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/loop-acceleration/phases_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:14:13,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:14:13,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:14:13,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:14:13,142 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:14:13,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:14:13,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:14:13,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:14:13,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:14:13,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:14:13,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:14:13,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:14:13,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:14:13,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:14:13,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:14:13,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:14:13,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:14:13,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:14:13,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:14:13,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:14:13,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:14:13,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:14:13,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:14:13,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:14:13,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:14:13,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:14:13,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:14:13,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:14:13,174 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:14:13,175 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:14:13,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:14:13,179 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:14:13,180 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:14:13,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:14:13,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:14:13,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:14:13,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:14:13,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:14:13,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:14:13,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:14:13,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:14:13,191 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 23:14:13,211 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:14:13,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:14:13,212 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:14:13,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:14:13,212 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:14:13,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:14:13,213 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:14:13,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:14:13,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:14:13,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:14:13,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:14:13,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:14:13,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:14:13,214 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:14:13,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:14:13,215 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:14:13,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:14:13,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:14:13,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:14:13,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:14:13,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:14:13,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:14:13,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:14:13,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:14:13,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:14:13,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:14:13,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:14:13,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:14:13,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:14:13,529 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:14:13,541 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:14:13,544 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:14:13,546 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:14:13,546 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:14:13,547 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2019-10-14 23:14:13,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/806bfa7e9/501341d265f248e78ae2f8e050fceced/FLAG1fa13a595 [2019-10-14 23:14:14,069 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:14:14,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2019-10-14 23:14:14,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/806bfa7e9/501341d265f248e78ae2f8e050fceced/FLAG1fa13a595 [2019-10-14 23:14:14,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/806bfa7e9/501341d265f248e78ae2f8e050fceced [2019-10-14 23:14:14,493 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:14:14,495 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:14:14,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:14:14,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:14:14,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:14:14,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:14:14" (1/1) ... [2019-10-14 23:14:14,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c9ac29d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:14, skipping insertion in model container [2019-10-14 23:14:14,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:14:14" (1/1) ... [2019-10-14 23:14:14,512 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:14:14,532 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:14:14,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:14:14,747 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:14:14,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:14:14,775 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:14:14,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:14 WrapperNode [2019-10-14 23:14:14,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:14:14,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:14:14,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:14:14,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:14:14,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:14" (1/1) ... [2019-10-14 23:14:14,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:14" (1/1) ... [2019-10-14 23:14:14,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:14" (1/1) ... [2019-10-14 23:14:14,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:14" (1/1) ... [2019-10-14 23:14:14,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:14" (1/1) ... [2019-10-14 23:14:14,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:14" (1/1) ... [2019-10-14 23:14:14,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:14" (1/1) ... [2019-10-14 23:14:14,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:14:14,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:14:14,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:14:14,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:14:14,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:14" (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 23:14:14,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:14:14,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:14:14,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:14:14,972 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:14:14,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:14:14,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:14:14,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-14 23:14:14,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:14:14,973 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:14:14,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:14:14,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:14:15,155 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:14:15,156 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:14:15,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:14:15 BoogieIcfgContainer [2019-10-14 23:14:15,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:14:15,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:14:15,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:14:15,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:14:15,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:14:14" (1/3) ... [2019-10-14 23:14:15,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18dfabeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:14:15, skipping insertion in model container [2019-10-14 23:14:15,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:14" (2/3) ... [2019-10-14 23:14:15,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18dfabeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:14:15, skipping insertion in model container [2019-10-14 23:14:15,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:14:15" (3/3) ... [2019-10-14 23:14:15,180 INFO L109 eAbstractionObserver]: Analyzing ICFG phases_2-2.c [2019-10-14 23:14:15,208 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:14:15,225 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:14:15,254 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:14:15,283 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:14:15,283 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:14:15,286 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:14:15,286 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:14:15,287 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:14:15,287 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:14:15,287 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:14:15,287 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:14:15,319 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-14 23:14:15,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-14 23:14:15,325 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:15,326 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:15,328 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:15,337 INFO L82 PathProgramCache]: Analyzing trace with hash -133618162, now seen corresponding path program 1 times [2019-10-14 23:14:15,347 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:15,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387324462] [2019-10-14 23:14:15,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:15,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:15,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:15,446 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 23:14:15,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387324462] [2019-10-14 23:14:15,448 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:14:15,448 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:14:15,449 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256763123] [2019-10-14 23:14:15,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:14:15,454 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:15,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:14:15,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:14:15,472 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-10-14 23:14:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:15,503 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-10-14 23:14:15,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:14:15,504 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-10-14 23:14:15,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:15,514 INFO L225 Difference]: With dead ends: 30 [2019-10-14 23:14:15,514 INFO L226 Difference]: Without dead ends: 13 [2019-10-14 23:14:15,520 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 23:14:15,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-14 23:14:15,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-14 23:14:15,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-14 23:14:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-10-14 23:14:15,556 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2019-10-14 23:14:15,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:15,557 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-10-14 23:14:15,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:14:15,557 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-10-14 23:14:15,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-14 23:14:15,558 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:15,558 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:15,559 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:15,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:15,559 INFO L82 PathProgramCache]: Analyzing trace with hash -142853372, now seen corresponding path program 1 times [2019-10-14 23:14:15,560 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:15,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276149635] [2019-10-14 23:14:15,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:15,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:15,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:15,875 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 23:14:15,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276149635] [2019-10-14 23:14:15,876 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:14:15,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:14:15,877 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114891578] [2019-10-14 23:14:15,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:14:15,879 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:15,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:14:15,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:14:15,880 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2019-10-14 23:14:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:17,978 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-10-14 23:14:17,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:14:17,979 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-10-14 23:14:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:17,981 INFO L225 Difference]: With dead ends: 20 [2019-10-14 23:14:17,981 INFO L226 Difference]: Without dead ends: 15 [2019-10-14 23:14:17,982 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:14:17,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-14 23:14:17,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-10-14 23:14:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-14 23:14:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-10-14 23:14:17,987 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2019-10-14 23:14:17,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:17,988 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-10-14 23:14:17,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:14:17,988 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-10-14 23:14:17,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 23:14:17,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:17,989 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:17,989 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:17,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:17,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1232195137, now seen corresponding path program 1 times [2019-10-14 23:14:17,990 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:17,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353305510] [2019-10-14 23:14:17,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:17,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:17,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:18,006 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:14:18,006 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711987995] [2019-10-14 23:14:18,007 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 23:14:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:18,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:14:18,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:18,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353305510] [2019-10-14 23:14:18,094 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:14:18,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711987995] [2019-10-14 23:14:18,095 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:14:18,095 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:14:18,095 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655623749] [2019-10-14 23:14:18,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:14:18,096 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:18,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:14:18,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:14:18,097 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2019-10-14 23:14:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:20,145 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-10-14 23:14:20,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:14:20,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-14 23:14:20,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:20,149 INFO L225 Difference]: With dead ends: 21 [2019-10-14 23:14:20,149 INFO L226 Difference]: Without dead ends: 16 [2019-10-14 23:14:20,149 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:14:20,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-14 23:14:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-10-14 23:14:20,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-14 23:14:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-10-14 23:14:20,154 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 13 [2019-10-14 23:14:20,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:20,154 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-10-14 23:14:20,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:14:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-10-14 23:14:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 23:14:20,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:20,155 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:20,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:20,357 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:20,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1289453439, now seen corresponding path program 1 times [2019-10-14 23:14:20,358 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:20,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846465826] [2019-10-14 23:14:20,359 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:20,359 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:20,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:20,364 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:14:20,365 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960255832] [2019-10-14 23:14:20,365 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 23:14:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:20,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:14:20,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:20,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:14:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:20,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846465826] [2019-10-14 23:14:20,513 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:14:20,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960255832] [2019-10-14 23:14:20,513 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:14:20,513 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:14:20,514 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603400884] [2019-10-14 23:14:20,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:14:20,515 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:20,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:14:20,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:14:20,516 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 8 states. [2019-10-14 23:14:22,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:22,633 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2019-10-14 23:14:22,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:14:22,634 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-10-14 23:14:22,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:22,635 INFO L225 Difference]: With dead ends: 23 [2019-10-14 23:14:22,635 INFO L226 Difference]: Without dead ends: 18 [2019-10-14 23:14:22,636 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:14:22,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-14 23:14:22,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2019-10-14 23:14:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-14 23:14:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-14 23:14:22,641 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2019-10-14 23:14:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:22,641 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-14 23:14:22,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:14:22,642 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-14 23:14:22,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 23:14:22,643 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:22,643 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:22,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:22,844 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1005461508, now seen corresponding path program 1 times [2019-10-14 23:14:22,846 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:22,846 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407094818] [2019-10-14 23:14:22,846 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:22,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:22,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:22,854 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:14:22,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800037436] [2019-10-14 23:14:22,854 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:22,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:14:22,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:22,985 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407094818] [2019-10-14 23:14:22,985 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:14:22,985 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800037436] [2019-10-14 23:14:22,985 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:14:22,985 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-14 23:14:22,985 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137813327] [2019-10-14 23:14:22,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:14:22,986 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:22,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:14:22,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:14:22,987 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2019-10-14 23:14:23,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:23,006 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2019-10-14 23:14:23,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:14:23,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 23:14:23,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:23,008 INFO L225 Difference]: With dead ends: 16 [2019-10-14 23:14:23,008 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:14:23,008 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:14:23,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:14:23,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:14:23,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:14:23,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:14:23,009 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2019-10-14 23:14:23,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:23,010 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:14:23,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:14:23,010 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:14:23,010 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:14:23,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:23,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:14:23,349 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-14 23:14:23,349 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:14:23,349 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:14:23,350 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:14:23,350 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:14:23,350 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:14:23,350 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 12 27) the Hoare annotation is: true [2019-10-14 23:14:23,350 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 12 27) no Hoare annotation was computed. [2019-10-14 23:14:23,350 INFO L443 ceAbstractionStarter]: For program point L19(lines 19 23) no Hoare annotation was computed. [2019-10-14 23:14:23,351 INFO L439 ceAbstractionStarter]: At program point L19-2(lines 18 24) the Hoare annotation is: (and (= main_~x~0 1) (<= (+ (* 4294967296 (div main_~y~0 4294967296)) main_~x~0) (+ main_~y~0 (* 4294967296 (div main_~x~0 4294967296))))) [2019-10-14 23:14:23,351 INFO L443 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2019-10-14 23:14:23,351 INFO L439 ceAbstractionStarter]: At program point L18-2(lines 18 24) the Hoare annotation is: (let ((.cse2 (div main_~x~0 4294967296))) (let ((.cse1 (+ main_~y~0 (* 4294967296 .cse2))) (.cse0 (* 4294967296 (div main_~y~0 4294967296)))) (and (<= (+ .cse0 main_~x~0) .cse1) (< .cse1 (+ .cse0 main_~x~0 1)) (< 0 (+ .cse2 1))))) [2019-10-14 23:14:23,351 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 12 27) no Hoare annotation was computed. [2019-10-14 23:14:23,351 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2019-10-14 23:14:23,352 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2019-10-14 23:14:23,352 INFO L443 ceAbstractionStarter]: For program point L7(line 7) no Hoare annotation was computed. [2019-10-14 23:14:23,352 INFO L443 ceAbstractionStarter]: For program point L6(lines 6 8) no Hoare annotation was computed. [2019-10-14 23:14:23,352 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2019-10-14 23:14:23,352 INFO L443 ceAbstractionStarter]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2019-10-14 23:14:23,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:14:23 BoogieIcfgContainer [2019-10-14 23:14:23,368 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:14:23,371 INFO L168 Benchmark]: Toolchain (without parser) took 8874.89 ms. Allocated memory was 137.9 MB in the beginning and 234.9 MB in the end (delta: 97.0 MB). Free memory was 102.3 MB in the beginning and 181.7 MB in the end (delta: -79.4 MB). Peak memory consumption was 17.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:14:23,372 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-14 23:14:23,373 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.93 ms. Allocated memory is still 137.9 MB. Free memory was 102.1 MB in the beginning and 92.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-10-14 23:14:23,374 INFO L168 Benchmark]: Boogie Preprocessor took 132.99 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 92.7 MB in the beginning and 181.2 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2019-10-14 23:14:23,375 INFO L168 Benchmark]: RCFGBuilder took 250.01 ms. Allocated memory is still 202.9 MB. Free memory was 181.2 MB in the beginning and 169.6 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:14:23,376 INFO L168 Benchmark]: TraceAbstraction took 8207.18 ms. Allocated memory was 202.9 MB in the beginning and 234.9 MB in the end (delta: 32.0 MB). Free memory was 169.6 MB in the beginning and 181.7 MB in the end (delta: -12.1 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2019-10-14 23:14:23,380 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.93 ms. Allocated memory is still 137.9 MB. Free memory was 102.1 MB in the beginning and 92.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.99 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 92.7 MB in the beginning and 181.2 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 250.01 ms. Allocated memory is still 202.9 MB. Free memory was 181.2 MB in the beginning and 169.6 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8207.18 ms. Allocated memory was 202.9 MB in the beginning and 234.9 MB in the end (delta: 32.0 MB). Free memory was 169.6 MB in the beginning and 181.7 MB in the end (delta: -12.1 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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: 18]: Loop Invariant Derived loop invariant: x == 1 && 4294967296 * (y / 4294967296) + x <= y + 4294967296 * (x / 4294967296) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Result: SAFE, OverallTime: 8.0s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 55 SDtfs, 11 SDslu, 74 SDs, 0 SdLazy, 95 SolverSat, 4 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 6.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 15 NumberOfFragments, 63 HoareAnnotationTreeSize, 11 FomulaSimplifications, 58 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 70 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 2844 SizeOfPredicates, 4 NumberOfNonLiveVariables, 91 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 4/6 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...