java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:45:20,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:45:20,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:45:20,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:45:20,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:45:20,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:45:20,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:45:20,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:45:20,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:45:20,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:45:20,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:45:20,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:45:20,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:45:20,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:45:20,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:45:20,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:45:20,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:45:20,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:45:20,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:45:20,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:45:20,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:45:20,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:45:20,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:45:20,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:45:20,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:45:20,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:45:20,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:45:20,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:45:20,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:45:20,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:45:20,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:45:20,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:45:20,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:45:20,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:45:20,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:45:20,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:45:20,161 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:45:20,175 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:45:20,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:45:20,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:45:20,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:45:20,177 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:45:20,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:45:20,178 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:45:20,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:45:20,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:45:20,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:45:20,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:45:20,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:45:20,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:45:20,179 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:45:20,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:45:20,180 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:45:20,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:45:20,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:45:20,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:45:20,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:45:20,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:45:20,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:20,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:45:20,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:45:20,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:45:20,182 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:45:20,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:45:20,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:45:20,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:45:20,480 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:45:20,497 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:45:20,502 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:45:20,503 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:45:20,504 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:45:20,505 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init9_ground-1.i [2019-10-14 21:45:20,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7101bbd38/0910665cdfb048c9a57a423cb6804ac4/FLAG8ff185839 [2019-10-14 21:45:21,069 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:45:21,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init9_ground-1.i [2019-10-14 21:45:21,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7101bbd38/0910665cdfb048c9a57a423cb6804ac4/FLAG8ff185839 [2019-10-14 21:45:21,446 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7101bbd38/0910665cdfb048c9a57a423cb6804ac4 [2019-10-14 21:45:21,455 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:45:21,458 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:45:21,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:21,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:45:21,464 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:45:21,465 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:21" (1/1) ... [2019-10-14 21:45:21,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac9f523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:21, skipping insertion in model container [2019-10-14 21:45:21,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:21" (1/1) ... [2019-10-14 21:45:21,478 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:45:21,500 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:45:21,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:21,697 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:45:21,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:21,740 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:45:21,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:21 WrapperNode [2019-10-14 21:45:21,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:21,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:45:21,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:45:21,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:45:21,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:21" (1/1) ... [2019-10-14 21:45:21,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:21" (1/1) ... [2019-10-14 21:45:21,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:21" (1/1) ... [2019-10-14 21:45:21,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:21" (1/1) ... [2019-10-14 21:45:21,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:21" (1/1) ... [2019-10-14 21:45:21,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:21" (1/1) ... [2019-10-14 21:45:21,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:21" (1/1) ... [2019-10-14 21:45:21,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:45:21,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:45:21,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:45:21,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:45:21,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:21,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:45:21,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:45:21,932 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:45:21,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:45:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:45:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:45:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:45:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:45:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:45:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:45:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:45:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:45:21,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:45:22,259 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:45:22,260 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-14 21:45:22,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:22 BoogieIcfgContainer [2019-10-14 21:45:22,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:45:22,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:45:22,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:45:22,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:45:22,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:45:21" (1/3) ... [2019-10-14 21:45:22,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263585bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:22, skipping insertion in model container [2019-10-14 21:45:22,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:21" (2/3) ... [2019-10-14 21:45:22,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263585bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:22, skipping insertion in model container [2019-10-14 21:45:22,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:22" (3/3) ... [2019-10-14 21:45:22,276 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-1.i [2019-10-14 21:45:22,283 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:45:22,291 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:45:22,302 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:45:22,325 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:45:22,326 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:45:22,326 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:45:22,326 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:45:22,326 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:45:22,326 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:45:22,326 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:45:22,327 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:45:22,344 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-10-14 21:45:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:45:22,351 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:22,351 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:22,353 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:22,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:22,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1872712154, now seen corresponding path program 1 times [2019-10-14 21:45:22,364 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:22,365 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465053146] [2019-10-14 21:45:22,365 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:22,365 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:22,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:22,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465053146] [2019-10-14 21:45:22,535 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:22,535 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:45:22,536 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606993933] [2019-10-14 21:45:22,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:45:22,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:22,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:45:22,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:22,557 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2019-10-14 21:45:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:22,737 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2019-10-14 21:45:22,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:45:22,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-10-14 21:45:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:22,747 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:45:22,747 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:45:22,751 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:22,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:45:22,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-14 21:45:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:45:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2019-10-14 21:45:22,800 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 29 [2019-10-14 21:45:22,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:22,801 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2019-10-14 21:45:22,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:45:22,801 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2019-10-14 21:45:22,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:45:22,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:22,803 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:22,803 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:22,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1932733742, now seen corresponding path program 1 times [2019-10-14 21:45:22,804 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:22,804 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932231526] [2019-10-14 21:45:22,805 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:22,805 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:22,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:22,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932231526] [2019-10-14 21:45:22,881 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:22,881 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:45:22,881 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790808581] [2019-10-14 21:45:22,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:45:22,883 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:22,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:45:22,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:22,884 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 4 states. [2019-10-14 21:45:23,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:23,094 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2019-10-14 21:45:23,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:45:23,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-10-14 21:45:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:23,096 INFO L225 Difference]: With dead ends: 70 [2019-10-14 21:45:23,097 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:45:23,099 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:23,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:45:23,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-14 21:45:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 21:45:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-10-14 21:45:23,119 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2019-10-14 21:45:23,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:23,119 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-10-14 21:45:23,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:45:23,120 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-10-14 21:45:23,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:45:23,121 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:23,121 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:23,123 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:23,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:23,124 INFO L82 PathProgramCache]: Analyzing trace with hash 97911482, now seen corresponding path program 1 times [2019-10-14 21:45:23,125 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:23,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782070010] [2019-10-14 21:45:23,125 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,125 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:45:23,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782070010] [2019-10-14 21:45:23,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137751091] [2019-10-14 21:45:23,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:45:23,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:45:23,352 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:23,352 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:45:23,352 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838091616] [2019-10-14 21:45:23,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:45:23,356 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:23,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:45:23,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:23,362 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 6 states. [2019-10-14 21:45:23,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:23,549 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2019-10-14 21:45:23,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:45:23,549 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2019-10-14 21:45:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:23,550 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:45:23,551 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:45:23,551 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:23,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:45:23,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-14 21:45:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:45:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-10-14 21:45:23,562 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 38 [2019-10-14 21:45:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:23,562 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-10-14 21:45:23,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:45:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-10-14 21:45:23,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:45:23,564 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:23,564 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:23,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:23,768 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:23,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:23,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1965553710, now seen corresponding path program 2 times [2019-10-14 21:45:23,770 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:23,770 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817004327] [2019-10-14 21:45:23,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:45:23,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817004327] [2019-10-14 21:45:23,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701831423] [2019-10-14 21:45:23,892 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:23,951 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:23,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:23,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:45:23,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:45:23,976 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:23,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:45:23,976 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754675816] [2019-10-14 21:45:23,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:45:23,979 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:23,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:45:23,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:23,980 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 7 states. [2019-10-14 21:45:24,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:24,207 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2019-10-14 21:45:24,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:45:24,207 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-10-14 21:45:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:24,209 INFO L225 Difference]: With dead ends: 104 [2019-10-14 21:45:24,209 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 21:45:24,212 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 21:45:24,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-10-14 21:45:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:45:24,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2019-10-14 21:45:24,232 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 47 [2019-10-14 21:45:24,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:24,234 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2019-10-14 21:45:24,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:45:24,234 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2019-10-14 21:45:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:45:24,236 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:24,236 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:24,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:24,437 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:24,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:24,438 INFO L82 PathProgramCache]: Analyzing trace with hash 369658042, now seen corresponding path program 3 times [2019-10-14 21:45:24,438 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:24,438 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790985699] [2019-10-14 21:45:24,439 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:24,439 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:24,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-14 21:45:24,611 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790985699] [2019-10-14 21:45:24,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768684711] [2019-10-14 21:45:24,612 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:24,757 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:45:24,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:24,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:45:24,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-14 21:45:24,785 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:24,786 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:45:24,786 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159096487] [2019-10-14 21:45:24,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:45:24,787 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:24,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:45:24,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:24,788 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 8 states. [2019-10-14 21:45:24,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:24,976 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2019-10-14 21:45:24,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:45:24,977 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2019-10-14 21:45:24,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:24,980 INFO L225 Difference]: With dead ends: 121 [2019-10-14 21:45:24,980 INFO L226 Difference]: Without dead ends: 70 [2019-10-14 21:45:24,981 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:24,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-14 21:45:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-10-14 21:45:24,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 21:45:24,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2019-10-14 21:45:24,998 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 56 [2019-10-14 21:45:24,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:24,998 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2019-10-14 21:45:24,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:45:25,001 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2019-10-14 21:45:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:45:25,008 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:25,009 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:25,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:25,214 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:25,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:25,214 INFO L82 PathProgramCache]: Analyzing trace with hash 24657106, now seen corresponding path program 4 times [2019-10-14 21:45:25,215 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:25,215 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297667445] [2019-10-14 21:45:25,215 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:25,215 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:25,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 21:45:25,370 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297667445] [2019-10-14 21:45:25,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840540337] [2019-10-14 21:45:25,371 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:25,441 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:25,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:25,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:45:25,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 21:45:25,494 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:25,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:45:25,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094457122] [2019-10-14 21:45:25,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:45:25,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:25,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:45:25,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:25,497 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 9 states. [2019-10-14 21:45:25,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:25,686 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2019-10-14 21:45:25,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:45:25,687 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2019-10-14 21:45:25,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:25,688 INFO L225 Difference]: With dead ends: 138 [2019-10-14 21:45:25,688 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 21:45:25,689 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:25,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 21:45:25,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-10-14 21:45:25,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 21:45:25,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2019-10-14 21:45:25,709 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 65 [2019-10-14 21:45:25,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:25,709 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2019-10-14 21:45:25,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:45:25,710 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2019-10-14 21:45:25,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 21:45:25,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:25,711 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:25,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:25,916 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:25,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:25,916 INFO L82 PathProgramCache]: Analyzing trace with hash -217477446, now seen corresponding path program 5 times [2019-10-14 21:45:25,917 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:25,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701607128] [2019-10-14 21:45:25,917 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:25,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:25,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-10-14 21:45:26,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701607128] [2019-10-14 21:45:26,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890966660] [2019-10-14 21:45:26,042 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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