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/sqrt1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:17:43,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:17:43,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:17:43,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:17:43,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:17:43,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:17:43,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:17:43,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:17:43,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:17:43,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:17:43,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:17:43,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:17:43,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:17:43,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:17:43,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:17:43,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:17:43,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:17:43,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:17:43,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:17:43,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:17:43,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:17:43,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:17:43,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:17:43,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:17:43,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:17:43,863 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:17:43,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:17:43,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:17:43,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:17:43,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:17:43,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:17:43,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:17:43,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:17:43,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:17:43,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:17:43,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:17:43,875 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 23:17:43,896 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:17:43,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:17:43,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:17:43,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:17:43,899 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:17:43,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:17:43,900 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:17:43,900 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:17:43,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:17:43,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:17:43,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:17:43,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:17:43,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:17:43,902 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:17:43,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:17:43,902 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:17:43,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:17:43,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:17:43,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:17:43,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:17:43,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:17:43,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:17:43,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:17:43,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:17:43,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:17:43,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:17:43,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:17:43,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:17:43,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:17:44,157 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:17:44,176 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:17:44,179 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:17:44,181 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:17:44,181 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:17:44,182 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1.c [2019-10-14 23:17:44,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b470bcd61/64edf6199937441596889c9b81513a86/FLAGb1bc4e182 [2019-10-14 23:17:44,662 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:17:44,665 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1.c [2019-10-14 23:17:44,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b470bcd61/64edf6199937441596889c9b81513a86/FLAGb1bc4e182 [2019-10-14 23:17:45,025 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b470bcd61/64edf6199937441596889c9b81513a86 [2019-10-14 23:17:45,035 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:17:45,036 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:17:45,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:45,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:17:45,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:17:45,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:45" (1/1) ... [2019-10-14 23:17:45,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35a8eca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45, skipping insertion in model container [2019-10-14 23:17:45,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:17:45" (1/1) ... [2019-10-14 23:17:45,050 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:17:45,065 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:17:45,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:45,312 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:17:45,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:17:45,358 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:17:45,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45 WrapperNode [2019-10-14 23:17:45,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:17:45,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:17:45,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:17:45,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:17:45,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (1/1) ... [2019-10-14 23:17:45,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (1/1) ... [2019-10-14 23:17:45,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (1/1) ... [2019-10-14 23:17:45,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (1/1) ... [2019-10-14 23:17:45,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (1/1) ... [2019-10-14 23:17:45,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (1/1) ... [2019-10-14 23:17:45,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (1/1) ... [2019-10-14 23:17:45,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:17:45,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:17:45,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:17:45,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:17:45,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (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 23:17:45,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:17:45,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:17:45,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:17:45,529 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:17:45,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:17:45,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:17:45,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:17:45,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:17:45,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:17:45,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:17:45,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:17:45,708 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:17:45,709 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:17:45,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:45 BoogieIcfgContainer [2019-10-14 23:17:45,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:17:45,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:17:45,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:17:45,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:17:45,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:17:45" (1/3) ... [2019-10-14 23:17:45,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1817eef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:45, skipping insertion in model container [2019-10-14 23:17:45,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:17:45" (2/3) ... [2019-10-14 23:17:45,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1817eef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:17:45, skipping insertion in model container [2019-10-14 23:17:45,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:17:45" (3/3) ... [2019-10-14 23:17:45,718 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt1.c [2019-10-14 23:17:45,729 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:17:45,737 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:17:45,752 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:17:45,780 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:17:45,780 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:17:45,780 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:17:45,781 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:17:45,781 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:17:45,781 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:17:45,781 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:17:45,782 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:17:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-14 23:17:45,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:45,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:45,811 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:45,814 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:45,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:45,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1435220999, now seen corresponding path program 1 times [2019-10-14 23:17:45,831 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:45,832 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952630905] [2019-10-14 23:17:45,832 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:45,832 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:45,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:45,966 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 23:17:45,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952630905] [2019-10-14 23:17:45,968 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:45,968 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:17:45,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51642972] [2019-10-14 23:17:45,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:17:45,973 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:45,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:17:45,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:17:45,990 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2019-10-14 23:17:46,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:46,013 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2019-10-14 23:17:46,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:17:46,014 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-14 23:17:46,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:46,024 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:17:46,024 INFO L226 Difference]: Without dead ends: 19 [2019-10-14 23:17:46,029 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 23:17:46,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-14 23:17:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-14 23:17:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 23:17:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-10-14 23:17:46,070 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2019-10-14 23:17:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:46,070 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-10-14 23:17:46,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:17:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-10-14 23:17:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:17:46,073 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:46,074 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:46,074 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:46,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:46,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1444634955, now seen corresponding path program 1 times [2019-10-14 23:17:46,076 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:46,076 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606468309] [2019-10-14 23:17:46,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:46,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:46,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:46,205 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 23:17:46,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606468309] [2019-10-14 23:17:46,207 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:17:46,207 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:17:46,207 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357707121] [2019-10-14 23:17:46,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:17:46,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:46,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:17:46,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:17:46,211 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2019-10-14 23:17:46,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:46,309 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-10-14 23:17:46,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:17:46,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-14 23:17:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:46,315 INFO L225 Difference]: With dead ends: 25 [2019-10-14 23:17:46,315 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 23:17:46,317 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:17:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 23:17:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 23:17:46,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 23:17:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-10-14 23:17:46,337 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2019-10-14 23:17:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:46,338 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-10-14 23:17:46,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:17:46,338 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-10-14 23:17:46,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 23:17:46,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:46,339 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:46,340 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:46,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:46,341 INFO L82 PathProgramCache]: Analyzing trace with hash -892290774, now seen corresponding path program 1 times [2019-10-14 23:17:46,341 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:46,342 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096005498] [2019-10-14 23:17:46,343 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:46,343 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:46,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:46,357 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:46,358 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512006835] [2019-10-14 23:17:46,358 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 23:17:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:46,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:17:46,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:17:46,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096005498] [2019-10-14 23:17:46,504 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:46,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512006835] [2019-10-14 23:17:46,504 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:46,504 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:17:46,505 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260822794] [2019-10-14 23:17:46,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:17:46,507 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:46,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:17:46,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:46,508 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 8 states. [2019-10-14 23:17:46,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:46,726 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2019-10-14 23:17:46,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:17:46,727 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-10-14 23:17:46,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:46,728 INFO L225 Difference]: With dead ends: 41 [2019-10-14 23:17:46,729 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:17:46,729 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:46,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:17:46,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-14 23:17:46,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 23:17:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-10-14 23:17:46,743 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 15 [2019-10-14 23:17:46,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:46,743 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-10-14 23:17:46,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:17:46,744 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-10-14 23:17:46,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:17:46,745 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:46,745 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:46,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:46,950 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:46,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:46,951 INFO L82 PathProgramCache]: Analyzing trace with hash -751011113, now seen corresponding path program 1 times [2019-10-14 23:17:46,952 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:46,952 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921692786] [2019-10-14 23:17:46,953 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:46,953 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:46,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:46,970 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:46,970 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676979692] [2019-10-14 23:17:46,970 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 23:17:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:17:47,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:47,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:17:47,132 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921692786] [2019-10-14 23:17:47,132 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:47,132 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676979692] [2019-10-14 23:17:47,133 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:47,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:17:47,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92403571] [2019-10-14 23:17:47,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:17:47,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:47,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:17:47,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:17:47,136 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 8 states. [2019-10-14 23:17:47,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:47,467 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2019-10-14 23:17:47,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:47,470 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-10-14 23:17:47,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:47,471 INFO L225 Difference]: With dead ends: 50 [2019-10-14 23:17:47,472 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 23:17:47,475 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:47,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 23:17:47,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-10-14 23:17:47,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:17:47,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2019-10-14 23:17:47,496 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 32 [2019-10-14 23:17:47,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:47,498 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2019-10-14 23:17:47,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:17:47,499 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2019-10-14 23:17:47,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:17:47,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:47,500 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:47,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:47,701 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:47,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:47,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2078000632, now seen corresponding path program 2 times [2019-10-14 23:17:47,702 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:47,702 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313375423] [2019-10-14 23:17:47,702 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:47,702 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:47,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:47,710 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:47,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153897240] [2019-10-14 23:17:47,711 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:47,740 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:17:47,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:47,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:17:47,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 23:17:47,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313375423] [2019-10-14 23:17:47,825 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:47,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153897240] [2019-10-14 23:17:47,825 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:47,826 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:47,826 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490230810] [2019-10-14 23:17:47,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:47,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:47,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:47,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:47,828 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 9 states. [2019-10-14 23:17:48,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:48,046 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-14 23:17:48,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:17:48,046 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-10-14 23:17:48,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:48,048 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:17:48,048 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 23:17:48,049 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:17:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 23:17:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-14 23:17:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 23:17:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2019-10-14 23:17:48,067 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 37 [2019-10-14 23:17:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:48,068 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2019-10-14 23:17:48,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2019-10-14 23:17:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 23:17:48,070 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:48,070 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:48,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:48,275 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:48,276 INFO L82 PathProgramCache]: Analyzing trace with hash 541108426, now seen corresponding path program 3 times [2019-10-14 23:17:48,276 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:48,277 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358166561] [2019-10-14 23:17:48,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:48,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:48,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:48,284 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:48,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165900449] [2019-10-14 23:17:48,284 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:17:48,315 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:17:48,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:48,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 23:17:48,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:48,428 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-14 23:17:48,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358166561] [2019-10-14 23:17:48,429 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:48,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165900449] [2019-10-14 23:17:48,429 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:48,429 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:17:48,430 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334250707] [2019-10-14 23:17:48,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:17:48,431 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:48,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:17:48,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:48,431 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 10 states. [2019-10-14 23:17:48,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:48,700 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2019-10-14 23:17:48,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:17:48,701 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2019-10-14 23:17:48,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:48,703 INFO L225 Difference]: With dead ends: 71 [2019-10-14 23:17:48,703 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 23:17:48,703 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:17:48,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 23:17:48,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-10-14 23:17:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 23:17:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2019-10-14 23:17:48,715 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 49 [2019-10-14 23:17:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:48,716 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2019-10-14 23:17:48,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:17:48,716 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2019-10-14 23:17:48,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 23:17:48,718 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:17:48,718 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:17:48,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:48,924 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:17:48,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:17:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash 922074935, now seen corresponding path program 4 times [2019-10-14 23:17:48,925 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:17:48,925 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439402377] [2019-10-14 23:17:48,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:48,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:17:48,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:17:48,936 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:17:48,938 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933101700] [2019-10-14 23:17:48,938 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-14 23:17:48,977 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:17:48,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:17:48,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-14 23:17:48,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:17:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 40 proven. 58 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-14 23:17:49,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439402377] [2019-10-14 23:17:49,086 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:17:49,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933101700] [2019-10-14 23:17:49,086 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:17:49,087 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:17:49,087 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101539579] [2019-10-14 23:17:49,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:17:49,088 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:17:49,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:17:49,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:17:49,088 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 9 states. [2019-10-14 23:17:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:17:49,156 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2019-10-14 23:17:49,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:17:49,157 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2019-10-14 23:17:49,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:17:49,158 INFO L225 Difference]: With dead ends: 66 [2019-10-14 23:17:49,158 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:17:49,159 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:17:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:17:49,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:17:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:17:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:17:49,160 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2019-10-14 23:17:49,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:17:49,160 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:17:49,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:17:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:17:49,161 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:17:49,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:17:49,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:17:49,642 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-14 23:17:49,643 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:17:49,643 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:17:49,643 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:17:49,643 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:17:49,643 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:17:49,643 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 15 42) the Hoare annotation is: true [2019-10-14 23:17:49,643 INFO L443 ceAbstractionStarter]: For program point L26(lines 23 35) no Hoare annotation was computed. [2019-10-14 23:17:49,643 INFO L439 ceAbstractionStarter]: At program point L25(line 25) the Hoare annotation is: (let ((.cse1 (+ (* 2 main_~a~0) 1))) (and (= (let ((.cse0 (+ main_~a~0 1))) (* .cse0 .cse0)) main_~s~0) (<= .cse1 main_~t~0) (<= main_~t~0 .cse1))) [2019-10-14 23:17:49,643 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 15 42) no Hoare annotation was computed. [2019-10-14 23:17:49,644 INFO L439 ceAbstractionStarter]: At program point L24(line 24) the Hoare annotation is: (let ((.cse1 (+ (* 2 main_~a~0) 1))) (and (= (let ((.cse0 (+ main_~a~0 1))) (* .cse0 .cse0)) main_~s~0) (<= .cse1 main_~t~0) (<= main_~t~0 .cse1))) [2019-10-14 23:17:49,644 INFO L439 ceAbstractionStarter]: At program point L24-1(line 24) the Hoare annotation is: (let ((.cse1 (+ (* 2 main_~a~0) 1))) (and (= (let ((.cse0 (+ main_~a~0 1))) (* .cse0 .cse0)) main_~s~0) (<= .cse1 main_~t~0) (<= main_~t~0 .cse1))) [2019-10-14 23:17:49,644 INFO L439 ceAbstractionStarter]: At program point L23-2(lines 23 35) the Hoare annotation is: (let ((.cse1 (+ (* 2 main_~a~0) 1))) (and (= (let ((.cse0 (+ main_~a~0 1))) (* .cse0 .cse0)) main_~s~0) (<= .cse1 main_~t~0) (<= main_~t~0 .cse1))) [2019-10-14 23:17:49,644 INFO L439 ceAbstractionStarter]: At program point L23-3(lines 23 35) the Hoare annotation is: (let ((.cse1 (+ (* 2 main_~a~0) 1))) (and (= (let ((.cse0 (+ main_~a~0 1))) (* .cse0 .cse0)) main_~s~0) (<= .cse1 main_~t~0) (<= main_~t~0 .cse1))) [2019-10-14 23:17:49,644 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 15 42) no Hoare annotation was computed. [2019-10-14 23:17:49,645 INFO L443 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-10-14 23:17:49,645 INFO L439 ceAbstractionStarter]: At program point L38(line 38) the Hoare annotation is: (let ((.cse1 (+ (* 2 main_~a~0) 1))) (and (= (let ((.cse0 (+ main_~a~0 1))) (* .cse0 .cse0)) main_~s~0) (<= .cse1 main_~t~0) (<= main_~t~0 .cse1))) [2019-10-14 23:17:49,645 INFO L439 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (let ((.cse1 (+ (* 2 main_~a~0) 1))) (and (= (let ((.cse0 (+ main_~a~0 1))) (* .cse0 .cse0)) main_~s~0) (<= .cse1 main_~t~0) (<= main_~t~0 .cse1))) [2019-10-14 23:17:49,645 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 6 12) the Hoare annotation is: true [2019-10-14 23:17:49,645 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2019-10-14 23:17:49,645 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 6 12) no Hoare annotation was computed. [2019-10-14 23:17:49,646 INFO L443 ceAbstractionStarter]: For program point L8(lines 8 9) no Hoare annotation was computed. [2019-10-14 23:17:49,646 INFO L443 ceAbstractionStarter]: For program point L7(lines 7 10) no Hoare annotation was computed. [2019-10-14 23:17:49,646 INFO L443 ceAbstractionStarter]: For program point L7-2(lines 6 12) no Hoare annotation was computed. [2019-10-14 23:17:49,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:17:49 BoogieIcfgContainer [2019-10-14 23:17:49,659 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:17:49,661 INFO L168 Benchmark]: Toolchain (without parser) took 4624.28 ms. Allocated memory was 136.8 MB in the beginning and 250.1 MB in the end (delta: 113.2 MB). Free memory was 100.5 MB in the beginning and 152.7 MB in the end (delta: -52.2 MB). Peak memory consumption was 61.1 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:49,662 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 136.8 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-10-14 23:17:49,663 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.08 ms. Allocated memory is still 136.8 MB. Free memory was 100.3 MB in the beginning and 90.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:49,664 INFO L168 Benchmark]: Boogie Preprocessor took 114.29 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.7 MB in the beginning and 179.0 MB in the end (delta: -88.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:49,665 INFO L168 Benchmark]: RCFGBuilder took 236.14 ms. Allocated memory is still 200.8 MB. Free memory was 179.0 MB in the beginning and 167.8 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:49,666 INFO L168 Benchmark]: TraceAbstraction took 3947.15 ms. Allocated memory was 200.8 MB in the beginning and 250.1 MB in the end (delta: 49.3 MB). Free memory was 167.2 MB in the beginning and 152.7 MB in the end (delta: 14.5 MB). Peak memory consumption was 63.8 MB. Max. memory is 7.1 GB. [2019-10-14 23:17:49,670 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 136.8 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 322.08 ms. Allocated memory is still 136.8 MB. Free memory was 100.3 MB in the beginning and 90.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.29 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.7 MB in the beginning and 179.0 MB in the end (delta: -88.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 236.14 ms. Allocated memory is still 200.8 MB. Free memory was 179.0 MB in the beginning and 167.8 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3947.15 ms. Allocated memory was 200.8 MB in the beginning and 250.1 MB in the end (delta: 49.3 MB). Free memory was 167.2 MB in the beginning and 152.7 MB in the end (delta: 14.5 MB). Peak memory consumption was 63.8 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 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((a + 1) * (a + 1) == s && 2 * a + 1 <= t) && t <= 2 * a + 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Result: SAFE, OverallTime: 3.8s, OverallIterations: 7, TraceHistogramMax: 11, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 133 SDtfs, 71 SDslu, 435 SDs, 0 SdLazy, 650 SolverSat, 72 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 215 GetRequests, 165 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 41 PreInvPairs, 69 NumberOfFragments, 173 HoareAnnotationTreeSize, 41 FomulaSimplifications, 598 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 286 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 219 NumberOfCodeBlocks, 203 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 212 ConstructedInterpolants, 0 QuantifiedInterpolants, 38960 SizeOfPredicates, 22 NumberOfNonLiveVariables, 412 ConjunctsInSsa, 131 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 332/424 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...