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/loop-new/gauss_sum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:05:45,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:05:45,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:05:45,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:05:45,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:05:45,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:05:45,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:05:45,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:05:45,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:05:45,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:05:45,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:05:45,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:05:45,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:05:45,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:05:45,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:05:45,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:05:45,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:05:45,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:05:45,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:05:45,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:05:45,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:05:45,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:05:45,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:05:45,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:05:45,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:05:45,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:05:45,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:05:45,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:05:45,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:05:45,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:05:45,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:05:45,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:05:45,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:05:45,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:05:45,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:05:45,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:05:45,852 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 01:05:45,884 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:05:45,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:05:45,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:05:45,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:05:45,892 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:05:45,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:05:45,892 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:05:45,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:05:45,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:05:45,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:05:45,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:05:45,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:05:45,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:05:45,895 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:05:45,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:05:45,896 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:05:45,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:05:45,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:05:45,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:05:45,898 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:05:45,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:05:45,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:05:45,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:05:45,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:05:45,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:05:45,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:05:45,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:05:45,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:05:45,900 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 01:05:46,186 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:05:46,199 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:05:46,203 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:05:46,204 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:05:46,205 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:05:46,206 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i [2019-10-15 01:05:46,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5026e74d6/9318fb68aad041b8a57eb96833994cb0/FLAG026bb5ec5 [2019-10-15 01:05:46,720 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:05:46,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i [2019-10-15 01:05:46,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5026e74d6/9318fb68aad041b8a57eb96833994cb0/FLAG026bb5ec5 [2019-10-15 01:05:47,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5026e74d6/9318fb68aad041b8a57eb96833994cb0 [2019-10-15 01:05:47,134 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:05:47,135 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:05:47,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:05:47,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:05:47,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:05:47,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:05:47" (1/1) ... [2019-10-15 01:05:47,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2471a011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:47, skipping insertion in model container [2019-10-15 01:05:47,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:05:47" (1/1) ... [2019-10-15 01:05:47,152 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:05:47,170 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:05:47,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:05:47,407 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:05:47,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:05:47,442 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:05:47,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:47 WrapperNode [2019-10-15 01:05:47,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:05:47,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:05:47,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:05:47,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:05:47,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:47" (1/1) ... [2019-10-15 01:05:47,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:47" (1/1) ... [2019-10-15 01:05:47,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:47" (1/1) ... [2019-10-15 01:05:47,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:47" (1/1) ... [2019-10-15 01:05:47,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:47" (1/1) ... [2019-10-15 01:05:47,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:47" (1/1) ... [2019-10-15 01:05:47,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:47" (1/1) ... [2019-10-15 01:05:47,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:05:47,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:05:47,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:05:47,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:05:47,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:05:47,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:05:47,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:05:47,621 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:05:47,621 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:05:47,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:05:47,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:05:47,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:05:47,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:05:47,622 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:05:47,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:05:47,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:05:47,808 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:05:47,809 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:05:47,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:05:47 BoogieIcfgContainer [2019-10-15 01:05:47,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:05:47,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:05:47,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:05:47,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:05:47,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:05:47" (1/3) ... [2019-10-15 01:05:47,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a164f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:05:47, skipping insertion in model container [2019-10-15 01:05:47,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:47" (2/3) ... [2019-10-15 01:05:47,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a164f9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:05:47, skipping insertion in model container [2019-10-15 01:05:47,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:05:47" (3/3) ... [2019-10-15 01:05:47,841 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i [2019-10-15 01:05:47,864 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:05:47,877 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:05:47,916 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:05:47,964 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:05:47,964 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:05:47,965 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:05:47,965 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:05:47,965 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:05:47,965 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:05:47,965 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:05:47,965 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:05:47,984 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:05:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:05:47,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:47,990 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:47,992 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1281911547, now seen corresponding path program 1 times [2019-10-15 01:05:48,009 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:48,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81546392] [2019-10-15 01:05:48,010 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:48,010 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:48,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:48,114 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 01:05:48,116 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81546392] [2019-10-15 01:05:48,118 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:05:48,119 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:05:48,119 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181248560] [2019-10-15 01:05:48,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:05:48,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:48,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:05:48,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:05:48,140 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-10-15 01:05:48,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:48,163 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-10-15 01:05:48,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:05:48,164 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-10-15 01:05:48,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:48,173 INFO L225 Difference]: With dead ends: 32 [2019-10-15 01:05:48,173 INFO L226 Difference]: Without dead ends: 13 [2019-10-15 01:05:48,177 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 01:05:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-15 01:05:48,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-15 01:05:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-15 01:05:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-15 01:05:48,217 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-15 01:05:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:48,218 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-15 01:05:48,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:05:48,218 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-15 01:05:48,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:05:48,220 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:48,220 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:48,220 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:48,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:48,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1287452673, now seen corresponding path program 1 times [2019-10-15 01:05:48,221 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:48,222 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128885978] [2019-10-15 01:05:48,222 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:48,222 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:48,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:48,231 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:05:48,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376405926] [2019-10-15 01:05:48,232 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 01:05:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:48,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:05:48,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:05:48,322 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 01:05:48,323 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:05:48,345 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 01:05:48,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128885978] [2019-10-15 01:05:48,347 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:05:48,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376405926] [2019-10-15 01:05:48,347 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:05:48,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-15 01:05:48,348 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761252460] [2019-10-15 01:05:48,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:05:48,350 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:48,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:05:48,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:05:48,351 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2019-10-15 01:05:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:48,384 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-10-15 01:05:48,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:05:48,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:05:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:48,387 INFO L225 Difference]: With dead ends: 20 [2019-10-15 01:05:48,387 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 01:05:48,388 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:05:48,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 01:05:48,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-10-15 01:05:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-15 01:05:48,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-15 01:05:48,394 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-10-15 01:05:48,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:48,396 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-15 01:05:48,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:05:48,397 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-15 01:05:48,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:05:48,399 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:48,399 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:48,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:48,611 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:48,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:48,612 INFO L82 PathProgramCache]: Analyzing trace with hash 843923389, now seen corresponding path program 1 times [2019-10-15 01:05:48,613 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:48,614 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149332419] [2019-10-15 01:05:48,614 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:48,614 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:48,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:48,629 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:05:48,630 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170672971] [2019-10-15 01:05:48,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:48,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-15 01:05:48,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:05:48,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:05:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:05:48,800 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:05:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:05:49,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149332419] [2019-10-15 01:05:49,063 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:05:49,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170672971] [2019-10-15 01:05:49,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [711161780] [2019-10-15 01:05:49,074 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 14 [2019-10-15 01:05:49,123 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:05:49,124 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:05:49,248 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:05:49,251 INFO L272 AbstractInterpreter]: Visited 13 different actions 44 times. Merged at 3 different actions 14 times. Widened at 1 different actions 3 times. Performed 72 root evaluator evaluations with a maximum evaluation depth of 6. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2019-10-15 01:05:49,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:49,255 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:05:49,256 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:05:49,256 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-10-15 01:05:49,256 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478176943] [2019-10-15 01:05:49,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-15 01:05:49,257 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:49,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-15 01:05:49,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-15 01:05:49,258 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2019-10-15 01:05:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:49,502 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-10-15 01:05:49,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 01:05:49,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2019-10-15 01:05:49,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:49,504 INFO L225 Difference]: With dead ends: 21 [2019-10-15 01:05:49,504 INFO L226 Difference]: Without dead ends: 16 [2019-10-15 01:05:49,505 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:05:49,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-15 01:05:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-15 01:05:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-15 01:05:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-10-15 01:05:49,511 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2019-10-15 01:05:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:49,511 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-10-15 01:05:49,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-15 01:05:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-10-15 01:05:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:05:49,512 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:49,513 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:49,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:49,717 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:49,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:49,718 INFO L82 PathProgramCache]: Analyzing trace with hash 396918779, now seen corresponding path program 2 times [2019-10-15 01:05:49,718 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:49,719 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688837038] [2019-10-15 01:05:49,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:49,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:49,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:49,753 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:05:49,753 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443483825] [2019-10-15 01:05:49,756 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:49,786 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:05:49,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:05:49,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-15 01:05:49,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:05:49,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:05:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:05:49,908 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:05:51,743 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (= (* main_~n~0 (+ main_~n~0 1)) (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0) 2)) (< main_~n~0 .cse0)))) is different from true [2019-10-15 01:05:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2019-10-15 01:05:52,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688837038] [2019-10-15 01:05:52,195 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:05:52,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443483825] [2019-10-15 01:05:52,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1510113774] [2019-10-15 01:05:52,196 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:05:52,196 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:05:52,196 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:05:52,196 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-10-15 01:05:52,197 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089470469] [2019-10-15 01:05:52,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:05:52,198 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:52,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:05:52,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=198, Unknown=1, NotChecked=28, Total=272 [2019-10-15 01:05:52,199 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 17 states. [2019-10-15 01:05:52,526 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (= (* main_~n~0 (+ main_~n~0 1)) (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0) 2)) (< main_~n~0 .cse0)))) (or (< c_main_~i~0 c_main_~n~0) (= (* c_main_~n~0 (+ c_main_~n~0 1)) (* 2 c_main_~sum~0)))) is different from true [2019-10-15 01:05:52,634 WARN L860 $PredicateComparison]: unable to prove that (and (or (<= c_main_~i~0 c_main_~n~0) (= (* c_main_~n~0 (+ c_main_~n~0 1)) (* 2 c_main_~sum~0))) (forall ((main_~n~0 Int)) (or (< c_main_~i~0 main_~n~0) (= (* main_~n~0 (+ main_~n~0 1)) (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0))) (< main_~n~0 c_main_~i~0)))) is different from true [2019-10-15 01:05:52,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:52,701 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-10-15 01:05:52,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-15 01:05:52,701 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2019-10-15 01:05:52,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:52,702 INFO L225 Difference]: With dead ends: 19 [2019-10-15 01:05:52,702 INFO L226 Difference]: Without dead ends: 0 [2019-10-15 01:05:52,703 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=84, Invalid=386, Unknown=4, NotChecked=126, Total=600 [2019-10-15 01:05:52,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-15 01:05:52,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-15 01:05:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-15 01:05:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-15 01:05:52,704 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2019-10-15 01:05:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:52,704 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-15 01:05:52,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:05:52,704 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-15 01:05:52,704 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-15 01:05:52,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:52,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-15 01:05:53,215 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 19 [2019-10-15 01:05:53,219 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-15 01:05:53,219 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:05:53,219 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:05:53,219 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-15 01:05:53,219 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-15 01:05:53,219 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-15 01:05:53,219 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2019-10-15 01:05:53,219 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2019-10-15 01:05:53,220 INFO L443 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2019-10-15 01:05:53,220 INFO L443 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2019-10-15 01:05:53,220 INFO L443 ceAbstractionStarter]: For program point L15-2(lines 15 17) no Hoare annotation was computed. [2019-10-15 01:05:53,220 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2019-10-15 01:05:53,220 INFO L439 ceAbstractionStarter]: At program point L15-3(lines 15 17) the Hoare annotation is: (and (or (<= main_~i~0 main_~n~0) (= (* main_~n~0 (+ main_~n~0 1)) (* 2 main_~sum~0))) (forall ((main_~n~0 Int)) (or (< main_~i~0 main_~n~0) (= (* main_~n~0 (+ main_~n~0 1)) (+ (* 2 main_~i~0) (* 2 main_~sum~0))) (< main_~n~0 main_~i~0)))) [2019-10-15 01:05:53,220 INFO L439 ceAbstractionStarter]: At program point L15-4(lines 15 17) the Hoare annotation is: (= (* main_~n~0 (+ main_~n~0 1)) (* 2 main_~sum~0)) [2019-10-15 01:05:53,221 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-15 01:05:53,221 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-15 01:05:53,221 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-15 01:05:53,221 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-15 01:05:53,221 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-15 01:05:53,221 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-15 01:05:53,228 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2019-10-15 01:05:53,229 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2019-10-15 01:05:53,230 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2019-10-15 01:05:53,230 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2019-10-15 01:05:53,237 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2019-10-15 01:05:53,237 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2019-10-15 01:05:53,237 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2019-10-15 01:05:53,238 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2019-10-15 01:05:53,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:05:53 BoogieIcfgContainer [2019-10-15 01:05:53,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 01:05:53,243 INFO L168 Benchmark]: Toolchain (without parser) took 6107.41 ms. Allocated memory was 137.4 MB in the beginning and 231.7 MB in the end (delta: 94.4 MB). Free memory was 101.6 MB in the beginning and 122.5 MB in the end (delta: -20.9 MB). Peak memory consumption was 73.5 MB. Max. memory is 7.1 GB. [2019-10-15 01:05:53,244 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-15 01:05:53,245 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.15 ms. Allocated memory is still 137.4 MB. Free memory was 101.4 MB in the beginning and 91.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-10-15 01:05:53,246 INFO L168 Benchmark]: Boogie Preprocessor took 118.88 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 179.1 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2019-10-15 01:05:53,247 INFO L168 Benchmark]: RCFGBuilder took 247.51 ms. Allocated memory is still 200.3 MB. Free memory was 179.1 MB in the beginning and 167.2 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2019-10-15 01:05:53,248 INFO L168 Benchmark]: TraceAbstraction took 5420.56 ms. Allocated memory was 200.3 MB in the beginning and 231.7 MB in the end (delta: 31.5 MB). Free memory was 167.2 MB in the beginning and 122.5 MB in the end (delta: 44.7 MB). Peak memory consumption was 76.1 MB. Max. memory is 7.1 GB. [2019-10-15 01:05:53,253 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 137.4 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 307.15 ms. Allocated memory is still 137.4 MB. Free memory was 101.4 MB in the beginning and 91.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.88 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 179.1 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 247.51 ms. Allocated memory is still 200.3 MB. Free memory was 179.1 MB in the beginning and 167.2 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5420.56 ms. Allocated memory was 200.3 MB in the beginning and 231.7 MB in the end (delta: 31.5 MB). Free memory was 167.2 MB in the beginning and 122.5 MB in the end (delta: 44.7 MB). Peak memory consumption was 76.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 15]: Loop Invariant [2019-10-15 01:05:53,264 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2019-10-15 01:05:53,264 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2019-10-15 01:05:53,264 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2019-10-15 01:05:53,264 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2019-10-15 01:05:53,265 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2019-10-15 01:05:53,265 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2019-10-15 01:05:53,265 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2019-10-15 01:05:53,265 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] Derived loop invariant: (i <= n || n * (n + 1) == 2 * sum) && (forall main_~n~0 : int :: (i < main_~n~0 || main_~n~0 * (main_~n~0 + 1) == 2 * i + 2 * sum) || main_~n~0 < i) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Result: SAFE, OverallTime: 5.2s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, HoareTripleCheckerStatistics: 48 SDtfs, 8 SDslu, 132 SDs, 0 SdLazy, 143 SolverSat, 12 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 3.1s 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, 4 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 17 NumberOfFragments, 49 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 130 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 82 ConstructedInterpolants, 3 QuantifiedInterpolants, 4368 SizeOfPredicates, 11 NumberOfNonLiveVariables, 105 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 1/10 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...