java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/mannadiv.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:17:24,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:17:24,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:17:24,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:17:24,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:17:24,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:17:24,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:17:24,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:17:24,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:17:24,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:17:24,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:17:24,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:17:24,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:17:24,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:17:24,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:17:24,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:17:24,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:17:24,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:17:24,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:17:24,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:17:24,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:17:24,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:17:24,311 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:17:24,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:17:24,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:17:24,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:17:24,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:17:24,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:17:24,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:17:24,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:17:24,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:17:24,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:17:24,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:17:24,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:17:24,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:17:24,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:17:24,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:17:24,350 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:17:24,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:17:24,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:17:24,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:17:24,353 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:17:24,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:17:24,354 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:17:24,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:17:24,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:17:24,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:17:24,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:17:24,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:17:24,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:17:24,356 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:17:24,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:17:24,357 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:17:24,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:17:24,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:17:24,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:17:24,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:17:24,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:17:24,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:24,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:17:24,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:17:24,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:17:24,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:17:24,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:17:24,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:17:24,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:17:24,625 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:17:24,648 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:17:24,651 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:17:24,653 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:17:24,653 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:17:24,654 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/mannadiv.c [2019-10-14 23:17:24,734 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18e1bc0c7/62370cf707bd4ce896c8c2f150305cf9/FLAGde805ee5b [2019-10-14 23:17:25,178 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:17:25,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/mannadiv.c [2019-10-14 23:17:25,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18e1bc0c7/62370cf707bd4ce896c8c2f150305cf9/FLAGde805ee5b [2019-10-14 23:17:25,592 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18e1bc0c7/62370cf707bd4ce896c8c2f150305cf9 [2019-10-14 23:17:25,603 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:17:25,607 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:17:25,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:25,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:17:25,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:17:25,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:25" (1/1) ... [2019-10-14 23:17:25,618 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54268d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:25, skipping insertion in model container [2019-10-14 23:17:25,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:25" (1/1) ... [2019-10-14 23:17:25,628 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:17:25,654 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:17:25,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:25,901 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:17:25,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:25,936 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:17:25,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:25 WrapperNode [2019-10-14 23:17:25,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:25,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:17:25,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:17:25,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:17:26,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:25" (1/1) ... [2019-10-14 23:17:26,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:25" (1/1) ... [2019-10-14 23:17:26,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:25" (1/1) ... [2019-10-14 23:17:26,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:25" (1/1) ... [2019-10-14 23:17:26,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:25" (1/1) ... [2019-10-14 23:17:26,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:25" (1/1) ... [2019-10-14 23:17:26,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:25" (1/1) ... [2019-10-14 23:17:26,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:17:26,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:17:26,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:17:26,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:17:26,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:26,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:17:26,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:17:26,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:17:26,129 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:17:26,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:17:26,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:17:26,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:17:26,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:17:26,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:17:26,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:17:26,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:17:26,310 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:17:26,310 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:17:26,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:26 BoogieIcfgContainer [2019-10-14 23:17:26,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:17:26,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:17:26,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:17:26,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:17:26,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:17:25" (1/3) ... [2019-10-14 23:17:26,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7508831b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:26, skipping insertion in model container [2019-10-14 23:17:26,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:25" (2/3) ... [2019-10-14 23:17:26,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7508831b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:26, skipping insertion in model container [2019-10-14 23:17:26,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:26" (3/3) ... [2019-10-14 23:17:26,319 INFO L109 eAbstractionObserver]: Analyzing ICFG mannadiv.c [2019-10-14 23:17:26,329 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:17:26,338 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:17:26,350 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:17:26,372 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:17:26,372 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:17:26,372 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:17:26,372 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:17:26,373 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:17:26,373 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:17:26,373 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:17:26,373 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:17:26,387 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-14 23:17:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:26,393 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:26,394 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:26,395 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:26,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:26,401 INFO L82 PathProgramCache]: Analyzing trace with hash -858950785, now seen corresponding path program 1 times [2019-10-14 23:17:26,410 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:26,411 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701123249] [2019-10-14 23:17:26,411 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:26,411 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:26,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:26,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701123249] [2019-10-14 23:17:26,521 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:26,521 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:17:26,522 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262636053] [2019-10-14 23:17:26,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:17:26,526 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:26,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:17:26,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:26,539 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-10-14 23:17:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:26,565 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2019-10-14 23:17:26,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:17:26,568 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:17:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:26,579 INFO L225 Difference]: With dead ends: 37 [2019-10-14 23:17:26,580 INFO L226 Difference]: Without dead ends: 16 [2019-10-14 23:17:26,586 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:26,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-14 23:17:26,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-14 23:17:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-14 23:17:26,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-14 23:17:26,637 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-10-14 23:17:26,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:26,637 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-14 23:17:26,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:17:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-14 23:17:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:26,641 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:26,641 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:26,641 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:26,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:26,643 INFO L82 PathProgramCache]: Analyzing trace with hash -871939661, now seen corresponding path program 1 times [2019-10-14 23:17:26,643 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:26,644 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790286286] [2019-10-14 23:17:26,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:26,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:26,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:26,663 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:26,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602577097] [2019-10-14 23:17:26,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:26,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:17:26,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:26,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790286286] [2019-10-14 23:17:26,834 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:26,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602577097] [2019-10-14 23:17:26,835 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:26,835 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:26,835 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68344091] [2019-10-14 23:17:26,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:26,837 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:26,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:26,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:26,838 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-10-14 23:17:26,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:26,926 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-10-14 23:17:26,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:26,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-14 23:17:26,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:26,928 INFO L225 Difference]: With dead ends: 27 [2019-10-14 23:17:26,929 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 23:17:26,930 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:26,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 23:17:26,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-10-14 23:17:26,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 23:17:26,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-14 23:17:26,939 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2019-10-14 23:17:26,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:26,939 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-14 23:17:26,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:26,940 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-14 23:17:26,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:17:26,941 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:26,941 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:27,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:27,146 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:27,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1067575333, now seen corresponding path program 1 times [2019-10-14 23:17:27,148 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:27,148 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637766073] [2019-10-14 23:17:27,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:27,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:27,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:27,161 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:27,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026159075] [2019-10-14 23:17:27,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:27,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:17:27,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:27,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637766073] [2019-10-14 23:17:27,294 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:27,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026159075] [2019-10-14 23:17:27,294 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:27,295 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:17:27,295 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168429536] [2019-10-14 23:17:27,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:17:27,296 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:27,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:17:27,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:27,297 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2019-10-14 23:17:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:27,400 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2019-10-14 23:17:27,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:27,401 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-10-14 23:17:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:27,402 INFO L225 Difference]: With dead ends: 31 [2019-10-14 23:17:27,403 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 23:17:27,403 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 23:17:27,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-10-14 23:17:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 23:17:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-14 23:17:27,410 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2019-10-14 23:17:27,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:27,410 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-14 23:17:27,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:17:27,411 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-14 23:17:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:17:27,411 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:27,412 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:27,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:27,615 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:27,616 INFO L82 PathProgramCache]: Analyzing trace with hash 427538464, now seen corresponding path program 1 times [2019-10-14 23:17:27,616 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:27,617 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258639798] [2019-10-14 23:17:27,617 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:27,617 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:27,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:27,624 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:27,624 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674672560] [2019-10-14 23:17:27,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2019-10-14 23:17:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:27,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:17:27,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:27,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258639798] [2019-10-14 23:17:27,726 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:27,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674672560] [2019-10-14 23:17:27,727 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:27,727 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:17:27,727 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089956743] [2019-10-14 23:17:27,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:17:27,728 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:27,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:17:27,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:27,729 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2019-10-14 23:17:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:27,824 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-10-14 23:17:27,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:27,824 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-14 23:17:27,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:27,825 INFO L225 Difference]: With dead ends: 44 [2019-10-14 23:17:27,825 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:17:27,826 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:27,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:17:27,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-14 23:17:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:17:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-14 23:17:27,833 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 18 [2019-10-14 23:17:27,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:27,834 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-14 23:17:27,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:17:27,834 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-14 23:17:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:17:27,835 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:27,835 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:28,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:28,046 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:28,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:28,047 INFO L82 PathProgramCache]: Analyzing trace with hash 484796766, now seen corresponding path program 1 times [2019-10-14 23:17:28,047 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:28,047 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111633761] [2019-10-14 23:17:28,047 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:28,048 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:28,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:28,054 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:28,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682481727] [2019-10-14 23:17:28,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:28,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:17:28,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:28,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111633761] [2019-10-14 23:17:28,148 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:28,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682481727] [2019-10-14 23:17:28,148 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:28,148 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:17:28,149 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075410047] [2019-10-14 23:17:28,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:17:28,149 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:28,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:17:28,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:28,150 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2019-10-14 23:17:28,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:28,234 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-10-14 23:17:28,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:28,235 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-14 23:17:28,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:28,236 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:17:28,236 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:17:28,237 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:17:28,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:17:28,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-10-14 23:17:28,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 23:17:28,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-10-14 23:17:28,245 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 18 [2019-10-14 23:17:28,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:28,245 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-10-14 23:17:28,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:17:28,245 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-10-14 23:17:28,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:17:28,246 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:28,247 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:28,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:28,452 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:28,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1265440978, now seen corresponding path program 1 times [2019-10-14 23:17:28,453 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:28,454 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497988814] [2019-10-14 23:17:28,454 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:28,455 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:28,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:28,461 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:28,462 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570047625] [2019-10-14 23:17:28,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2019-10-14 23:17:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:28,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:17:28,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:17:28,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497988814] [2019-10-14 23:17:28,557 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:28,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570047625] [2019-10-14 23:17:28,557 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:28,557 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:28,558 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832581912] [2019-10-14 23:17:28,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:28,558 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:28,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:28,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:28,559 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 9 states. [2019-10-14 23:17:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:28,641 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2019-10-14 23:17:28,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:28,642 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-10-14 23:17:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:28,642 INFO L225 Difference]: With dead ends: 38 [2019-10-14 23:17:28,643 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:17:28,643 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:17:28,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:17:28,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:17:28,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:17:28,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:17:28,644 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2019-10-14 23:17:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:28,645 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:17:28,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:28,645 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:17:28,645 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:17:28,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:28,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:17:28,958 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-14 23:17:28,958 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:17:28,958 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:17:28,959 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:17:28,959 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:17:28,959 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:17:28,959 INFO L439 ceAbstractionStarter]: At program point L35-2(lines 30 43) the Hoare annotation is: (and (not (= 0 main_~x2~0)) (= (+ main_~y2~0 main_~y3~0 (* main_~y1~0 main_~x2~0)) main_~x1~0)) [2019-10-14 23:17:28,959 INFO L439 ceAbstractionStarter]: At program point L31(line 31) the Hoare annotation is: (and (not (= 0 main_~x2~0)) (= (+ main_~y2~0 main_~y3~0 (* main_~y1~0 main_~x2~0)) main_~x1~0)) [2019-10-14 23:17:28,960 INFO L443 ceAbstractionStarter]: For program point L31-1(lines 30 43) no Hoare annotation was computed. [2019-10-14 23:17:28,960 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 17 46) no Hoare annotation was computed. [2019-10-14 23:17:28,960 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 17 46) no Hoare annotation was computed. [2019-10-14 23:17:28,960 INFO L443 ceAbstractionStarter]: For program point L44(line 44) no Hoare annotation was computed. [2019-10-14 23:17:28,960 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 17 46) the Hoare annotation is: true [2019-10-14 23:17:28,960 INFO L439 ceAbstractionStarter]: At program point L30-2(lines 30 43) the Hoare annotation is: (let ((.cse0 (* main_~y1~0 main_~x2~0))) (and (= (+ main_~y2~0 .cse0) main_~x1~0) (not (= 0 main_~x2~0)) (= (+ main_~y2~0 main_~y3~0 .cse0) main_~x1~0))) [2019-10-14 23:17:28,961 INFO L443 ceAbstractionStarter]: For program point L35(lines 35 42) no Hoare annotation was computed. [2019-10-14 23:17:28,961 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2019-10-14 23:17:28,961 INFO L443 ceAbstractionStarter]: For program point L12(lines 12 13) no Hoare annotation was computed. [2019-10-14 23:17:28,961 INFO L443 ceAbstractionStarter]: For program point L11(lines 11 14) no Hoare annotation was computed. [2019-10-14 23:17:28,961 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2019-10-14 23:17:28,961 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2019-10-14 23:17:28,961 INFO L443 ceAbstractionStarter]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2019-10-14 23:17:28,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:17:28 BoogieIcfgContainer [2019-10-14 23:17:28,976 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:17:28,981 INFO L168 Benchmark]: Toolchain (without parser) took 3372.73 ms. Allocated memory was 138.9 MB in the beginning and 234.4 MB in the end (delta: 95.4 MB). Free memory was 103.6 MB in the beginning and 144.9 MB in the end (delta: -41.3 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:28,987 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 138.9 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-14 23:17:28,988 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.05 ms. Allocated memory is still 138.9 MB. Free memory was 103.4 MB in the beginning and 93.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:28,990 INFO L168 Benchmark]: Boogie Preprocessor took 130.07 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 93.8 MB in the beginning and 181.9 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:28,991 INFO L168 Benchmark]: RCFGBuilder took 242.89 ms. Allocated memory is still 203.9 MB. Free memory was 181.9 MB in the beginning and 170.5 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:28,992 INFO L168 Benchmark]: TraceAbstraction took 2663.15 ms. Allocated memory was 203.9 MB in the beginning and 234.4 MB in the end (delta: 30.4 MB). Free memory was 170.5 MB in the beginning and 144.9 MB in the end (delta: 25.6 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:29,000 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 138.9 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 329.05 ms. Allocated memory is still 138.9 MB. Free memory was 103.4 MB in the beginning and 93.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.07 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 93.8 MB in the beginning and 181.9 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 242.89 ms. Allocated memory is still 203.9 MB. Free memory was 181.9 MB in the beginning and 170.5 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2663.15 ms. Allocated memory was 203.9 MB in the beginning and 234.4 MB in the end (delta: 30.4 MB). Free memory was 170.5 MB in the beginning and 144.9 MB in the end (delta: 25.6 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: !(0 == x2) && y2 + y3 + y1 * x2 == x1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Result: SAFE, OverallTime: 2.5s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 86 SDtfs, 38 SDslu, 223 SDs, 0 SdLazy, 207 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 17 PreInvPairs, 27 NumberOfFragments, 51 HoareAnnotationTreeSize, 17 FomulaSimplifications, 148 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 18 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 6713 SizeOfPredicates, 13 NumberOfNonLiveVariables, 256 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 16/21 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...