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/nla-digbench/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:06:38,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:06:38,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:06:38,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:06:38,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:06:38,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:06:38,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:06:38,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:06:38,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:06:38,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:06:38,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:06:38,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:06:38,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:06:38,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:06:38,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:06:38,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:06:38,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:06:38,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:06:38,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:06:38,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:06:38,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:06:38,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:06:38,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:06:38,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:06:38,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:06:38,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:06:38,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:06:38,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:06:38,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:06:38,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:06:38,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:06:38,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:06:38,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:06:38,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:06:38,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:06:38,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:06:38,801 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 01:06:38,833 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:06:38,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:06:38,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:06:38,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:06:38,835 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:06:38,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:06:38,836 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:06:38,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:06:38,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:06:38,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:06:38,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:06:38,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:06:38,838 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:06:38,838 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:06:38,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:06:38,839 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:06:38,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:06:38,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:06:38,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:06:38,840 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:06:38,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:06:38,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:06:38,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:06:38,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:06:38,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:06:38,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:06:38,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:06:38,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:06:38,844 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 01:06:39,102 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:06:39,127 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:06:39,130 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:06:39,132 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:06:39,132 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:06:39,133 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2019-10-15 01:06:39,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7e169ad7/7946bb60ae7443e9aafd60fd003ba4ce/FLAG7ac0d654d [2019-10-15 01:06:39,637 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:06:39,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps2.c [2019-10-15 01:06:39,644 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7e169ad7/7946bb60ae7443e9aafd60fd003ba4ce/FLAG7ac0d654d [2019-10-15 01:06:40,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7e169ad7/7946bb60ae7443e9aafd60fd003ba4ce [2019-10-15 01:06:40,041 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:06:40,043 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:06:40,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:40,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:06:40,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:06:40,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:40" (1/1) ... [2019-10-15 01:06:40,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6836b2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:40, skipping insertion in model container [2019-10-15 01:06:40,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:40" (1/1) ... [2019-10-15 01:06:40,059 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:06:40,079 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:06:40,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:40,237 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:06:40,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:40,265 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:06:40,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:40 WrapperNode [2019-10-15 01:06:40,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:40,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:06:40,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:06:40,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:06:40,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:40" (1/1) ... [2019-10-15 01:06:40,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:40" (1/1) ... [2019-10-15 01:06:40,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:40" (1/1) ... [2019-10-15 01:06:40,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:40" (1/1) ... [2019-10-15 01:06:40,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:40" (1/1) ... [2019-10-15 01:06:40,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:40" (1/1) ... [2019-10-15 01:06:40,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:40" (1/1) ... [2019-10-15 01:06:40,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:06:40,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:06:40,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:06:40,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:06:40,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:40" (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 01:06:40,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:06:40,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:06:40,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:06:40,442 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:06:40,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:06:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:06:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:06:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:06:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:06:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:06:40,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:06:40,610 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:06:40,611 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:06:40,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:40 BoogieIcfgContainer [2019-10-15 01:06:40,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:06:40,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:06:40,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:06:40,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:06:40,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:06:40" (1/3) ... [2019-10-15 01:06:40,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339db80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:40, skipping insertion in model container [2019-10-15 01:06:40,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:40" (2/3) ... [2019-10-15 01:06:40,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339db80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:40, skipping insertion in model container [2019-10-15 01:06:40,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:40" (3/3) ... [2019-10-15 01:06:40,620 INFO L109 eAbstractionObserver]: Analyzing ICFG ps2.c [2019-10-15 01:06:40,629 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:06:40,639 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:06:40,649 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:06:40,671 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:06:40,671 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:06:40,671 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:06:40,671 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:06:40,671 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:06:40,671 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:06:40,671 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:06:40,671 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:06:40,685 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:06:40,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:06:40,690 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:40,690 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:40,692 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:40,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:40,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1712389503, now seen corresponding path program 1 times [2019-10-15 01:06:40,704 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:40,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820974656] [2019-10-15 01:06:40,704 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:40,705 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:40,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:40,796 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 01:06:40,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820974656] [2019-10-15 01:06:40,797 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:40,797 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:06:40,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76860731] [2019-10-15 01:06:40,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:06:40,802 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:40,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:06:40,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:06:40,815 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-10-15 01:06:40,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:40,842 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2019-10-15 01:06:40,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:06:40,844 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-15 01:06:40,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:40,853 INFO L225 Difference]: With dead ends: 35 [2019-10-15 01:06:40,853 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 01:06:40,856 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 01:06:40,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 01:06:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 01:06:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 01:06:40,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-10-15 01:06:40,891 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-10-15 01:06:40,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:40,892 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-10-15 01:06:40,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:06:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-10-15 01:06:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:06:40,893 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:40,893 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:40,893 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:40,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1704941753, now seen corresponding path program 1 times [2019-10-15 01:06:40,894 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:40,894 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234378073] [2019-10-15 01:06:40,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:40,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:40,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:40,902 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:40,902 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010912073] [2019-10-15 01:06:40,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:40,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 01:06:40,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:41,153 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 01:06:41,155 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:41,276 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 01:06:41,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234378073] [2019-10-15 01:06:41,277 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:41,278 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010912073] [2019-10-15 01:06:41,278 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:41,278 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-15 01:06:41,278 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10098156] [2019-10-15 01:06:41,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:06:41,280 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:41,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:06:41,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:06:41,281 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2019-10-15 01:06:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:41,387 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2019-10-15 01:06:41,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:06:41,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-10-15 01:06:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:41,388 INFO L225 Difference]: With dead ends: 19 [2019-10-15 01:06:41,388 INFO L226 Difference]: Without dead ends: 0 [2019-10-15 01:06:41,391 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:06:41,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-15 01:06:41,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-15 01:06:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-15 01:06:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-15 01:06:41,393 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2019-10-15 01:06:41,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:41,393 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-15 01:06:41,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:06:41,393 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-15 01:06:41,394 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-15 01:06:41,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:41,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-15 01:06:41,722 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-15 01:06:41,722 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:06:41,722 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:06:41,723 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-15 01:06:41,723 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-15 01:06:41,723 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-15 01:06:41,725 INFO L443 ceAbstractionStarter]: For program point L30(line 30) no Hoare annotation was computed. [2019-10-15 01:06:41,725 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 12 33) the Hoare annotation is: true [2019-10-15 01:06:41,725 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 12 33) no Hoare annotation was computed. [2019-10-15 01:06:41,725 INFO L439 ceAbstractionStarter]: At program point L21(line 21) the Hoare annotation is: (= (* 2 main_~x~0) (+ main_~y~0 (* main_~y~0 main_~y~0))) [2019-10-15 01:06:41,726 INFO L443 ceAbstractionStarter]: For program point L21-1(lines 20 29) no Hoare annotation was computed. [2019-10-15 01:06:41,726 INFO L439 ceAbstractionStarter]: At program point L20-2(lines 20 29) the Hoare annotation is: (= (* 2 main_~x~0) (+ main_~y~0 (* main_~y~0 main_~y~0))) [2019-10-15 01:06:41,726 INFO L439 ceAbstractionStarter]: At program point L20-3(lines 20 29) the Hoare annotation is: (= (* 2 main_~x~0) (+ main_~y~0 (* main_~y~0 main_~y~0))) [2019-10-15 01:06:41,726 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 12 33) no Hoare annotation was computed. [2019-10-15 01:06:41,727 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2019-10-15 01:06:41,727 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 4 10) the Hoare annotation is: true [2019-10-15 01:06:41,727 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 4 10) no Hoare annotation was computed. [2019-10-15 01:06:41,727 INFO L443 ceAbstractionStarter]: For program point L6(lines 6 7) no Hoare annotation was computed. [2019-10-15 01:06:41,727 INFO L443 ceAbstractionStarter]: For program point L5(lines 5 8) no Hoare annotation was computed. [2019-10-15 01:06:41,727 INFO L443 ceAbstractionStarter]: For program point L5-2(lines 4 10) no Hoare annotation was computed. [2019-10-15 01:06:41,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:06:41 BoogieIcfgContainer [2019-10-15 01:06:41,741 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 01:06:41,744 INFO L168 Benchmark]: Toolchain (without parser) took 1699.96 ms. Allocated memory was 147.3 MB in the beginning and 205.5 MB in the end (delta: 58.2 MB). Free memory was 103.9 MB in the beginning and 129.2 MB in the end (delta: -25.3 MB). Peak memory consumption was 32.9 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:41,745 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 147.3 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-10-15 01:06:41,746 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.95 ms. Allocated memory is still 147.3 MB. Free memory was 103.5 MB in the beginning and 94.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:41,747 INFO L168 Benchmark]: Boogie Preprocessor took 122.80 ms. Allocated memory was 147.3 MB in the beginning and 205.5 MB in the end (delta: 58.2 MB). Free memory was 94.2 MB in the beginning and 184.2 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:41,748 INFO L168 Benchmark]: RCFGBuilder took 223.21 ms. Allocated memory is still 205.5 MB. Free memory was 184.2 MB in the beginning and 173.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:41,749 INFO L168 Benchmark]: TraceAbstraction took 1127.71 ms. Allocated memory is still 205.5 MB. Free memory was 173.1 MB in the beginning and 129.2 MB in the end (delta: 43.9 MB). Peak memory consumption was 43.9 MB. Max. memory is 7.1 GB. [2019-10-15 01:06:41,753 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 147.3 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 221.95 ms. Allocated memory is still 147.3 MB. Free memory was 103.5 MB in the beginning and 94.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.80 ms. Allocated memory was 147.3 MB in the beginning and 205.5 MB in the end (delta: 58.2 MB). Free memory was 94.2 MB in the beginning and 184.2 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 223.21 ms. Allocated memory is still 205.5 MB. Free memory was 184.2 MB in the beginning and 173.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1127.71 ms. Allocated memory is still 205.5 MB. Free memory was 173.1 MB in the beginning and 129.2 MB in the end (delta: 43.9 MB). Peak memory consumption was 43.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 2 * x == y + y * y - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Result: SAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 31 SDtfs, 9 SDslu, 39 SDs, 0 SdLazy, 20 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 13 PreInvPairs, 19 NumberOfFragments, 32 HoareAnnotationTreeSize, 13 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 585 SizeOfPredicates, 2 NumberOfNonLiveVariables, 30 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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 correct! Received shutdown request...