/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/geo3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:50:43,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:50:43,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:50:43,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:50:43,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:50:43,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:50:43,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:50:43,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:50:43,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:50:43,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:50:43,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:50:43,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:50:43,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:50:43,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:50:43,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:50:43,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:50:43,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:50:43,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:50:43,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:50:43,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:50:43,621 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 19:50:43,630 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:50:43,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:50:43,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:50:43,632 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:50:43,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:50:43,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:50:43,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:50:43,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:50:43,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:50:43,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:50:43,633 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:50:43,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:50:43,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:50:43,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:50:43,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:50:43,634 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:50:43,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:50:43,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:50:43,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:50:43,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:50:43,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:50:43,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:50:43,635 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:50:43,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:50:43,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:50:43,956 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:50:43,957 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:50:43,958 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:50:43,959 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo3.c [2020-08-22 19:50:44,037 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a05fd694/94ef21cb7ad7462fa13776bc7a0a52ba/FLAG378ef0f18 [2020-08-22 19:50:44,543 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:50:44,545 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo3.c [2020-08-22 19:50:44,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a05fd694/94ef21cb7ad7462fa13776bc7a0a52ba/FLAG378ef0f18 [2020-08-22 19:50:44,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a05fd694/94ef21cb7ad7462fa13776bc7a0a52ba [2020-08-22 19:50:44,942 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:50:44,944 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:50:44,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:50:44,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:50:44,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:50:44,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:50:44" (1/1) ... [2020-08-22 19:50:44,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6589a4e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:44, skipping insertion in model container [2020-08-22 19:50:44,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:50:44" (1/1) ... [2020-08-22 19:50:44,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:50:44,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:50:45,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:50:45,160 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:50:45,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:50:45,188 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:50:45,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:45 WrapperNode [2020-08-22 19:50:45,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:50:45,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:50:45,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:50:45,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:50:45,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:45" (1/1) ... [2020-08-22 19:50:45,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:45" (1/1) ... [2020-08-22 19:50:45,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:45" (1/1) ... [2020-08-22 19:50:45,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:45" (1/1) ... [2020-08-22 19:50:45,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:45" (1/1) ... [2020-08-22 19:50:45,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:45" (1/1) ... [2020-08-22 19:50:45,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:45" (1/1) ... [2020-08-22 19:50:45,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:50:45,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:50:45,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:50:45,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:50:45,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:45" (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 19:50:45,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:50:45,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:50:45,360 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:50:45,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:50:45,360 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:50:45,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:50:45,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:50:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:50:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:50:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:50:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:50:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:50:45,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:50:45,570 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:50:45,570 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:50:45,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:50:45 BoogieIcfgContainer [2020-08-22 19:50:45,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:50:45,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:50:45,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:50:45,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:50:45,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:50:44" (1/3) ... [2020-08-22 19:50:45,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58623dbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:50:45, skipping insertion in model container [2020-08-22 19:50:45,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:45" (2/3) ... [2020-08-22 19:50:45,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58623dbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:50:45, skipping insertion in model container [2020-08-22 19:50:45,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:50:45" (3/3) ... [2020-08-22 19:50:45,584 INFO L109 eAbstractionObserver]: Analyzing ICFG geo3.c [2020-08-22 19:50:45,596 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:50:45,603 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:50:45,625 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:50:45,663 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:50:45,664 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:50:45,664 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:50:45,664 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:50:45,664 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:50:45,665 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:50:45,665 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:50:45,665 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:50:45,686 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-08-22 19:50:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 19:50:45,700 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:45,702 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] [2020-08-22 19:50:45,702 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:45,710 INFO L82 PathProgramCache]: Analyzing trace with hash 713645626, now seen corresponding path program 1 times [2020-08-22 19:50:45,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:45,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549467061] [2020-08-22 19:50:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:45,799 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:45,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:45,886 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 19:50:45,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549467061] [2020-08-22 19:50:45,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:45,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 19:50:45,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974217662] [2020-08-22 19:50:45,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 19:50:45,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:45,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 19:50:45,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:50:45,915 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-08-22 19:50:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:45,946 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2020-08-22 19:50:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 19:50:45,949 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2020-08-22 19:50:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:45,959 INFO L225 Difference]: With dead ends: 58 [2020-08-22 19:50:45,960 INFO L226 Difference]: Without dead ends: 35 [2020-08-22 19:50:45,964 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 19:50:45,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-22 19:50:46,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-08-22 19:50:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 19:50:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-08-22 19:50:46,022 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 27 [2020-08-22 19:50:46,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:46,023 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-08-22 19:50:46,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 19:50:46,024 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-08-22 19:50:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 19:50:46,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:46,025 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] [2020-08-22 19:50:46,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:50:46,026 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:46,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:46,027 INFO L82 PathProgramCache]: Analyzing trace with hash 703427313, now seen corresponding path program 1 times [2020-08-22 19:50:46,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:46,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477015244] [2020-08-22 19:50:46,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:46,031 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:46,045 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-22 19:50:46,045 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 19:50:46,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:50:46,068 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-22 19:50:46,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:50:46 BoogieIcfgContainer [2020-08-22 19:50:46,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:50:46,072 INFO L168 Benchmark]: Toolchain (without parser) took 1126.94 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 104.4 MB in the beginning and 142.8 MB in the end (delta: -38.5 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:46,074 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:50:46,075 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.19 ms. Allocated memory is still 140.0 MB. Free memory was 104.0 MB in the beginning and 94.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:46,076 INFO L168 Benchmark]: Boogie Preprocessor took 106.15 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 94.0 MB in the beginning and 180.9 MB in the end (delta: -86.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:46,077 INFO L168 Benchmark]: RCFGBuilder took 279.57 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 166.2 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:46,078 INFO L168 Benchmark]: TraceAbstraction took 491.95 ms. Allocated memory is still 202.4 MB. Free memory was 166.2 MB in the beginning and 142.8 MB in the end (delta: 23.4 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:46,083 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.19 ms. Allocated memory is still 140.0 MB. Free memory was 104.0 MB in the beginning and 94.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.15 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 94.0 MB in the beginning and 180.9 MB in the end (delta: -86.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 279.57 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 166.2 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 491.95 ms. Allocated memory is still 202.4 MB. Free memory was 166.2 MB in the beginning and 142.8 MB in the end (delta: 23.4 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: 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: [L20] int z, a, k; [L21] int x, y, c; [L22] z = __VERIFIER_nondet_int() [L23] a = __VERIFIER_nondet_int() [L24] k = __VERIFIER_nondet_int() [L26] x = a [L27] y = 1 [L28] c = 1 [L30] COND TRUE 1 [L31] CALL __VERIFIER_assert(z*x - x + a - a*z*y == 0) [L13] COND TRUE !(cond) [L15] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 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: 41 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=40occurred 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...