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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loops/trex02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:06:21,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:06:21,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:06:21,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:06:21,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:06:21,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:06:21,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:06:21,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:06:21,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:06:21,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:06:21,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:06:21,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:06:21,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:06:21,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:06:21,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:06:21,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:06:21,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:06:21,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:06:21,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:06:21,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:06:21,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:06:21,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:06:21,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:06:21,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:06:21,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:06:21,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:06:21,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:06:21,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:06:21,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:06:21,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:06:21,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:06:21,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:06:21,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:06:21,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:06:21,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:06:21,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:06:21,783 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:06:21,803 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:06:21,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:06:21,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:06:21,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:06:21,806 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:06:21,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:06:21,806 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:06:21,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:06:21,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:06:21,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:06:21,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:06:21,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:06:21,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:06:21,809 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:06:21,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:06:21,809 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:06:21,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:06:21,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:06:21,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:06:21,810 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:06:21,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:06:21,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:06:21,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:06:21,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:06:21,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:06:21,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:06:21,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:06:21,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:06:21,812 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:06:22,103 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:06:22,116 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:06:22,120 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:06:22,122 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:06:22,122 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:06:22,123 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-2.c [2019-10-15 01:06:22,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6da294a9e/d3366761d8cf4a5fa1c1f6bee03d6a09/FLAG34d327870 [2019-10-15 01:06:22,634 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:06:22,634 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-2.c [2019-10-15 01:06:22,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6da294a9e/d3366761d8cf4a5fa1c1f6bee03d6a09/FLAG34d327870 [2019-10-15 01:06:23,030 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6da294a9e/d3366761d8cf4a5fa1c1f6bee03d6a09 [2019-10-15 01:06:23,040 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:06:23,042 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:06:23,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:23,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:06:23,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:06:23,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:23" (1/1) ... [2019-10-15 01:06:23,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@343aa16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:23, skipping insertion in model container [2019-10-15 01:06:23,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:23" (1/1) ... [2019-10-15 01:06:23,058 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:06:23,075 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:06:23,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:23,247 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:06:23,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:23,278 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:06:23,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:23 WrapperNode [2019-10-15 01:06:23,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:23,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:06:23,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:06:23,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:06:23,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:23" (1/1) ... [2019-10-15 01:06:23,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:23" (1/1) ... [2019-10-15 01:06:23,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:23" (1/1) ... [2019-10-15 01:06:23,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:23" (1/1) ... [2019-10-15 01:06:23,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:23" (1/1) ... [2019-10-15 01:06:23,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:23" (1/1) ... [2019-10-15 01:06:23,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:23" (1/1) ... [2019-10-15 01:06:23,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:06:23,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:06:23,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:06:23,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:06:23,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:23" (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 [2019-10-15 01:06:23,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:06:23,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:06:23,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:06:23,466 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-10-15 01:06:23,466 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:06:23,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:06:23,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:06:23,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-15 01:06:23,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:06:23,467 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-10-15 01:06:23,468 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:06:23,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:06:23,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:06:23,666 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:06:23,666 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:06:23,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:23 BoogieIcfgContainer [2019-10-15 01:06:23,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:06:23,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:06:23,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:06:23,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:06:23,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:06:23" (1/3) ... [2019-10-15 01:06:23,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602cd9e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:23, skipping insertion in model container [2019-10-15 01:06:23,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:23" (2/3) ... [2019-10-15 01:06:23,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602cd9e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:23, skipping insertion in model container [2019-10-15 01:06:23,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:23" (3/3) ... [2019-10-15 01:06:23,692 INFO L109 eAbstractionObserver]: Analyzing ICFG trex02-2.c [2019-10-15 01:06:23,709 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:06:23,737 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:06:23,760 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:06:23,786 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:06:23,786 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:06:23,787 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:06:23,787 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:06:23,787 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:06:23,787 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:06:23,787 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:06:23,787 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:06:23,811 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-15 01:06:23,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:06:23,817 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:23,819 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:23,821 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:23,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:23,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1873481772, now seen corresponding path program 1 times [2019-10-15 01:06:23,843 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:23,844 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212045910] [2019-10-15 01:06:23,844 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:23,845 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:23,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:23,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212045910] [2019-10-15 01:06:23,947 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:23,948 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:06:23,948 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443670706] [2019-10-15 01:06:23,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:06:23,953 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:23,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:06:23,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:06:23,969 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2019-10-15 01:06:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:23,991 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-10-15 01:06:23,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:06:23,993 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-10-15 01:06:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:24,003 INFO L225 Difference]: With dead ends: 35 [2019-10-15 01:06:24,003 INFO L226 Difference]: Without dead ends: 18 [2019-10-15 01:06:24,006 INFO L600 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 [2019-10-15 01:06:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-15 01:06:24,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-15 01:06:24,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:06:24,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:06:24,044 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2019-10-15 01:06:24,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:24,044 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:06:24,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:06:24,045 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:06:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:06:24,046 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:24,046 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:24,047 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:24,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:24,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1862399520, now seen corresponding path program 1 times [2019-10-15 01:06:24,048 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:24,048 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453950380] [2019-10-15 01:06:24,048 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:24,048 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:24,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 01:06:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 01:06:24,093 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-15 01:06:24,093 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-15 01:06:24,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:06:24 BoogieIcfgContainer [2019-10-15 01:06:24,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 01:06:24,116 INFO L168 Benchmark]: Toolchain (without parser) took 1073.36 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 103.9 MB in the beginning and 146.3 MB in the end (delta: -42.4 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:24,117 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-15 01:06:24,118 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.77 ms. Allocated memory is still 138.4 MB. Free memory was 103.5 MB in the beginning and 94.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:24,119 INFO L168 Benchmark]: Boogie Preprocessor took 125.72 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 94.3 MB in the beginning and 180.6 MB in the end (delta: -86.3 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:24,120 INFO L168 Benchmark]: RCFGBuilder took 262.57 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 168.6 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:24,121 INFO L168 Benchmark]: TraceAbstraction took 436.91 ms. Allocated memory is still 201.9 MB. Free memory was 168.6 MB in the beginning and 146.3 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:24,126 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 236.77 ms. Allocated memory is still 138.4 MB. Free memory was 103.5 MB in the beginning and 94.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.72 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 94.3 MB in the beginning and 180.6 MB in the end (delta: -86.3 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 262.57 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 168.6 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 436.91 ms. Allocated memory is still 201.9 MB. Free memory was 168.6 MB in the beginning and 146.3 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.3 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. Result: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, 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 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, 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, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...