/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:50:45,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:50:45,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:50:45,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:50:45,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:50:45,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:50:45,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:50:45,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:50:45,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:50:45,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:50:45,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:50:45,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:50:45,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:50:45,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:50:45,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:50:45,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:50:45,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:50:45,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:50:45,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:50:45,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:50:45,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:50:45,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:50:45,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:50:45,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:50:45,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:50:45,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:50:45,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:50:45,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:50:45,957 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 19:50:45,970 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:50:45,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:50:45,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:50:45,973 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:50:45,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:50:45,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:50:45,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:50:45,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:50:45,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:50:45,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:50:45,975 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:50:45,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:50:45,976 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:50:45,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:50:45,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:50:45,977 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:50:45,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:50:45,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:50:45,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:50:45,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:50:45,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:50:45,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:50:45,978 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:50:46,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:50:46,295 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:50:46,300 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:50:46,302 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:50:46,303 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:50:46,304 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2020-08-22 19:50:46,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60ecb8c8e/a0032c4201534dd79d8a3746a404f81b/FLAG06948a907 [2020-08-22 19:50:46,911 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:50:46,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps2.c [2020-08-22 19:50:46,918 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60ecb8c8e/a0032c4201534dd79d8a3746a404f81b/FLAG06948a907 [2020-08-22 19:50:47,279 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60ecb8c8e/a0032c4201534dd79d8a3746a404f81b [2020-08-22 19:50:47,290 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:50:47,291 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:50:47,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:50:47,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:50:47,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:50:47,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:50:47" (1/1) ... [2020-08-22 19:50:47,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2082f3b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:47, skipping insertion in model container [2020-08-22 19:50:47,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:50:47" (1/1) ... [2020-08-22 19:50:47,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:50:47,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:50:47,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:50:47,517 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:50:47,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:50:47,556 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:50:47,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:47 WrapperNode [2020-08-22 19:50:47,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:50:47,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:50:47,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:50:47,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:50:47,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:47" (1/1) ... [2020-08-22 19:50:47,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:47" (1/1) ... [2020-08-22 19:50:47,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:47" (1/1) ... [2020-08-22 19:50:47,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:47" (1/1) ... [2020-08-22 19:50:47,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:47" (1/1) ... [2020-08-22 19:50:47,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:47" (1/1) ... [2020-08-22 19:50:47,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:47" (1/1) ... [2020-08-22 19:50:47,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:50:47,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:50:47,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:50:47,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:50:47,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:47" (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 19:50:47,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:50:47,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:50:47,742 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:50:47,742 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:50:47,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:50:47,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:50:47,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:50:47,742 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:50:47,742 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:50:47,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:50:47,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:50:47,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:50:47,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:50:47,951 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:50:47,952 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:50:47,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:50:47 BoogieIcfgContainer [2020-08-22 19:50:47,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:50:47,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:50:47,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:50:47,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:50:47,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:50:47" (1/3) ... [2020-08-22 19:50:47,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d20dc64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:50:47, skipping insertion in model container [2020-08-22 19:50:47,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:47" (2/3) ... [2020-08-22 19:50:47,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d20dc64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:50:47, skipping insertion in model container [2020-08-22 19:50:47,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:50:47" (3/3) ... [2020-08-22 19:50:47,966 INFO L109 eAbstractionObserver]: Analyzing ICFG ps2.c [2020-08-22 19:50:47,979 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:50:47,991 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:50:48,042 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:50:48,094 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:50:48,094 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:50:48,095 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:50:48,098 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:50:48,098 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:50:48,098 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:50:48,098 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:50:48,098 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:50:48,111 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-08-22 19:50:48,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 19:50:48,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:48,123 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 19:50:48,123 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:48,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:48,130 INFO L82 PathProgramCache]: Analyzing trace with hash 41942830, now seen corresponding path program 1 times [2020-08-22 19:50:48,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:48,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186849271] [2020-08-22 19:50:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:48,192 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:48,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:48,264 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 19:50:48,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186849271] [2020-08-22 19:50:48,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:48,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 19:50:48,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559817628] [2020-08-22 19:50:48,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 19:50:48,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:48,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 19:50:48,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:50:48,287 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-08-22 19:50:48,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:48,313 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-08-22 19:50:48,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 19:50:48,315 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-08-22 19:50:48,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:48,324 INFO L225 Difference]: With dead ends: 50 [2020-08-22 19:50:48,324 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 19:50:48,328 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 19:50:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 19:50:48,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 19:50:48,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 19:50:48,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 19:50:48,373 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2020-08-22 19:50:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:48,374 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 19:50:48,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 19:50:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 19:50:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 19:50:48,375 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:48,376 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 19:50:48,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:50:48,377 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:48,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:48,380 INFO L82 PathProgramCache]: Analyzing trace with hash 31724517, now seen corresponding path program 1 times [2020-08-22 19:50:48,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:48,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824632582] [2020-08-22 19:50:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:48,384 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:48,399 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-22 19:50:48,399 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 19:50:48,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:50:48,418 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-22 19:50:48,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:50:48 BoogieIcfgContainer [2020-08-22 19:50:48,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:50:48,422 INFO L168 Benchmark]: Toolchain (without parser) took 1129.43 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 102.8 MB in the beginning and 145.9 MB in the end (delta: -43.1 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:48,423 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.0 MB. Free memory was 121.3 MB in the beginning and 120.8 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-22 19:50:48,424 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.11 ms. Allocated memory is still 140.0 MB. Free memory was 102.4 MB in the beginning and 92.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:48,425 INFO L168 Benchmark]: Boogie Preprocessor took 117.41 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 92.5 MB in the beginning and 181.9 MB in the end (delta: -89.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:48,426 INFO L168 Benchmark]: RCFGBuilder took 281.91 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 168.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:48,427 INFO L168 Benchmark]: TraceAbstraction took 460.72 ms. Allocated memory is still 203.4 MB. Free memory was 167.8 MB in the beginning and 145.9 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:48,431 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.0 MB. Free memory was 121.3 MB in the beginning and 120.8 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.11 ms. Allocated memory is still 140.0 MB. Free memory was 102.4 MB in the beginning and 92.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.41 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 92.5 MB in the beginning and 181.9 MB in the end (delta: -89.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 281.91 ms. Allocated memory is still 203.4 MB. Free memory was 181.9 MB in the beginning and 168.7 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 460.72 ms. Allocated memory is still 203.4 MB. Free memory was 167.8 MB in the beginning and 145.9 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L16] int k, y, x, c; [L17] k = __VERIFIER_nondet_int() [L19] y = 0 [L20] x = 0 [L21] c = 0 [L23] COND TRUE 1 [L24] CALL __VERIFIER_assert((y * y) - 2 * x + y == 0) [L8] COND TRUE !(cond) [L10] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 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=32occurred 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: 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...