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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loops/trex02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:46:10,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:46:10,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:46:10,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 12:46:10,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 12:46:10,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 12:46:10,565 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 12:46:10,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 12:46:10,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 12:46:10,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 12:46:10,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 12:46:10,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-05 12:46:10,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 12:46:10,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 12:46:10,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 12:46:10,575 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 12:46:10,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 12:46:10,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 12:46:10,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 12:46:10,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 12:46:10,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 12:46:10,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 12:46:10,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 12:46:10,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 12:46:10,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 12:46:10,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-05 12:46:10,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-05 12:46:10,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-05 12:46:10,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-05 12:46:10,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-05 12:46:10,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-05 12:46:10,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-05 12:46:10,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-05 12:46:10,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:46:10,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:46:10,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:46:10,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-05 12:46:10,635 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:46:10,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:46:10,636 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-05 12:46:10,636 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-05 12:46:10,637 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-05 12:46:10,637 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-05 12:46:10,637 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-05 12:46:10,637 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-05 12:46:10,638 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-05 12:46:10,638 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-05 12:46:10,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:46:10,640 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:46:10,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:46:10,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:46:10,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:46:10,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:46:10,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:46:10,641 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:46:10,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:46:10,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:46:10,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:46:10,642 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-05 12:46:10,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:46:10,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:46:10,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:46:10,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:46:10,643 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-05 12:46:10,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:46:10,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:46:10,644 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-05 12:46:10,671 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:46:10,683 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:46:10,687 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:46:10,688 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:46:10,688 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:46:10,689 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-2.c [2019-09-05 12:46:10,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8d07e71c/54301bf5e6934bb3bd54b4c8d7f52c45/FLAGa94d49c01 [2019-09-05 12:46:11,169 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:46:11,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-2.c [2019-09-05 12:46:11,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8d07e71c/54301bf5e6934bb3bd54b4c8d7f52c45/FLAGa94d49c01 [2019-09-05 12:46:11,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8d07e71c/54301bf5e6934bb3bd54b4c8d7f52c45 [2019-09-05 12:46:11,572 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:46:11,574 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:46:11,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:46:11,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:46:11,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:46:11,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:46:11" (1/1) ... [2019-09-05 12:46:11,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1514fdfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:11, skipping insertion in model container [2019-09-05 12:46:11,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:46:11" (1/1) ... [2019-09-05 12:46:11,592 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:46:11,612 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:46:11,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:46:11,817 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:46:11,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:46:11,848 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:46:11,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:11 WrapperNode [2019-09-05 12:46:11,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:46:11,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:46:11,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:46:11,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:46:11,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:11" (1/1) ... [2019-09-05 12:46:11,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:11" (1/1) ... [2019-09-05 12:46:11,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:11" (1/1) ... [2019-09-05 12:46:11,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:11" (1/1) ... [2019-09-05 12:46:11,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:11" (1/1) ... [2019-09-05 12:46:11,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:11" (1/1) ... [2019-09-05 12:46:11,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:11" (1/1) ... [2019-09-05 12:46:11,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:46:11,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:46:11,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:46:11,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:46:11,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:11" (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 [2019-09-05 12:46:12,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:46:12,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:46:12,032 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 12:46:12,032 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-09-05 12:46:12,032 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:46:12,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:46:12,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:46:12,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-09-05 12:46:12,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 12:46:12,033 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-09-05 12:46:12,033 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:46:12,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:46:12,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:46:12,223 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:46:12,224 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 12:46:12,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:46:12 BoogieIcfgContainer [2019-09-05 12:46:12,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:46:12,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:46:12,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:46:12,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:46:12,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:46:11" (1/3) ... [2019-09-05 12:46:12,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67020312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:46:12, skipping insertion in model container [2019-09-05 12:46:12,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:11" (2/3) ... [2019-09-05 12:46:12,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67020312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:46:12, skipping insertion in model container [2019-09-05 12:46:12,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:46:12" (3/3) ... [2019-09-05 12:46:12,256 INFO L109 eAbstractionObserver]: Analyzing ICFG trex02-2.c [2019-09-05 12:46:12,274 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:46:12,284 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:46:12,307 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:46:12,373 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:46:12,373 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-05 12:46:12,373 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:46:12,374 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:46:12,374 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:46:12,374 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:46:12,374 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:46:12,374 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:46:12,392 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-09-05 12:46:12,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-05 12:46:12,403 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:12,405 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:12,409 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:12,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:12,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1873481772, now seen corresponding path program 1 times [2019-09-05 12:46:12,419 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:12,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:12,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:12,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:12,469 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:12,540 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:46:12,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 12:46:12,540 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:12,544 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:46:12,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:46:12,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:46:12,562 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2019-09-05 12:46:12,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:12,580 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2019-09-05 12:46:12,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:46:12,582 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-09-05 12:46:12,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:12,595 INFO L225 Difference]: With dead ends: 24 [2019-09-05 12:46:12,595 INFO L226 Difference]: Without dead ends: 18 [2019-09-05 12:46:12,597 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:46:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-05 12:46:12,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-05 12:46:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-05 12:46:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-09-05 12:46:12,641 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2019-09-05 12:46:12,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:12,642 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-09-05 12:46:12,642 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:46:12,642 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-09-05 12:46:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-05 12:46:12,644 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:12,644 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:12,644 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:12,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1862399520, now seen corresponding path program 1 times [2019-09-05 12:46:12,645 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:12,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:12,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:12,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:12,647 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-05 12:46:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-05 12:46:12,728 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-09-05 12:46:12,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 12:46:12 BoogieIcfgContainer [2019-09-05 12:46:12,759 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 12:46:12,764 INFO L168 Benchmark]: Toolchain (without parser) took 1186.91 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 86.0 MB in the beginning and 144.2 MB in the end (delta: -58.3 MB). Peak memory consumption was 6.2 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:12,766 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 135.3 MB. Free memory was 104.5 MB in the beginning and 104.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 12:46:12,769 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.85 ms. Allocated memory is still 135.3 MB. Free memory was 85.8 MB in the beginning and 76.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:12,772 INFO L168 Benchmark]: Boogie Preprocessor took 123.61 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 76.8 MB in the beginning and 177.7 MB in the end (delta: -100.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:12,773 INFO L168 Benchmark]: RCFGBuilder took 252.60 ms. Allocated memory is still 199.8 MB. Free memory was 177.7 MB in the beginning and 165.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:12,774 INFO L168 Benchmark]: TraceAbstraction took 522.34 ms. Allocated memory is still 199.8 MB. Free memory was 165.3 MB in the beginning and 144.2 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:12,787 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 135.3 MB. Free memory was 104.5 MB in the beginning and 104.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.85 ms. Allocated memory is still 135.3 MB. Free memory was 85.8 MB in the beginning and 76.8 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.61 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 76.8 MB in the beginning and 177.7 MB in the end (delta: -100.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 252.60 ms. Allocated memory is still 199.8 MB. Free memory was 177.7 MB in the beginning and 165.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 522.34 ms. Allocated memory is still 199.8 MB. Free memory was 165.3 MB in the beginning and 144.2 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int x; VAL [\old(x)=1, x=0] [L20] x=__VERIFIER_nondet_int() [L21] COND FALSE !(x > 0) VAL [\old(x)=0, x=-1] [L26] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=-1] [L4] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=-1] [L5] __VERIFIER_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. UNSAFE Result, 0.4s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 26 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...