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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:01:14,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:01:14,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:01:15,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:01:15,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:01:15,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:01:15,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:01:15,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:01:15,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:01:15,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:01:15,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:01:15,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:01:15,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:01:15,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:01:15,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:01:15,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:01:15,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:01:15,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:01:15,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:01:15,039 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:01:15,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:01:15,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:01:15,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:01:15,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:01:15,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:01:15,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:01:15,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:01:15,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:01:15,064 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 [2019-10-15 03:01:15,085 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:01:15,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:01:15,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:01:15,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:01:15,088 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:01:15,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:01:15,089 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:01:15,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:01:15,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:01:15,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:01:15,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:01:15,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:01:15,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:01:15,092 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:01:15,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:01:15,092 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:01:15,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:01:15,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:01:15,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:01:15,093 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:01:15,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:01:15,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:01:15,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:01:15,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:01:15,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:01:15,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:01:15,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:01:15,095 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:01:15,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:01:15,385 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:01:15,403 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:01:15,407 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:01:15,409 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:01:15,409 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:01:15,410 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2019-10-15 03:01:15,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/118c7d249/1ebfa3f7ce14465687e4ac4ad6867633/FLAG4051f476f [2019-10-15 03:01:15,940 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:01:15,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2019-10-15 03:01:15,949 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/118c7d249/1ebfa3f7ce14465687e4ac4ad6867633/FLAG4051f476f [2019-10-15 03:01:16,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/118c7d249/1ebfa3f7ce14465687e4ac4ad6867633 [2019-10-15 03:01:16,334 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:01:16,335 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:01:16,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:01:16,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:01:16,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:01:16,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:01:16" (1/1) ... [2019-10-15 03:01:16,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b66671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:16, skipping insertion in model container [2019-10-15 03:01:16,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:01:16" (1/1) ... [2019-10-15 03:01:16,352 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:01:16,371 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:01:16,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:01:16,553 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:01:16,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:01:16,579 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:01:16,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:16 WrapperNode [2019-10-15 03:01:16,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:01:16,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:01:16,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:01:16,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:01:16,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:16" (1/1) ... [2019-10-15 03:01:16,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:16" (1/1) ... [2019-10-15 03:01:16,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:16" (1/1) ... [2019-10-15 03:01:16,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:16" (1/1) ... [2019-10-15 03:01:16,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:16" (1/1) ... [2019-10-15 03:01:16,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:16" (1/1) ... [2019-10-15 03:01:16,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:16" (1/1) ... [2019-10-15 03:01:16,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:01:16,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:01:16,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:01:16,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:01:16,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:16" (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 [2019-10-15 03:01:16,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:01:16,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:01:16,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:01:16,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:01:16,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:01:16,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:01:16,740 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:01:16,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:01:16,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:01:16,924 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:01:16,925 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:01:16,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:01:16 BoogieIcfgContainer [2019-10-15 03:01:16,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:01:16,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:01:16,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:01:16,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:01:16,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:01:16" (1/3) ... [2019-10-15 03:01:16,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0ba925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:01:16, skipping insertion in model container [2019-10-15 03:01:16,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:01:16" (2/3) ... [2019-10-15 03:01:16,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0ba925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:01:16, skipping insertion in model container [2019-10-15 03:01:16,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:01:16" (3/3) ... [2019-10-15 03:01:16,935 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2019-10-15 03:01:16,943 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:01:16,949 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:01:16,960 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:01:16,985 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:01:16,985 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:01:16,986 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:01:16,986 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:01:16,986 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:01:16,986 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:01:16,986 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:01:16,987 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:01:17,005 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-15 03:01:17,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 03:01:17,011 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:17,012 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:17,014 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:17,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:17,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1869232855, now seen corresponding path program 1 times [2019-10-15 03:01:17,027 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:17,027 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013869633] [2019-10-15 03:01:17,028 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:17,028 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:17,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:17,381 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2019-10-15 03:01:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:17,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013869633] [2019-10-15 03:01:17,388 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:01:17,388 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:01:17,388 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576468117] [2019-10-15 03:01:17,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:01:17,394 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:17,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:01:17,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:01:17,414 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-10-15 03:01:17,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:17,467 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-10-15 03:01:17,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:01:17,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-15 03:01:17,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:17,481 INFO L225 Difference]: With dead ends: 29 [2019-10-15 03:01:17,482 INFO L226 Difference]: Without dead ends: 12 [2019-10-15 03:01:17,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:01:17,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-15 03:01:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-15 03:01:17,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-15 03:01:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-15 03:01:17,529 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-15 03:01:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:17,530 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-15 03:01:17,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:01:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-15 03:01:17,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 03:01:17,532 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:17,533 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:17,533 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:17,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:17,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1455464170, now seen corresponding path program 1 times [2019-10-15 03:01:17,535 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:17,535 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862077950] [2019-10-15 03:01:17,536 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:17,536 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:17,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:17,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862077950] [2019-10-15 03:01:17,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670721941] [2019-10-15 03:01:17,660 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 [2019-10-15 03:01:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:17,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 03:01:17,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:17,770 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:17,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1605186967] [2019-10-15 03:01:17,831 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:01:17,832 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:17,838 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:17,847 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:17,847 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:17,908 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:01:18,187 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2019-10-15 03:01:18,210 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:01:18,214 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:18,543 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:18,544 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 6] total 12 [2019-10-15 03:01:18,544 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944092209] [2019-10-15 03:01:18,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-15 03:01:18,547 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:18,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-15 03:01:18,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:01:18,548 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2019-10-15 03:01:18,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:18,711 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-10-15 03:01:18,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 03:01:18,712 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2019-10-15 03:01:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:18,713 INFO L225 Difference]: With dead ends: 20 [2019-10-15 03:01:18,713 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 03:01:18,715 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-15 03:01:18,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 03:01:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 03:01:18,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 03:01:18,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-15 03:01:18,721 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2019-10-15 03:01:18,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:18,721 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-15 03:01:18,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-15 03:01:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-15 03:01:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 03:01:18,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:18,723 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:18,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:18,927 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:18,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:18,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1007933545, now seen corresponding path program 2 times [2019-10-15 03:01:18,928 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:18,928 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469760981] [2019-10-15 03:01:18,928 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:18,929 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:18,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:19,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469760981] [2019-10-15 03:01:19,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686227422] [2019-10-15 03:01:19,100 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 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 [2019-10-15 03:01:19,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:01:19,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:01:19,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 03:01:19,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:01:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:19,183 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:01:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:01:19,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1705748114] [2019-10-15 03:01:19,280 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:01:19,281 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:01:19,281 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:01:19,282 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:01:19,282 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:01:19,295 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:01:19,427 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 57 for LOIs [2019-10-15 03:01:19,443 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:01:19,446 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:01:19,755 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:01:19,756 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 6] total 18 [2019-10-15 03:01:19,756 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391083198] [2019-10-15 03:01:19,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:01:19,758 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:01:19,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:01:19,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:01:19,759 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 18 states. [2019-10-15 03:01:20,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:01:20,159 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2019-10-15 03:01:20,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-15 03:01:20,160 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-10-15 03:01:20,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:01:20,161 INFO L225 Difference]: With dead ends: 22 [2019-10-15 03:01:20,161 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 03:01:20,162 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2019-10-15 03:01:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 03:01:20,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 03:01:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 03:01:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-10-15 03:01:20,167 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2019-10-15 03:01:20,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:01:20,168 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-10-15 03:01:20,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:01:20,168 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-10-15 03:01:20,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 03:01:20,169 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:01:20,169 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:01:20,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:01:20,382 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:01:20,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:01:20,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1779402249, now seen corresponding path program 3 times [2019-10-15 03:01:20,383 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:01:20,384 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405664243] [2019-10-15 03:01:20,384 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:20,384 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:01:20,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:01:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:01:22,618 WARN L838 $PredicateComparison]: unable to prove that (<= (* 268435456 (div (+ (* c_main_~y~0 178956971) 357913939) 268435456)) (+ (* 178956971 c_main_~y~0) 89478484)) is different from false [2019-10-15 03:01:24,641 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 12 [2019-10-15 03:01:26,654 WARN L838 $PredicateComparison]: unable to prove that (<= (* 1073741824 (div (+ (* c_main_~y~0 715827883) 1431655759) 1073741824)) (+ (* 715827883 c_main_~y~0) 357913936)) is different from false [2019-10-15 03:01:27,561 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 18 [2019-10-15 03:01:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2019-10-15 03:01:31,619 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405664243] [2019-10-15 03:01:31,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061433520] [2019-10-15 03:01:31,620 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 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 [2019-10-15 03:01:31,676 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:01:31,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:01:31,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-15 03:01:31,680 INFO L279 TraceCheckSpWp]: Computing forward predicates...