/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/gcnr2008.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:05:25,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:05:25,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:05:25,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 23:05:25,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:05:25,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:05:25,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:05:25,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:05:25,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:05:25,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:05:25,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:05:25,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:05:25,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:05:25,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:05:25,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:05:25,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:05:25,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:05:25,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:05:25,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:05:25,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:05:25,518 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 23:05:25,539 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:05:25,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:05:25,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:05:25,544 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:05:25,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:05:25,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:05:25,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:05:25,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:05:25,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:05:25,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:05:25,546 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:05:25,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:05:25,547 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:05:25,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:05:25,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:05:25,548 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:05:25,548 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:05:25,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:05:25,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:05:25,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:05:25,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:05:25,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:05:25,550 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 23:05:25,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:05:25,939 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:05:25,946 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:05:25,949 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:05:25,949 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:05:25,950 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gcnr2008.i [2020-08-22 23:05:26,040 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e853a412/fa4050ec41c34728a8812803fb92a4d2/FLAGbaf4a7446 [2020-08-22 23:05:26,557 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:05:26,559 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gcnr2008.i [2020-08-22 23:05:26,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e853a412/fa4050ec41c34728a8812803fb92a4d2/FLAGbaf4a7446 [2020-08-22 23:05:26,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e853a412/fa4050ec41c34728a8812803fb92a4d2 [2020-08-22 23:05:26,903 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:05:26,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:05:26,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:05:26,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:05:26,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:05:26,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:05:26" (1/1) ... [2020-08-22 23:05:26,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70996f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:26, skipping insertion in model container [2020-08-22 23:05:26,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:05:26" (1/1) ... [2020-08-22 23:05:26,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:05:26,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:05:27,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:05:27,157 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:05:27,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:05:27,196 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:05:27,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:27 WrapperNode [2020-08-22 23:05:27,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:05:27,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:05:27,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:05:27,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:05:27,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:27" (1/1) ... [2020-08-22 23:05:27,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:27" (1/1) ... [2020-08-22 23:05:27,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:27" (1/1) ... [2020-08-22 23:05:27,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:27" (1/1) ... [2020-08-22 23:05:27,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:27" (1/1) ... [2020-08-22 23:05:27,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:27" (1/1) ... [2020-08-22 23:05:27,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:27" (1/1) ... [2020-08-22 23:05:27,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:05:27,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:05:27,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:05:27,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:05:27,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:27" (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 [2020-08-22 23:05:27,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:05:27,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:05:27,436 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:05:27,436 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:05:27,436 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:05:27,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:05:27,436 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:05:27,436 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:05:27,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:05:27,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:05:27,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:05:27,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:05:27,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:05:27,713 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:05:27,713 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:05:27,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:05:27 BoogieIcfgContainer [2020-08-22 23:05:27,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:05:27,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:05:27,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:05:27,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:05:27,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:05:26" (1/3) ... [2020-08-22 23:05:27,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721f7eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:05:27, skipping insertion in model container [2020-08-22 23:05:27,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:27" (2/3) ... [2020-08-22 23:05:27,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721f7eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:05:27, skipping insertion in model container [2020-08-22 23:05:27,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:05:27" (3/3) ... [2020-08-22 23:05:27,734 INFO L109 eAbstractionObserver]: Analyzing ICFG gcnr2008.i [2020-08-22 23:05:27,757 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:05:27,772 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:05:27,797 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:05:27,829 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:05:27,829 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:05:27,830 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:05:27,830 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:05:27,830 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:05:27,831 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:05:27,831 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:05:27,831 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:05:27,853 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-08-22 23:05:27,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 23:05:27,867 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:27,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:27,869 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:27,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:27,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1056406919, now seen corresponding path program 1 times [2020-08-22 23:05:27,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:27,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047113471] [2020-08-22 23:05:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:28,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047113471] [2020-08-22 23:05:28,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:05:28,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 23:05:28,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319234867] [2020-08-22 23:05:28,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 23:05:28,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:28,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 23:05:28,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:05:28,061 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2020-08-22 23:05:28,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:28,099 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-08-22 23:05:28,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 23:05:28,101 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-08-22 23:05:28,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:28,115 INFO L225 Difference]: With dead ends: 57 [2020-08-22 23:05:28,115 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 23:05:28,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:05:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 23:05:28,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-08-22 23:05:28,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 23:05:28,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-22 23:05:28,179 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 17 [2020-08-22 23:05:28,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:28,180 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-22 23:05:28,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 23:05:28,180 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-22 23:05:28,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 23:05:28,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:28,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:28,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:05:28,182 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:28,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:28,183 INFO L82 PathProgramCache]: Analyzing trace with hash -588270500, now seen corresponding path program 1 times [2020-08-22 23:05:28,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:28,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020362674] [2020-08-22 23:05:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:05:28,233 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:05:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:05:28,253 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:05:28,276 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 23:05:28,277 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 23:05:28,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:05:28,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:05:28 BoogieIcfgContainer [2020-08-22 23:05:28,312 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:05:28,316 INFO L168 Benchmark]: Toolchain (without parser) took 1409.79 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 106.7 MB in the beginning and 145.6 MB in the end (delta: -38.9 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:28,317 INFO L168 Benchmark]: CDTParser took 2.06 ms. Allocated memory is still 148.9 MB. Free memory was 124.5 MB in the beginning and 124.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 23:05:28,319 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.84 ms. Allocated memory is still 148.9 MB. Free memory was 106.5 MB in the beginning and 97.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:28,320 INFO L168 Benchmark]: Boogie Preprocessor took 39.57 ms. Allocated memory is still 148.9 MB. Free memory was 97.0 MB in the beginning and 95.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:28,321 INFO L168 Benchmark]: RCFGBuilder took 480.96 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 95.2 MB in the beginning and 169.2 MB in the end (delta: -73.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:28,322 INFO L168 Benchmark]: TraceAbstraction took 591.43 ms. Allocated memory is still 205.0 MB. Free memory was 168.5 MB in the beginning and 145.6 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:28,327 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.06 ms. Allocated memory is still 148.9 MB. Free memory was 124.5 MB in the beginning and 124.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 289.84 ms. Allocated memory is still 148.9 MB. Free memory was 106.5 MB in the beginning and 97.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.57 ms. Allocated memory is still 148.9 MB. Free memory was 97.0 MB in the beginning and 95.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 480.96 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 95.2 MB in the beginning and 169.2 MB in the end (delta: -73.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 591.43 ms. Allocated memory is still 205.0 MB. Free memory was 168.5 MB in the beginning and 145.6 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int x,y,z,w; [L15] EXPR w = 0 VAL [w=0] [L15] EXPR z = w = 0 VAL [w=0, z=0] [L15] EXPR y = z = w = 0 VAL [w=0, y=0, z=0] [L15] x = y = z = w = 0 VAL [w=0, x=0, y=0, z=0] [L16] COND FALSE !(__VERIFIER_nondet_int() && y < 10000) VAL [__VERIFIER_nondet_int()=0, w=0, x=0, y=0, z=0] [L31] CALL __VERIFIER_assert(x >= 4 && y <= 2) VAL [\old(cond)=0] [L7] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L8] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 49 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 256 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...