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/nla-digbench/fermat2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 13:18:39,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 13:18:39,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 13:18:39,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 13:18:39,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 13:18:39,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 13:18:39,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 13:18:39,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 13:18:39,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 13:18:39,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 13:18:39,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 13:18:39,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-05 13:18:39,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 13:18:39,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 13:18:39,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 13:18:39,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 13:18:39,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 13:18:39,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 13:18:39,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 13:18:39,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 13:18:39,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 13:18:39,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 13:18:39,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 13:18:39,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 13:18:39,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 13:18:39,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-05 13:18:39,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-05 13:18:39,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-05 13:18:39,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-05 13:18:39,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-05 13:18:39,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-05 13:18:39,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-05 13:18:39,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-05 13:18:39,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 13:18:39,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 13:18:39,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 13:18:39,106 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 13:18:39,120 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 13:18:39,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 13:18:39,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-05 13:18:39,121 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-05 13:18:39,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-05 13:18:39,122 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-05 13:18:39,122 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-05 13:18:39,122 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-05 13:18:39,123 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-05 13:18:39,123 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-05 13:18:39,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 13:18:39,124 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 13:18:39,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 13:18:39,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 13:18:39,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 13:18:39,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 13:18:39,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 13:18:39,125 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 13:18:39,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 13:18:39,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 13:18:39,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 13:18:39,126 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-05 13:18:39,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 13:18:39,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 13:18:39,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 13:18:39,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 13:18:39,127 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-05 13:18:39,127 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 13:18:39,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 13:18:39,127 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-05 13:18:39,155 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 13:18:39,168 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 13:18:39,172 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 13:18:39,173 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 13:18:39,173 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 13:18:39,174 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat2.c [2019-09-05 13:18:39,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6037c565/034c352ea77242cd83dd979b7d0585db/FLAG6637af807 [2019-09-05 13:18:39,660 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 13:18:39,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/fermat2.c [2019-09-05 13:18:39,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6037c565/034c352ea77242cd83dd979b7d0585db/FLAG6637af807 [2019-09-05 13:18:40,082 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6037c565/034c352ea77242cd83dd979b7d0585db [2019-09-05 13:18:40,098 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 13:18:40,100 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 13:18:40,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 13:18:40,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 13:18:40,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 13:18:40,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:18:40" (1/1) ... [2019-09-05 13:18:40,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18829924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:18:40, skipping insertion in model container [2019-09-05 13:18:40,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:18:40" (1/1) ... [2019-09-05 13:18:40,117 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 13:18:40,142 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 13:18:40,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:18:40,343 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 13:18:40,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:18:40,396 INFO L192 MainTranslator]: Completed translation [2019-09-05 13:18:40,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:18:40 WrapperNode [2019-09-05 13:18:40,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 13:18:40,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 13:18:40,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 13:18:40,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 13:18:40,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:18:40" (1/1) ... [2019-09-05 13:18:40,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:18:40" (1/1) ... [2019-09-05 13:18:40,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:18:40" (1/1) ... [2019-09-05 13:18:40,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:18:40" (1/1) ... [2019-09-05 13:18:40,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:18:40" (1/1) ... [2019-09-05 13:18:40,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:18:40" (1/1) ... [2019-09-05 13:18:40,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:18:40" (1/1) ... [2019-09-05 13:18:40,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 13:18:40,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 13:18:40,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 13:18:40,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 13:18:40,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:18:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 13:18:40,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 13:18:40,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 13:18:40,608 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 13:18:40,609 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 13:18:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 13:18:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2019-09-05 13:18:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 13:18:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 13:18:40,609 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 13:18:40,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 13:18:40,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 13:18:40,799 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 13:18:40,799 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 13:18:40,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:18:40 BoogieIcfgContainer [2019-09-05 13:18:40,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 13:18:40,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 13:18:40,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 13:18:40,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 13:18:40,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 01:18:40" (1/3) ... [2019-09-05 13:18:40,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb843a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:18:40, skipping insertion in model container [2019-09-05 13:18:40,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:18:40" (2/3) ... [2019-09-05 13:18:40,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bb843a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:18:40, skipping insertion in model container [2019-09-05 13:18:40,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:18:40" (3/3) ... [2019-09-05 13:18:40,834 INFO L109 eAbstractionObserver]: Analyzing ICFG fermat2.c [2019-09-05 13:18:40,849 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 13:18:40,861 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 13:18:40,908 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 13:18:40,934 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 13:18:40,934 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-05 13:18:40,935 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 13:18:40,935 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 13:18:40,935 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 13:18:40,935 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 13:18:40,935 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 13:18:40,935 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 13:18:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-05 13:18:40,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 13:18:40,957 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:18:40,958 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:18:40,960 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:18:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:18:40,964 INFO L82 PathProgramCache]: Analyzing trace with hash -858950785, now seen corresponding path program 1 times [2019-09-05 13:18:40,966 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:18:41,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:18:41,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:18:41,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:18:41,004 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:18:41,024 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:18:41,024 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:18:41,024 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 13:18:41,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:18:41,051 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:18:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:18:41,073 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-05 13:18:41,074 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 13:18:41,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:18:41,074 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:18:41,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:18:41,086 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:18:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:18:41,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2019-09-05 13:18:41,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:18:41,131 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 13:18:41,132 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:18:41,148 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 13:18:41,152 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:18:41,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-09-05 13:18:41,152 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:18:41,156 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 13:18:41,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 13:18:41,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 13:18:41,170 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-09-05 13:18:41,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:18:41,186 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-09-05 13:18:41,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 13:18:41,188 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-05 13:18:41,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:18:41,195 INFO L225 Difference]: With dead ends: 21 [2019-09-05 13:18:41,195 INFO L226 Difference]: Without dead ends: 16 [2019-09-05 13:18:41,197 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 13:18:41,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-05 13:18:41,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-05 13:18:41,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-05 13:18:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-05 13:18:41,229 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-05 13:18:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:18:41,229 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-05 13:18:41,230 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 13:18:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-05 13:18:41,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 13:18:41,231 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:18:41,231 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:18:41,231 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:18:41,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:18:41,232 INFO L82 PathProgramCache]: Analyzing trace with hash -871939661, now seen corresponding path program 1 times [2019-09-05 13:18:41,232 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:18:41,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:18:41,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:18:41,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:18:41,234 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:18:41,237 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:18:41,237 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:18:41,237 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 13:18:41,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:18:41,253 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:18:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:18:41,266 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-05 13:18:41,266 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 13:18:41,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:18:41,267 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 13:18:41,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:18:41,287 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:18:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:18:41,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-05 13:18:41,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:18:41,497 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2019-09-05 13:18:41,521 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:18:46,840 WARN L838 $PredicateComparison]: unable to prove that (or (= |c___VERIFIER_assert_#in~cond| 1) (and (= |c___VERIFIER_assert_#in~cond| 0) (exists ((v_main_~u~0_BEFORE_CALL_1 Int) (v_main_~A~0_BEFORE_CALL_1 Int)) (let ((.cse0 (div (+ (* (- 1) v_main_~u~0_BEFORE_CALL_1) 1) (- 2)))) (and (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_1 1) (- 2))) (= (mod v_main_~A~0_BEFORE_CALL_1 2) 1) (not (= (+ (+ (+ (- 1) (* v_main_~u~0_BEFORE_CALL_1 v_main_~u~0_BEFORE_CALL_1)) (- (* 2 v_main_~u~0_BEFORE_CALL_1))) 2) (+ (* 4 v_main_~A~0_BEFORE_CALL_1) (* (+ (* .cse0 .cse0) (- v_main_~A~0_BEFORE_CALL_1)) 4)))) (< (let ((.cse1 (+ .cse0 (- 1)))) (* .cse1 .cse1)) v_main_~A~0_BEFORE_CALL_1)))))) is different from false [2019-09-05 13:18:49,292 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 13:18:49,292 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:18:51,432 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 13:18:51,436 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:18:51,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-05 13:18:51,437 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:18:51,437 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 13:18:51,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 13:18:51,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=30, Unknown=2, NotChecked=10, Total=56 [2019-09-05 13:18:51,439 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-09-05 13:18:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:18:53,515 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-09-05 13:18:53,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 13:18:53,516 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-05 13:18:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:18:53,518 INFO L225 Difference]: With dead ends: 25 [2019-09-05 13:18:53,518 INFO L226 Difference]: Without dead ends: 25 [2019-09-05 13:18:53,519 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=14, Invalid=30, Unknown=2, NotChecked=10, Total=56 [2019-09-05 13:18:53,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-05 13:18:53,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-09-05 13:18:53,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-05 13:18:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-09-05 13:18:53,527 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2019-09-05 13:18:53,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:18:53,528 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-09-05 13:18:53,528 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 13:18:53,528 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-09-05 13:18:53,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-05 13:18:53,529 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:18:53,529 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:18:53,529 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:18:53,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:18:53,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1067575333, now seen corresponding path program 1 times [2019-09-05 13:18:53,530 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:18:53,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:18:53,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:18:53,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:18:53,531 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:18:53,534 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:18:53,534 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:18:53,534 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 13:18:53,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:18:53,558 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:18:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:18:53,577 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-09-05 13:18:53,579 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [32], [35], [37], [40], [42], [43], [44], [45], [47], [48], [49] [2019-09-05 13:18:53,626 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:18:53,626 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:18:53,752 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-05 13:18:54,913 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:18:54,918 INFO L272 AbstractInterpreter]: Visited 15 different actions 20 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 14. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 7 variables. [2019-09-05 13:18:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:18:54,928 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:18:54,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:18:54,929 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:18:54,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:18:54,958 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:18:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:18:54,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-05 13:18:54,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:18:55,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:18:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:18:55,223 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:18:55,325 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:18:55,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:18:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:18:55,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 13:18:55,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-09-05 13:18:55,370 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:18:55,370 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 13:18:55,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 13:18:55,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=121, Unknown=1, NotChecked=0, Total=156 [2019-09-05 13:18:55,372 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 13 states. [2019-09-05 13:18:55,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:18:55,675 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-09-05 13:18:55,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 13:18:55,676 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-09-05 13:18:55,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:18:55,678 INFO L225 Difference]: With dead ends: 31 [2019-09-05 13:18:55,678 INFO L226 Difference]: Without dead ends: 29 [2019-09-05 13:18:55,679 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=183, Unknown=1, NotChecked=0, Total=240 [2019-09-05 13:18:55,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-05 13:18:55,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2019-09-05 13:18:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-05 13:18:55,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-05 13:18:55,684 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2019-09-05 13:18:55,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:18:55,684 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-05 13:18:55,685 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 13:18:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-05 13:18:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-05 13:18:55,685 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:18:55,686 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:18:55,686 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:18:55,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:18:55,686 INFO L82 PathProgramCache]: Analyzing trace with hash 427538464, now seen corresponding path program 1 times [2019-09-05 13:18:55,687 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:18:55,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:18:55,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:18:55,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:18:55,688 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:18:55,690 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:18:55,690 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:18:55,690 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 13:18:55,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:18:55,712 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:18:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:18:55,724 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2019-09-05 13:18:55,725 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [22], [32], [35], [37], [40], [42], [43], [44], [45], [47], [48] [2019-09-05 13:18:55,729 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:18:55,729 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:18:55,741 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-05 13:18:56,504 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:18:56,511 INFO L272 AbstractInterpreter]: Visited 15 different actions 65 times. Merged at 4 different actions 20 times. Widened at 1 different actions 1 times. Performed 110 root evaluator evaluations with a maximum evaluation depth of 14. Performed 110 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 7 variables. [2019-09-05 13:18:56,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:18:56,512 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:18:56,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:18:56,512 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 13:18:56,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:18:56,535 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:18:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:18:56,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-05 13:18:56,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:18:56,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:18:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:18:56,736 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:18:56,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:18:56,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:18:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:18:56,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 13:18:56,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2019-09-05 13:18:56,871 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:18:56,872 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-05 13:18:56,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-05 13:18:56,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-09-05 13:18:56,872 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 12 states. [2019-09-05 13:18:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:18:57,015 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-09-05 13:18:57,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 13:18:57,015 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2019-09-05 13:18:57,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:18:57,016 INFO L225 Difference]: With dead ends: 25 [2019-09-05 13:18:57,016 INFO L226 Difference]: Without dead ends: 0 [2019-09-05 13:18:57,017 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-09-05 13:18:57,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-05 13:18:57,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-05 13:18:57,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-05 13:18:57,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-05 13:18:57,017 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-09-05 13:18:57,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:18:57,018 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-05 13:18:57,018 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-05 13:18:57,018 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-05 13:18:57,018 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-05 13:18:57,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 01:18:57 BoogieIcfgContainer [2019-09-05 13:18:57,023 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 13:18:57,026 INFO L168 Benchmark]: Toolchain (without parser) took 16925.42 ms. Allocated memory was 133.2 MB in the beginning and 342.4 MB in the end (delta: 209.2 MB). Free memory was 87.6 MB in the beginning and 282.1 MB in the end (delta: -194.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2019-09-05 13:18:57,027 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 133.2 MB. Free memory was 106.0 MB in the beginning and 105.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 13:18:57,027 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.22 ms. Allocated memory is still 133.2 MB. Free memory was 87.4 MB in the beginning and 77.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-09-05 13:18:57,028 INFO L168 Benchmark]: Boogie Preprocessor took 156.75 ms. Allocated memory was 133.2 MB in the beginning and 200.8 MB in the end (delta: 67.6 MB). Free memory was 77.8 MB in the beginning and 177.3 MB in the end (delta: -99.5 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-09-05 13:18:57,029 INFO L168 Benchmark]: RCFGBuilder took 246.62 ms. Allocated memory is still 200.8 MB. Free memory was 176.7 MB in the beginning and 165.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-09-05 13:18:57,030 INFO L168 Benchmark]: TraceAbstraction took 16210.53 ms. Allocated memory was 200.8 MB in the beginning and 342.4 MB in the end (delta: 141.6 MB). Free memory was 165.3 MB in the beginning and 282.1 MB in the end (delta: -116.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. [2019-09-05 13:18:57,034 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 133.2 MB. Free memory was 106.0 MB in the beginning and 105.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 296.22 ms. Allocated memory is still 133.2 MB. Free memory was 87.4 MB in the beginning and 77.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 156.75 ms. Allocated memory was 133.2 MB in the beginning and 200.8 MB in the end (delta: 67.6 MB). Free memory was 77.8 MB in the beginning and 177.3 MB in the end (delta: -99.5 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 246.62 ms. Allocated memory is still 200.8 MB. Free memory was 176.7 MB in the beginning and 165.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 16210.53 ms. Allocated memory was 200.8 MB in the beginning and 342.4 MB in the end (delta: 141.6 MB). Free memory was 165.3 MB in the beginning and 282.1 MB in the end (delta: -116.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: 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 4 procedures, 21 locations, 1 error locations. SAFE Result, 16.0s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 2.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 57 SDtfs, 37 SDslu, 173 SDs, 0 SdLazy, 171 SolverSat, 17 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 108 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 2.1s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 10.8s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 100 ConstructedInterpolants, 11 QuantifiedInterpolants, 11509 SizeOfPredicates, 17 NumberOfNonLiveVariables, 155 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...