 00:35:56,863 INFO L168 Benchmark]: Boogie Preprocessor took 40.54 ms. Allocated memory is still 155.2 MB. Free memory was 121.3 MB in the beginning and 119.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 00:35:56,864 INFO L168 Benchmark]: RCFGBuilder took 503.37 ms. Allocated memory is still 155.2 MB. Free memory was 119.8 MB in the beginning and 134.6 MB in the end (delta: -14.7 MB). Peak memory consumption was 18.3 MB. Max. memory is 8.0 GB. [2020-10-24 00:35:56,865 INFO L168 Benchmark]: TraceAbstraction took 2001.87 ms. Allocated memory is still 155.2 MB. Free memory was 134.0 MB in the beginning and 85.3 MB in the end (delta: 48.7 MB). Peak memory consumption was 49.3 MB. Max. memory is 8.0 GB. [2020-10-24 00:35:56,871 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 155.2 MB. Free memory is still 129.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 352.44 ms. Allocated memory is still 155.2 MB. Free memory was 131.2 MB in the beginning and 121.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.54 ms. Allocated memory is still 155.2 MB. Free memory was 121.3 MB in the beginning and 119.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 503.37 ms. Allocated memory is still 155.2 MB. Free memory was 119.8 MB in the beginning and 134.6 MB in the end (delta: -14.7 MB). Peak memory consumption was 18.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2001.87 ms. Allocated memory is still 155.2 MB. Free memory was 134.0 MB in the beginning and 85.3 MB in the end (delta: 48.7 MB). Peak memory consumption was 49.3 MB. 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] unsigned int x = 0; VAL [x=0] [L15] unsigned int y = __VERIFIER_nondet_uint(); VAL [__VERIFIER_nondet_uint()=-1, x=0, y=4294967295] [L17] COND TRUE x < 99 VAL [x=0, y=4294967295] [L18] COND FALSE !(y % 2 == 0) VAL [x=0, y=4294967295] [L19] x += 2 VAL [x=2, y=4294967295] [L21] COND FALSE !(y % 2 == 0) VAL [x=2, y=4294967295] [L22] x -= 2 VAL [x=0, y=4294967295] [L24] COND FALSE !(y % 2 == 0) VAL [x=0, y=4294967295] [L25] x += 2 VAL [x=2, y=4294967295] [L27] COND FALSE !(y % 2 == 0) VAL [x=2, y=4294967295] [L28] x -= 2 VAL [x=0, y=4294967295] [L30] COND FALSE !(y % 2 == 0) VAL [x=0, y=4294967295] [L31] x += 2 VAL [x=2, y=4294967295] [L33] COND FALSE !(y % 2 == 0) VAL [x=2, y=4294967295] [L34] x -= 4 VAL [x=4294967294, y=4294967295] [L36] COND FALSE !(y % 2 == 0) VAL [x=4294967294, y=4294967295] [L37] x += 4 VAL [x=2, y=4294967295] [L39] COND FALSE !(y % 2 == 0) VAL [x=2, y=4294967295] [L40] x += 2 VAL [x=4, y=4294967295] [L42] COND FALSE !(y % 2 == 0) VAL [x=4, y=4294967295] [L43] x -= 4 VAL [x=0, y=4294967295] [L45] COND FALSE !(y % 2 == 0) VAL [x=0, y=4294967295] [L46] x -= 4 VAL [x=4294967292, y=4294967295] [L17] COND FALSE !(x < 99) VAL [x=4294967292, y=4294967295] [L49] CALL __VERIFIER_assert((x % 2) == (y % 2)) VAL [\old(cond)=0] [L7] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L8] CALL reach_error() [L3] __assert_fail("0", "diamond_2-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 63 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 186 SDtfs, 192 SDslu, 38 SDs, 0 SdLazy, 113 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 81 ConstructedInterpolants, 0 QuantifiedInterpolants, 5605 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 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...