java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 13:07:06,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 13:07:06,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 13:07:06,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 13:07:06,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 13:07:06,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 13:07:06,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 13:07:06,156 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 13:07:06,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 13:07:06,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 13:07:06,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 13:07:06,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-09-05 13:07:06,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-05 13:07:06,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-05 13:07:06,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-05 13:07:06,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-05 13:07:06,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-05 13:07:06,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-05 13:07:06,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-05 13:07:06,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-05 13:07:06,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 13:07:06,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 13:07:06,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 13:07:06,189 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-05 13:07:06,215 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 13:07:06,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 13:07:06,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-05 13:07:06,217 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-05 13:07:06,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-05 13:07:06,218 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-05 13:07:06,218 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-05 13:07:06,218 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-05 13:07:06,218 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-05 13:07:06,219 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-05 13:07:06,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 13:07:06,220 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 13:07:06,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 13:07:06,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 13:07:06,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 13:07:06,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 13:07:06,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 13:07:06,221 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 13:07:06,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 13:07:06,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 13:07:06,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 13:07:06,222 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-05 13:07:06,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 13:07:06,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 13:07:06,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 13:07:06,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 13:07:06,223 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-05 13:07:06,223 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 13:07:06,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 13:07:06,223 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-05 13:07:06,262 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 13:07:06,280 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 13:07:06,285 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 13:07:06,287 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 13:07:06,288 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 13:07:06,289 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-09-05 13:07:06,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0787eb734/489e57dcfb3e447bbe8ed787d42bd65f/FLAG2b811c4ed [2019-09-05 13:07:06,763 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 13:07:06,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-09-05 13:07:06,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0787eb734/489e57dcfb3e447bbe8ed787d42bd65f/FLAG2b811c4ed [2019-09-05 13:07:07,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0787eb734/489e57dcfb3e447bbe8ed787d42bd65f [2019-09-05 13:07:07,149 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 13:07:07,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 13:07:07,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 13:07:07,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 13:07:07,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 13:07:07,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:07:07" (1/1) ... [2019-09-05 13:07:07,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7615346f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:07, skipping insertion in model container [2019-09-05 13:07:07,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:07:07" (1/1) ... [2019-09-05 13:07:07,166 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 13:07:07,184 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 13:07:07,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:07:07,364 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 13:07:07,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:07:07,398 INFO L192 MainTranslator]: Completed translation [2019-09-05 13:07:07,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:07 WrapperNode [2019-09-05 13:07:07,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 13:07:07,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 13:07:07,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 13:07:07,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 13:07:07,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:07" (1/1) ... [2019-09-05 13:07:07,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:07" (1/1) ... [2019-09-05 13:07:07,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:07" (1/1) ... [2019-09-05 13:07:07,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:07" (1/1) ... [2019-09-05 13:07:07,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:07" (1/1) ... [2019-09-05 13:07:07,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:07" (1/1) ... [2019-09-05 13:07:07,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:07" (1/1) ... [2019-09-05 13:07:07,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 13:07:07,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 13:07:07,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 13:07:07,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 13:07:07,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 13:07:07,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 13:07:07,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 13:07:07,561 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 13:07:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 13:07:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 13:07:07,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 13:07:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 13:07:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 13:07:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 13:07:07,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 13:07:07,713 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 13:07:07,714 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-05 13:07:07,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:07:07 BoogieIcfgContainer [2019-09-05 13:07:07,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 13:07:07,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 13:07:07,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 13:07:07,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 13:07:07,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 01:07:07" (1/3) ... [2019-09-05 13:07:07,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72219685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:07:07, skipping insertion in model container [2019-09-05 13:07:07,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:07:07" (2/3) ... [2019-09-05 13:07:07,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72219685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:07:07, skipping insertion in model container [2019-09-05 13:07:07,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:07:07" (3/3) ... [2019-09-05 13:07:07,722 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.v+cfa-reducer.c [2019-09-05 13:07:07,730 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 13:07:07,737 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 13:07:07,752 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 13:07:07,779 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 13:07:07,779 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-05 13:07:07,780 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 13:07:07,780 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 13:07:07,780 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 13:07:07,780 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 13:07:07,780 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 13:07:07,781 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 13:07:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-09-05 13:07:07,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-05 13:07:07,805 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:07:07,806 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:07:07,808 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:07:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:07:07,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-09-05 13:07:07,816 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:07:07,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:07,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:07:07,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:07,857 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:07:07,892 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:07:07,892 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:07:07,892 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 [2019-09-05 13:07:07,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:07:07,914 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:07:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:07:07,940 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-05 13:07:07,942 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 13:07:07,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:07:07,942 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 13:07:07,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:07:07,958 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:07:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:07:07,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-05 13:07:07,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:07:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:07:08,070 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:07:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:07:08,131 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:07:08,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2019-09-05 13:07:08,132 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:07:08,138 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-05 13:07:08,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-05 13:07:08,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-05 13:07:08,155 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-09-05 13:07:08,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:07:08,200 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2019-09-05 13:07:08,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-05 13:07:08,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-09-05 13:07:08,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:07:08,212 INFO L225 Difference]: With dead ends: 19 [2019-09-05 13:07:08,212 INFO L226 Difference]: Without dead ends: 13 [2019-09-05 13:07:08,214 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-05 13:07:08,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-05 13:07:08,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-05 13:07:08,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-05 13:07:08,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-05 13:07:08,259 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-05 13:07:08,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:07:08,260 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-05 13:07:08,260 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-05 13:07:08,260 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-05 13:07:08,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-05 13:07:08,261 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:07:08,262 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:07:08,262 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:07:08,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:07:08,263 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-09-05 13:07:08,263 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:07:08,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:08,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:07:08,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:08,266 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:07:08,279 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:07:08,279 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:07:08,280 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 [2019-09-05 13:07:08,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:07:08,293 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:07:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:07:08,311 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 13 with the following transitions: [2019-09-05 13:07:08,313 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [13], [17], [19], [22], [23], [27], [28], [29] [2019-09-05 13:07:08,341 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:07:08,341 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:07:08,483 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:07:08,486 INFO L272 AbstractInterpreter]: Visited 12 different actions 34 times. Merged at 4 different actions 21 times. Widened at 1 different actions 3 times. Performed 92 root evaluator evaluations with a maximum evaluation depth of 6. Performed 92 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 10 variables. [2019-09-05 13:07:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:07:08,488 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:07:08,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:07:08,489 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:07:08,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:07:08,503 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:07:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:07:08,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-05 13:07:08,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:07:08,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:07:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:07:08,604 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:07:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:07:08,750 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 13:07:08,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-09-05 13:07:08,751 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:07:08,752 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 13:07:08,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 13:07:08,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-09-05 13:07:08,753 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2019-09-05 13:07:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:07:08,829 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-09-05 13:07:08,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 13:07:08,829 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2019-09-05 13:07:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:07:08,830 INFO L225 Difference]: With dead ends: 15 [2019-09-05 13:07:08,830 INFO L226 Difference]: Without dead ends: 14 [2019-09-05 13:07:08,832 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-05 13:07:08,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-05 13:07:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-05 13:07:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-05 13:07:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-05 13:07:08,835 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-05 13:07:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:07:08,836 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-05 13:07:08,836 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 13:07:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-05 13:07:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-05 13:07:08,837 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:07:08,837 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:07:08,837 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:07:08,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:07:08,838 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-09-05 13:07:08,838 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:07:08,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:08,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:07:08,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:08,840 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:07:08,862 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:07:08,863 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:07:08,863 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 13:07:08,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 13:07:08,889 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 13:07:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:07:08,904 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-05 13:07:08,904 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 13:07:08,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:07:08,904 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 13:07:08,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 13:07:08,934 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:07:08,964 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-05 13:07:08,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 13:07:08,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-05 13:07:08,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:07:09,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:07:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:07:09,019 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:07:09,159 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~main__n~0 Int)) (let ((.cse0 (+ c_main_~main__i~0 1))) (or (= (+ (* 2 c_main_~main__sum~0) (* 4 c_main_~main__i~0) 2) (* (+ main_~main__n~0 1) main_~main__n~0)) (< main_~main__n~0 .cse0) (< .cse0 main_~main__n~0)))) is different from true [2019-09-05 13:07:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-09-05 13:07:09,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 13:07:09,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-09-05 13:07:09,176 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:07:09,177 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 13:07:09,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 13:07:09,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=54, Unknown=1, NotChecked=14, Total=90 [2019-09-05 13:07:09,181 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2019-09-05 13:07:09,339 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((main_~main__n~0 Int)) (or (< c_main_~main__i~0 main_~main__n~0) (= (+ (* 2 c_main_~main__sum~0) (* 2 c_main_~main__i~0)) (* (+ main_~main__n~0 1) main_~main__n~0)) (< main_~main__n~0 c_main_~main__i~0))) (or (<= c_main_~main__i~0 c_main_~main__n~0) (= (* 2 c_main_~main__sum~0) (* (+ c_main_~main__n~0 1) c_main_~main__n~0)))) is different from true [2019-09-05 13:07:09,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:07:09,495 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-09-05 13:07:09,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 13:07:09,495 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-09-05 13:07:09,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:07:09,496 INFO L225 Difference]: With dead ends: 20 [2019-09-05 13:07:09,496 INFO L226 Difference]: Without dead ends: 17 [2019-09-05 13:07:09,497 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=115, Unknown=2, NotChecked=46, Total=210 [2019-09-05 13:07:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-05 13:07:09,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-05 13:07:09,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-05 13:07:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-05 13:07:09,500 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2019-09-05 13:07:09,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:07:09,501 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-05 13:07:09,501 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 13:07:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-05 13:07:09,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-05 13:07:09,502 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:07:09,502 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:07:09,502 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:07:09,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:07:09,503 INFO L82 PathProgramCache]: Analyzing trace with hash -2145617008, now seen corresponding path program 3 times [2019-09-05 13:07:09,503 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:07:09,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:09,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 13:07:09,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:07:09,504 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:07:09,516 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:07:09,516 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:07:09,516 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 13:07:09,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 13:07:09,532 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 13:07:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:07:09,545 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-05 13:07:09,545 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 13:07:09,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:07:09,546 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:07:09,575 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 13:07:09,576 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-09-05 13:07:09,622 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 13:07:09,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 13:07:09,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-05 13:07:09,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:07:09,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:07:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:07:09,716 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:07:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 3 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-05 13:07:16,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 13:07:16,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-09-05 13:07:16,073 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:07:16,074 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 13:07:16,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 13:07:16,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=117, Unknown=3, NotChecked=0, Total=156 [2019-09-05 13:07:16,074 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 13 states. [2019-09-05 13:07:16,328 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((main_~main__n~0 Int)) (let ((.cse0 (+ c_main_~main__i~0 1))) (or (= (+ (* 2 c_main_~main__sum~0) (* 4 c_main_~main__i~0) 2) (* (+ main_~main__n~0 1) main_~main__n~0)) (< main_~main__n~0 .cse0) (< .cse0 main_~main__n~0)))) (or (<= c_main_~main__i~0 c_main_~main__n~0) (= (* 2 c_main_~main__sum~0) (* (+ c_main_~main__n~0 1) c_main_~main__n~0)))) is different from true [2019-09-05 13:07:16,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:07:16,408 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-09-05 13:07:16,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 13:07:16,409 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-09-05 13:07:16,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:07:16,409 INFO L225 Difference]: With dead ends: 17 [2019-09-05 13:07:16,409 INFO L226 Difference]: Without dead ends: 0 [2019-09-05 13:07:16,410 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=4, NotChecked=34, Total=380 [2019-09-05 13:07:16,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-05 13:07:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-05 13:07:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-05 13:07:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-05 13:07:16,411 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-09-05 13:07:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:07:16,411 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-05 13:07:16,411 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 13:07:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-05 13:07:16,411 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-05 13:07:16,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 01:07:16 BoogieIcfgContainer [2019-09-05 13:07:16,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 13:07:16,418 INFO L168 Benchmark]: Toolchain (without parser) took 9266.87 ms. Allocated memory was 131.1 MB in the beginning and 219.2 MB in the end (delta: 88.1 MB). Free memory was 87.5 MB in the beginning and 107.8 MB in the end (delta: -20.2 MB). Peak memory consumption was 67.8 MB. Max. memory is 7.1 GB. [2019-09-05 13:07:16,419 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 131.1 MB. Free memory was 105.2 MB in the beginning and 105.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 13:07:16,419 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.76 ms. Allocated memory is still 131.1 MB. Free memory was 87.3 MB in the beginning and 77.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-09-05 13:07:16,420 INFO L168 Benchmark]: Boogie Preprocessor took 108.23 ms. Allocated memory was 131.1 MB in the beginning and 198.2 MB in the end (delta: 67.1 MB). Free memory was 77.9 MB in the beginning and 175.0 MB in the end (delta: -97.1 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2019-09-05 13:07:16,421 INFO L168 Benchmark]: RCFGBuilder took 207.83 ms. Allocated memory is still 198.2 MB. Free memory was 175.0 MB in the beginning and 163.7 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2019-09-05 13:07:16,422 INFO L168 Benchmark]: TraceAbstraction took 8699.39 ms. Allocated memory was 198.2 MB in the beginning and 219.2 MB in the end (delta: 21.0 MB). Free memory was 163.1 MB in the beginning and 107.8 MB in the end (delta: 55.3 MB). Peak memory consumption was 76.3 MB. Max. memory is 7.1 GB. [2019-09-05 13:07:16,426 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 131.1 MB. Free memory was 105.2 MB in the beginning and 105.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 247.76 ms. Allocated memory is still 131.1 MB. Free memory was 87.3 MB in the beginning and 77.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.23 ms. Allocated memory was 131.1 MB in the beginning and 198.2 MB in the end (delta: 67.1 MB). Free memory was 77.9 MB in the beginning and 175.0 MB in the end (delta: -97.1 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 207.83 ms. Allocated memory is still 198.2 MB. Free memory was 175.0 MB in the beginning and 163.7 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8699.39 ms. Allocated memory was 198.2 MB in the beginning and 219.2 MB in the end (delta: 21.0 MB). Free memory was 163.1 MB in the beginning and 107.8 MB in the end (delta: 55.3 MB). Peak memory consumption was 76.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 16 locations, 1 error locations. SAFE Result, 8.6s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 43 SDtfs, 25 SDslu, 137 SDs, 0 SdLazy, 130 SolverSat, 11 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 7.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 7.0s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 96 ConstructedInterpolants, 7 QuantifiedInterpolants, 5404 SizeOfPredicates, 20 NumberOfNonLiveVariables, 200 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 7/38 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...