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/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:00:25,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:00:25,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:00:25,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:00:25,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:00:25,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:00:25,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:00:25,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:00:25,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:00:25,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:00:25,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:00:25,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:00:25,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:00:25,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:00:25,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:00:25,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:00:25,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:00:25,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:00:25,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:00:25,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:00:25,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:00:25,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:00:25,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:00:25,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:00:25,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 23:00:25,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:00:25,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:00:25,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:00:25,972 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 [2019-10-13 23:00:26,000 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:00:26,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:00:26,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:00:26,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:00:26,002 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:00:26,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:00:26,002 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:00:26,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:00:26,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:00:26,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:00:26,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:00:26,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:00:26,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:00:26,004 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:00:26,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:00:26,004 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:00:26,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:00:26,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:00:26,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:00:26,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:00:26,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:00:26,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:00:26,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:00:26,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:00:26,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:00:26,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:00:26,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:00:26,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:00:26,007 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 [2019-10-13 23:00:26,318 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:00:26,340 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:00:26,344 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:00:26,346 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:00:26,346 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:00:26,347 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2019-10-13 23:00:26,422 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d6884728/e34114f8ba044ca98b31dc22ea7d46a2/FLAG3361f8fdb [2019-10-13 23:00:26,888 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:00:26,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2019-10-13 23:00:26,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d6884728/e34114f8ba044ca98b31dc22ea7d46a2/FLAG3361f8fdb [2019-10-13 23:00:27,237 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d6884728/e34114f8ba044ca98b31dc22ea7d46a2 [2019-10-13 23:00:27,247 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:00:27,249 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:00:27,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:00:27,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:00:27,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:00:27,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:00:27" (1/1) ... [2019-10-13 23:00:27,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c66bfa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:27, skipping insertion in model container [2019-10-13 23:00:27,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:00:27" (1/1) ... [2019-10-13 23:00:27,272 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:00:27,295 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:00:27,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:00:27,555 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:00:27,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:00:27,687 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:00:27,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:27 WrapperNode [2019-10-13 23:00:27,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:00:27,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:00:27,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:00:27,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:00:27,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:27" (1/1) ... [2019-10-13 23:00:27,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:27" (1/1) ... [2019-10-13 23:00:27,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:27" (1/1) ... [2019-10-13 23:00:27,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:27" (1/1) ... [2019-10-13 23:00:27,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:27" (1/1) ... [2019-10-13 23:00:27,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:27" (1/1) ... [2019-10-13 23:00:27,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:27" (1/1) ... [2019-10-13 23:00:27,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:00:27,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:00:27,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:00:27,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:00:27,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:27" (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 [2019-10-13 23:00:27,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:00:27,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:00:27,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 23:00:27,814 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:00:27,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:00:27,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 23:00:27,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 23:00:27,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-13 23:00:27,815 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:00:27,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:00:27,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 23:00:27,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:00:27,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:00:27,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:00:27,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:00:27,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:00:28,276 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:00:28,277 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-13 23:00:28,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:00:28 BoogieIcfgContainer [2019-10-13 23:00:28,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:00:28,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:00:28,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:00:28,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:00:28,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:00:27" (1/3) ... [2019-10-13 23:00:28,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d067eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:00:28, skipping insertion in model container [2019-10-13 23:00:28,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:27" (2/3) ... [2019-10-13 23:00:28,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d067eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:00:28, skipping insertion in model container [2019-10-13 23:00:28,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:00:28" (3/3) ... [2019-10-13 23:00:28,287 INFO L109 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2019-10-13 23:00:28,297 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:00:28,305 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:00:28,316 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:00:28,342 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:00:28,342 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:00:28,342 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:00:28,342 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:00:28,343 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:00:28,343 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:00:28,343 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:00:28,343 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:00:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-13 23:00:28,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 23:00:28,368 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:28,370 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:28,372 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:28,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:28,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1006628031, now seen corresponding path program 1 times [2019-10-13 23:00:28,388 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:28,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678980704] [2019-10-13 23:00:28,389 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:28,389 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:28,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:28,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678980704] [2019-10-13 23:00:28,555 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:28,558 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 23:00:28,558 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460154252] [2019-10-13 23:00:28,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:00:28,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:28,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:00:28,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:00:28,600 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-10-13 23:00:28,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:28,632 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2019-10-13 23:00:28,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:00:28,636 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-10-13 23:00:28,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:28,643 INFO L225 Difference]: With dead ends: 45 [2019-10-13 23:00:28,643 INFO L226 Difference]: Without dead ends: 20 [2019-10-13 23:00:28,646 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:00:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-13 23:00:28,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-13 23:00:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 23:00:28,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2019-10-13 23:00:28,686 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 15 [2019-10-13 23:00:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:28,687 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2019-10-13 23:00:28,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:00:28,687 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2019-10-13 23:00:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 23:00:28,689 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:28,689 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:28,690 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:28,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:28,691 INFO L82 PathProgramCache]: Analyzing trace with hash 154465315, now seen corresponding path program 1 times [2019-10-13 23:00:28,692 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:28,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809478872] [2019-10-13 23:00:28,693 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:28,693 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:28,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:28,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809478872] [2019-10-13 23:00:28,848 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:28,848 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:00:28,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29705026] [2019-10-13 23:00:28,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:00:28,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:28,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:00:28,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:00:28,851 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 3 states. [2019-10-13 23:00:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:28,944 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2019-10-13 23:00:28,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:00:28,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-13 23:00:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:28,947 INFO L225 Difference]: With dead ends: 41 [2019-10-13 23:00:28,948 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 23:00:28,949 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:00:28,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 23:00:28,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2019-10-13 23:00:28,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 23:00:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2019-10-13 23:00:28,956 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 17 [2019-10-13 23:00:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:28,957 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2019-10-13 23:00:28,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:00:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2019-10-13 23:00:28,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 23:00:28,958 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:28,958 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:28,959 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:28,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:28,959 INFO L82 PathProgramCache]: Analyzing trace with hash -415101532, now seen corresponding path program 1 times [2019-10-13 23:00:28,959 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:28,960 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023171126] [2019-10-13 23:00:28,960 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:28,960 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:28,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:29,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023171126] [2019-10-13 23:00:29,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507921397] [2019-10-13 23:00:29,072 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 [2019-10-13 23:00:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:29,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 23:00:29,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 23:00:29,203 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 23:00:29,310 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:00:29,312 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [4] total 12 [2019-10-13 23:00:29,312 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840916836] [2019-10-13 23:00:29,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 23:00:29,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:29,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 23:00:29,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-10-13 23:00:29,316 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 10 states. [2019-10-13 23:00:29,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:29,408 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2019-10-13 23:00:29,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:00:29,409 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-10-13 23:00:29,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:29,410 INFO L225 Difference]: With dead ends: 35 [2019-10-13 23:00:29,411 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 23:00:29,413 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-13 23:00:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 23:00:29,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-10-13 23:00:29,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 23:00:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2019-10-13 23:00:29,426 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 18 [2019-10-13 23:00:29,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:29,427 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2019-10-13 23:00:29,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 23:00:29,427 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2019-10-13 23:00:29,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 23:00:29,428 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:29,428 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:29,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:29,631 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:29,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:29,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1072112129, now seen corresponding path program 1 times [2019-10-13 23:00:29,632 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:29,632 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003437252] [2019-10-13 23:00:29,632 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:29,632 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:29,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:00:29,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003437252] [2019-10-13 23:00:29,776 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:29,776 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:00:29,777 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208661023] [2019-10-13 23:00:29,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:00:29,778 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:29,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:00:29,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:00:29,779 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 3 states. [2019-10-13 23:00:29,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:29,806 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2019-10-13 23:00:29,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:00:29,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-10-13 23:00:29,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:29,808 INFO L225 Difference]: With dead ends: 52 [2019-10-13 23:00:29,809 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 23:00:29,809 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:00:29,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 23:00:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-10-13 23:00:29,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-13 23:00:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2019-10-13 23:00:29,820 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 21 [2019-10-13 23:00:29,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:29,821 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2019-10-13 23:00:29,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:00:29,821 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2019-10-13 23:00:29,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 23:00:29,822 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:29,824 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:29,824 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:29,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1398520043, now seen corresponding path program 1 times [2019-10-13 23:00:29,825 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:29,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197017260] [2019-10-13 23:00:29,825 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:29,826 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:29,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 23:00:29,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197017260] [2019-10-13 23:00:29,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541203622] [2019-10-13 23:00:29,927 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 [2019-10-13 23:00:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:29,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 23:00:29,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:30,038 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-13 23:00:30,039 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 23:00:30,048 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 23:00:30,049 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 23:00:30,050 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-13 23:00:30,130 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-13 23:00:30,130 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 23:00:30,133 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 23:00:30,134 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 23:00:30,134 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-13 23:00:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 23:00:30,149 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:00:30,273 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:00:30,273 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2019-10-13 23:00:30,274 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216088043] [2019-10-13 23:00:30,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:00:30,274 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:30,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:00:30,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-10-13 23:00:30,275 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 7 states. [2019-10-13 23:00:30,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:30,451 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2019-10-13 23:00:30,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:00:30,452 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-10-13 23:00:30,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:30,453 INFO L225 Difference]: With dead ends: 43 [2019-10-13 23:00:30,453 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 23:00:30,454 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-10-13 23:00:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 23:00:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-13 23:00:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 23:00:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2019-10-13 23:00:30,460 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 22 [2019-10-13 23:00:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:30,460 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2019-10-13 23:00:30,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:00:30,460 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2019-10-13 23:00:30,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 23:00:30,461 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:30,462 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:30,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:30,663 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:30,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:30,663 INFO L82 PathProgramCache]: Analyzing trace with hash -392356454, now seen corresponding path program 1 times [2019-10-13 23:00:30,663 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:30,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906750187] [2019-10-13 23:00:30,664 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:30,664 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:30,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:00:30,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906750187] [2019-10-13 23:00:30,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071294648] [2019-10-13 23:00:30,738 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 [2019-10-13 23:00:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:30,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 23:00:30,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:30,813 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-13 23:00:30,814 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 23:00:30,819 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 23:00:30,820 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 23:00:30,820 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-13 23:00:30,881 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2019-10-13 23:00:30,882 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 23:00:30,884 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 23:00:30,893 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 23:00:30,894 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2019-10-13 23:00:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 23:00:30,912 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 23:00:31,019 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:00:31,019 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2019-10-13 23:00:31,019 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344775653] [2019-10-13 23:00:31,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:00:31,020 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:31,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:00:31,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2019-10-13 23:00:31,021 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 7 states. [2019-10-13 23:00:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:31,208 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2019-10-13 23:00:31,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:00:31,209 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-10-13 23:00:31,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:31,209 INFO L225 Difference]: With dead ends: 42 [2019-10-13 23:00:31,210 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 23:00:31,210 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-10-13 23:00:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 23:00:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-10-13 23:00:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-13 23:00:31,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-10-13 23:00:31,217 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 23 [2019-10-13 23:00:31,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:31,217 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-10-13 23:00:31,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:00:31,218 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-10-13 23:00:31,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 23:00:31,218 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:31,219 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:31,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:31,422 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:31,423 INFO L82 PathProgramCache]: Analyzing trace with hash 996109488, now seen corresponding path program 1 times [2019-10-13 23:00:31,423 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:31,423 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592792780] [2019-10-13 23:00:31,423 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:31,423 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:31,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:00:31,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592792780] [2019-10-13 23:00:31,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140082148] [2019-10-13 23:00:31,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:31,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 23:00:31,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:00:31,595 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:00:31,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [997763796] [2019-10-13 23:00:31,662 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-13 23:00:31,662 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:00:31,676 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:00:31,686 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:00:31,687 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:00:31,799 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 23:00:32,000 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 23:00:32,624 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-13 23:00:32,641 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 23:00:32,647 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 23:00:32,647 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 23:00:32,648 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 455#(and (<= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#input_string~0.offset_BEFORE_CALL_1| Int) (v_main_~i~0_BEFORE_CALL_1 Int) (|v_main_~#input_string~0.base_BEFORE_CALL_1| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 1) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= 0 (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_1|) (+ |v_main_~#input_string~0.offset_BEFORE_CALL_1| (mod v_main_~i~0_BEFORE_CALL_1 4294967296)))) (<= (mod v_main_~i~0_BEFORE_CALL_1 4294967296) 2147483647)) (and (= |__VERIFIER_assert_#in~cond| 0) (not (<= (mod v_main_~i~0_BEFORE_CALL_1 4294967296) 2147483647)) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= 0 (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_1|) (+ |v_main_~#input_string~0.offset_BEFORE_CALL_1| (mod v_main_~i~0_BEFORE_CALL_1 4294967296) (- 4294967296))))) (and (= |__VERIFIER_assert_#in~cond| 1) (not (<= (mod v_main_~i~0_BEFORE_CALL_1 4294967296) 2147483647)) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= 0 (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_1|) (+ |v_main_~#input_string~0.offset_BEFORE_CALL_1| (mod v_main_~i~0_BEFORE_CALL_1 4294967296) (- 4294967296))))) (and (= |__VERIFIER_assert_#in~cond| 0) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= 0 (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_1|) (+ |v_main_~#input_string~0.offset_BEFORE_CALL_1| (mod v_main_~i~0_BEFORE_CALL_1 4294967296)))) (<= (mod v_main_~i~0_BEFORE_CALL_1 4294967296) 2147483647)))) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 23:00:32,648 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 459#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 23:00:32,649 INFO L193 IcfgInterpreter]: Reachable states at location L24-1 satisfy 120#(and (= |main_#t~mem4| (select (select |#memory_int| |main_~#input_string~0.base|) (+ (ite (<= (mod main_~n_caracter~0 4294967296) 2147483647) (mod main_~n_caracter~0 4294967296) (+ (mod main_~n_caracter~0 4294967296) (- 4294967296))) |main_~#input_string~0.offset|))) (<= 0 main_~n_caracter~0)) [2019-10-13 23:00:32,649 INFO L193 IcfgInterpreter]: Reachable states at location L35-1 satisfy 317#(and (<= 0 main_~i~0) (= |main_#t~mem11| (select (select |#memory_int| |main_~#input_string~0.base|) (+ |main_~#input_string~0.offset| (ite (<= (mod main_~i~0 4294967296) 2147483647) (mod main_~i~0 4294967296) (+ (mod main_~i~0 4294967296) (- 4294967296)))))) (<= 0 main_~cont~0) (= main_~cont~0 0) (<= main_~cont~0 0) (<= 0 main_~n_caracter~0) (<= 0 main_~cont_aux~0)) [2019-10-13 23:00:32,649 INFO L193 IcfgInterpreter]: Reachable states at location L37-3 satisfy 436#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 main_~cont~0) (= main_~cont~0 0) (<= main_~cont~0 0) (<= 0 main_~n_caracter~0) (<= 0 main_~cont_aux~0)) [2019-10-13 23:00:32,650 INFO L193 IcfgInterpreter]: Reachable states at location L28-3 satisfy 130#(and (<= 0 main_~i~0) (<= 0 main_~cont~0) (or (and (= 0 (select (select |#memory_int| |main_~#input_string~0.base|) (+ (mod main_~n_caracter~0 4294967296) |main_~#input_string~0.offset|))) (= main_~cont~0 0) (<= (mod main_~n_caracter~0 4294967296) 2147483647) (= main_~i~0 0)) (and (= main_~cont~0 0) (= 0 (select (select |#memory_int| |main_~#input_string~0.base|) (+ (mod main_~n_caracter~0 4294967296) |main_~#input_string~0.offset| (- 4294967296)))) (not (<= (mod main_~n_caracter~0 4294967296) 2147483647)) (= main_~i~0 0))) (<= main_~cont~0 0) (<= main_~i~0 0) (<= 0 main_~n_caracter~0)) [2019-10-13 23:00:32,650 INFO L193 IcfgInterpreter]: Reachable states at location L19-3 satisfy 68#true [2019-10-13 23:00:32,651 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:00:32,651 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:00:32,651 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 464#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:00:32,651 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 23:00:32,652 INFO L193 IcfgInterpreter]: Reachable states at location L6 satisfy 450#(and (<= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#input_string~0.offset_BEFORE_CALL_1| Int) (v_main_~i~0_BEFORE_CALL_1 Int) (|v_main_~#input_string~0.base_BEFORE_CALL_1| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 1) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= 0 (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_1|) (+ |v_main_~#input_string~0.offset_BEFORE_CALL_1| (mod v_main_~i~0_BEFORE_CALL_1 4294967296)))) (<= (mod v_main_~i~0_BEFORE_CALL_1 4294967296) 2147483647)) (and (= |__VERIFIER_assert_#in~cond| 0) (not (<= (mod v_main_~i~0_BEFORE_CALL_1 4294967296) 2147483647)) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= 0 (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_1|) (+ |v_main_~#input_string~0.offset_BEFORE_CALL_1| (mod v_main_~i~0_BEFORE_CALL_1 4294967296) (- 4294967296))))) (and (= |__VERIFIER_assert_#in~cond| 1) (not (<= (mod v_main_~i~0_BEFORE_CALL_1 4294967296) 2147483647)) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= 0 (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_1|) (+ |v_main_~#input_string~0.offset_BEFORE_CALL_1| (mod v_main_~i~0_BEFORE_CALL_1 4294967296) (- 4294967296))))) (and (= |__VERIFIER_assert_#in~cond| 0) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= 0 (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_1|) (+ |v_main_~#input_string~0.offset_BEFORE_CALL_1| (mod v_main_~i~0_BEFORE_CALL_1 4294967296)))) (<= (mod v_main_~i~0_BEFORE_CALL_1 4294967296) 2147483647)))) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 23:00:32,652 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 445#(and (exists ((|v_main_~#input_string~0.offset_BEFORE_CALL_1| Int) (v_main_~i~0_BEFORE_CALL_1 Int) (|v_main_~#input_string~0.base_BEFORE_CALL_1| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 1) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= 0 (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_1|) (+ |v_main_~#input_string~0.offset_BEFORE_CALL_1| (mod v_main_~i~0_BEFORE_CALL_1 4294967296)))) (<= (mod v_main_~i~0_BEFORE_CALL_1 4294967296) 2147483647)) (and (= |__VERIFIER_assert_#in~cond| 0) (not (<= (mod v_main_~i~0_BEFORE_CALL_1 4294967296) 2147483647)) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= 0 (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_1|) (+ |v_main_~#input_string~0.offset_BEFORE_CALL_1| (mod v_main_~i~0_BEFORE_CALL_1 4294967296) (- 4294967296))))) (and (= |__VERIFIER_assert_#in~cond| 1) (not (<= (mod v_main_~i~0_BEFORE_CALL_1 4294967296) 2147483647)) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= 0 (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_1|) (+ |v_main_~#input_string~0.offset_BEFORE_CALL_1| (mod v_main_~i~0_BEFORE_CALL_1 4294967296) (- 4294967296))))) (and (= |__VERIFIER_assert_#in~cond| 0) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= 0 (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_1|) (+ |v_main_~#input_string~0.offset_BEFORE_CALL_1| (mod v_main_~i~0_BEFORE_CALL_1 4294967296)))) (<= (mod v_main_~i~0_BEFORE_CALL_1 4294967296) 2147483647)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 23:00:32,653 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 440#(exists ((|v_main_~#input_string~0.offset_BEFORE_CALL_1| Int) (v_main_~i~0_BEFORE_CALL_1 Int) (|v_main_~#input_string~0.base_BEFORE_CALL_1| Int)) (or (and (= |__VERIFIER_assert_#in~cond| 1) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= 0 (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_1|) (+ |v_main_~#input_string~0.offset_BEFORE_CALL_1| (mod v_main_~i~0_BEFORE_CALL_1 4294967296)))) (<= (mod v_main_~i~0_BEFORE_CALL_1 4294967296) 2147483647)) (and (= |__VERIFIER_assert_#in~cond| 0) (not (<= (mod v_main_~i~0_BEFORE_CALL_1 4294967296) 2147483647)) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= 0 (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_1|) (+ |v_main_~#input_string~0.offset_BEFORE_CALL_1| (mod v_main_~i~0_BEFORE_CALL_1 4294967296) (- 4294967296))))) (and (= |__VERIFIER_assert_#in~cond| 1) (not (<= (mod v_main_~i~0_BEFORE_CALL_1 4294967296) 2147483647)) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= 0 (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_1|) (+ |v_main_~#input_string~0.offset_BEFORE_CALL_1| (mod v_main_~i~0_BEFORE_CALL_1 4294967296) (- 4294967296))))) (and (= |__VERIFIER_assert_#in~cond| 0) (<= 0 v_main_~i~0_BEFORE_CALL_1) (= 0 (select (select |#memory_int| |v_main_~#input_string~0.base_BEFORE_CALL_1|) (+ |v_main_~#input_string~0.offset_BEFORE_CALL_1| (mod v_main_~i~0_BEFORE_CALL_1 4294967296)))) (<= (mod v_main_~i~0_BEFORE_CALL_1 4294967296) 2147483647)))) [2019-10-13 23:00:32,653 INFO L193 IcfgInterpreter]: Reachable states at location L24-4 satisfy 125#(and (or (and (= 0 (select (select |#memory_int| |main_~#input_string~0.base|) (+ (mod main_~n_caracter~0 4294967296) |main_~#input_string~0.offset| (- 4294967296)))) (not (<= (mod main_~n_caracter~0 4294967296) 2147483647))) (and (= 0 (select (select |#memory_int| |main_~#input_string~0.base|) (+ (mod main_~n_caracter~0 4294967296) |main_~#input_string~0.offset|))) (<= (mod main_~n_caracter~0 4294967296) 2147483647))) (<= 0 main_~n_caracter~0)) [2019-10-13 23:00:32,653 INFO L193 IcfgInterpreter]: Reachable states at location L35-4 satisfy 322#(and (or (and (<= 0 main_~i~0) (= main_~cont~0 0) (= 0 (select (select |#memory_int| |main_~#input_string~0.base|) (+ (mod main_~i~0 4294967296) |main_~#input_string~0.offset|))) (<= (mod main_~i~0 4294967296) 2147483647)) (and (not (<= (mod main_~i~0 4294967296) 2147483647)) (<= 0 main_~i~0) (= main_~cont~0 0) (= 0 (select (select |#memory_int| |main_~#input_string~0.base|) (+ (mod main_~i~0 4294967296) |main_~#input_string~0.offset| (- 4294967296)))))) (<= 0 main_~cont~0) (<= main_~cont~0 0) (<= 0 main_~n_caracter~0) (<= 0 main_~cont_aux~0)) [2019-10-13 23:00:32,654 INFO L193 IcfgInterpreter]: Reachable states at location L24-3 satisfy 115#(<= 0 main_~n_caracter~0) [2019-10-13 23:00:32,655 INFO L193 IcfgInterpreter]: Reachable states at location L21 satisfy 73#(and (not (< (mod main_~i~0 4294967296) 5)) (= (select (select |#memory_int| |main_~#input_string~0.base|) (+ |main_~#input_string~0.offset| 4)) |main_#t~mem3|)) [2019-10-13 23:00:32,656 INFO L193 IcfgInterpreter]: Reachable states at location L35-3 satisfy 312#(and (<= 0 main_~i~0) (<= 0 main_~cont~0) (= main_~cont~0 0) (<= main_~cont~0 0) (<= 0 main_~n_caracter~0) (<= 0 main_~cont_aux~0)) [2019-10-13 23:00:33,455 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 23:00:33,456 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 17] total 24 [2019-10-13 23:00:33,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496309041] [2019-10-13 23:00:33,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 23:00:33,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:33,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 23:00:33,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2019-10-13 23:00:33,462 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 24 states. [2019-10-13 23:00:34,528 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2019-10-13 23:00:34,901 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2019-10-13 23:00:35,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:35,790 INFO L93 Difference]: Finished difference Result 98 states and 136 transitions. [2019-10-13 23:00:35,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-13 23:00:35,791 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2019-10-13 23:00:35,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:35,792 INFO L225 Difference]: With dead ends: 98 [2019-10-13 23:00:35,792 INFO L226 Difference]: Without dead ends: 73 [2019-10-13 23:00:35,794 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=338, Invalid=2112, Unknown=0, NotChecked=0, Total=2450 [2019-10-13 23:00:35,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-13 23:00:35,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 32. [2019-10-13 23:00:35,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-13 23:00:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-10-13 23:00:35,803 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 24 [2019-10-13 23:00:35,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:35,803 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-10-13 23:00:35,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 23:00:35,803 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-10-13 23:00:35,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 23:00:35,804 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:35,804 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:36,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:36,010 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:36,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:36,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1447556309, now seen corresponding path program 1 times [2019-10-13 23:00:36,011 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:36,011 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102293739] [2019-10-13 23:00:36,011 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:36,012 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:36,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:00:36,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102293739] [2019-10-13 23:00:36,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535475676] [2019-10-13 23:00:36,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:36,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 23:00:36,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:00:36,195 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 23:00:36,212 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:00:36,212 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 7 [2019-10-13 23:00:36,212 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50323179] [2019-10-13 23:00:36,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:00:36,213 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:36,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:00:36,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:00:36,214 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 3 states. [2019-10-13 23:00:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:36,244 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2019-10-13 23:00:36,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:00:36,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-10-13 23:00:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:36,246 INFO L225 Difference]: With dead ends: 47 [2019-10-13 23:00:36,246 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 23:00:36,247 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:00:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 23:00:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-13 23:00:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 23:00:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-13 23:00:36,253 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 27 [2019-10-13 23:00:36,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:36,253 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-13 23:00:36,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:00:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-13 23:00:36,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 23:00:36,255 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:36,255 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:36,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:36,455 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:36,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:36,456 INFO L82 PathProgramCache]: Analyzing trace with hash -559822302, now seen corresponding path program 1 times [2019-10-13 23:00:36,456 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:36,457 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070196197] [2019-10-13 23:00:36,457 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:36,457 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:36,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 23:00:36,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070196197] [2019-10-13 23:00:36,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890475277] [2019-10-13 23:00:36,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:36,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-13 23:00:36,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 23:00:36,847 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:37,086 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2019-10-13 23:00:37,311 WARN L225 Elim1Store]: Array PQE input equivalent to true [2019-10-13 23:00:37,509 WARN L225 Elim1Store]: Array PQE input equivalent to true [2019-10-13 23:00:37,801 WARN L191 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2019-10-13 23:00:38,289 WARN L191 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2019-10-13 23:00:38,654 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58