/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invariants/eq2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:03:36,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:03:36,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:03:36,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 22:03:36,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:03:36,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:03:36,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:03:36,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 22:03:36,755 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:03:36,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:03:36,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:03:36,760 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:03:36,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:03:36,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:03:36,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:03:36,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:03:36,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:03:36,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:03:36,763 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:03:36,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:03:36,763 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:03:36,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:03:36,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:03:36,764 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:03:36,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:03:36,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:03:36,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:03:36,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:03:36,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:03:36,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:03:36,765 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:03:37,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:03:37,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:03:37,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:03:37,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:03:37,263 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:03:37,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq2.c [2020-10-23 22:03:37,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1954584b4/70e9b20283b0459fb1e86718a4237cdf/FLAG6527e9f5c [2020-10-23 22:03:38,097 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:03:38,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq2.c [2020-10-23 22:03:38,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1954584b4/70e9b20283b0459fb1e86718a4237cdf/FLAG6527e9f5c [2020-10-23 22:03:38,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1954584b4/70e9b20283b0459fb1e86718a4237cdf [2020-10-23 22:03:38,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:03:38,462 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:03:38,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:03:38,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:03:38,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:03:38,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:03:38" (1/1) ... [2020-10-23 22:03:38,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5028439f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:38, skipping insertion in model container [2020-10-23 22:03:38,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:03:38" (1/1) ... [2020-10-23 22:03:38,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:03:38,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:03:38,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:03:38,660 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:03:38,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:03:38,699 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:03:38,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:38 WrapperNode [2020-10-23 22:03:38,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:03:38,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:03:38,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:03:38,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:03:38,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:38" (1/1) ... [2020-10-23 22:03:38,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:38" (1/1) ... [2020-10-23 22:03:38,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:38" (1/1) ... [2020-10-23 22:03:38,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:38" (1/1) ... [2020-10-23 22:03:38,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:38" (1/1) ... [2020-10-23 22:03:38,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:38" (1/1) ... [2020-10-23 22:03:38,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:38" (1/1) ... [2020-10-23 22:03:38,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:03:38,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:03:38,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:03:38,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:03:38,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:03:38,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:03:38,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:03:38,833 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:03:38,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 22:03:38,833 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:03:38,833 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:03:38,833 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:03:38,834 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:03:38,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:03:38,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 22:03:38,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 22:03:38,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:03:38,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:03:38,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:03:38,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:03:38,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:03:38,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:03:38,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:03:39,412 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:03:39,413 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 22:03:39,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:03:39 BoogieIcfgContainer [2020-10-23 22:03:39,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:03:39,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:03:39,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:03:39,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:03:39,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:03:38" (1/3) ... [2020-10-23 22:03:39,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b73a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:03:39, skipping insertion in model container [2020-10-23 22:03:39,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:03:38" (2/3) ... [2020-10-23 22:03:39,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b73a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:03:39, skipping insertion in model container [2020-10-23 22:03:39,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:03:39" (3/3) ... [2020-10-23 22:03:39,431 INFO L111 eAbstractionObserver]: Analyzing ICFG eq2.c [2020-10-23 22:03:39,444 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:03:39,449 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:03:39,467 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:03:39,510 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:03:39,511 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:03:39,511 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:03:39,511 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:03:39,511 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:03:39,511 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:03:39,511 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:03:39,512 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:03:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-10-23 22:03:39,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 22:03:39,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:39,571 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] [2020-10-23 22:03:39,572 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:39,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1510263874, now seen corresponding path program 1 times [2020-10-23 22:03:39,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:39,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759373509] [2020-10-23 22:03:39,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:39,695 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:39,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:03:39,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759373509] [2020-10-23 22:03:39,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:39,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 22:03:39,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644904964] [2020-10-23 22:03:39,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 22:03:39,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:40,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 22:03:40,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 22:03:40,005 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 3 states. [2020-10-23 22:03:40,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:40,142 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2020-10-23 22:03:40,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 22:03:40,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-23 22:03:40,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:40,153 INFO L225 Difference]: With dead ends: 61 [2020-10-23 22:03:40,153 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 22:03:40,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 22:03:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 22:03:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 22:03:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 22:03:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-10-23 22:03:40,208 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 29 [2020-10-23 22:03:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:40,208 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-10-23 22:03:40,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 22:03:40,209 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-10-23 22:03:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 22:03:40,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:40,210 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] [2020-10-23 22:03:40,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:03:40,211 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:40,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:40,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1383064033, now seen corresponding path program 1 times [2020-10-23 22:03:40,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:40,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490503851] [2020-10-23 22:03:40,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:40,216 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:03:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:40,773 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-23 22:03:40,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:03:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:03:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:03:40,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490503851] [2020-10-23 22:03:40,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:03:40,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 22:03:40,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463557674] [2020-10-23 22:03:40,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 22:03:40,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:03:40,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 22:03:40,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 22:03:40,830 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 8 states. [2020-10-23 22:03:41,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:03:41,461 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-23 22:03:41,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 22:03:41,462 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-23 22:03:41,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:03:41,463 INFO L225 Difference]: With dead ends: 49 [2020-10-23 22:03:41,463 INFO L226 Difference]: Without dead ends: 42 [2020-10-23 22:03:41,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-23 22:03:41,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-23 22:03:41,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-23 22:03:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 22:03:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-23 22:03:41,480 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 30 [2020-10-23 22:03:41,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:03:41,480 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-23 22:03:41,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 22:03:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-23 22:03:41,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-23 22:03:41,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:03:41,482 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] [2020-10-23 22:03:41,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:03:41,483 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:03:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:03:41,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1766203427, now seen corresponding path program 1 times [2020-10-23 22:03:41,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:03:41,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766088581] [2020-10-23 22:03:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:03:44,258 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 22:03:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 22:03:44,376 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 22:03:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 22:03:44,423 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 22:03:44,456 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 22:03:44,457 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 22:03:44,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:03:44,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 10:03:44 BoogieIcfgContainer [2020-10-23 22:03:44,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 22:03:44,477 INFO L168 Benchmark]: Toolchain (without parser) took 6019.58 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 128.0 MB in the beginning and 157.9 MB in the end (delta: -29.9 MB). Peak memory consumption was 965.7 kB. Max. memory is 8.0 GB. [2020-10-23 22:03:44,478 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 22:03:44,479 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.56 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 117.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 22:03:44,480 INFO L168 Benchmark]: Boogie Preprocessor took 39.70 ms. Allocated memory is still 151.0 MB. Free memory was 117.6 MB in the beginning and 116.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 22:03:44,481 INFO L168 Benchmark]: RCFGBuilder took 677.58 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 101.8 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-23 22:03:44,482 INFO L168 Benchmark]: TraceAbstraction took 5051.79 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 101.3 MB in the beginning and 157.9 MB in the end (delta: -56.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 22:03:44,486 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 234.56 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 117.6 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.70 ms. Allocated memory is still 151.0 MB. Free memory was 117.6 MB in the beginning and 116.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 677.58 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 101.8 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5051.79 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 101.3 MB in the beginning and 157.9 MB in the end (delta: -56.6 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: [L12] unsigned int w = __VERIFIER_nondet_uint(); [L13] unsigned int x = w; [L14] unsigned int y = w + 1; [L15] unsigned int z = x + 1; [L16] COND TRUE __VERIFIER_nondet_uint() [L17] y++ [L18] z++ [L16] COND FALSE !(__VERIFIER_nondet_uint()) [L20] CALL __VERIFIER_assert(y == z) [L6] COND TRUE !(cond) [L7] CALL reach_error() [L3] __assert_fail("0", "eq2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 78 SDtfs, 75 SDslu, 106 SDs, 0 SdLazy, 107 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s 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, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...