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/eca-rers2012/Problem12_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:00:16,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:00:16,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:00:16,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:00:16,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:00:16,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:00:16,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:00:16,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:00:16,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:00:16,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:00:16,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:00:16,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:00:16,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:00:16,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:00:16,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:00:16,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:00:16,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:00:16,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:00:16,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:00:16,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:00:16,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:00:16,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:00:16,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:00:16,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:00:16,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:00:16,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:00:16,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:00:16,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:00:16,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:00:16,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:00:16,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:00:16,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:00:16,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:00:16,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:00:16,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:00:16,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:00:16,246 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 22:00:16,262 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:00:16,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:00:16,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:00:16,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:00:16,264 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:00:16,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:00:16,264 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:00:16,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:00:16,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:00:16,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:00:16,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:00:16,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:00:16,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:00:16,265 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:00:16,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:00:16,266 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:00:16,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:00:16,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:00:16,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:00:16,267 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:00:16,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:00:16,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:00:16,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:00:16,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:00:16,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:00:16,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:00:16,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:00:16,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:00:16,268 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:00:16,572 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:00:16,596 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:00:16,599 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:00:16,600 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:00:16,601 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:00:16,601 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label20.c [2019-10-14 22:00:16,675 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8092be035/d3690bcadba345f8aecb1fe01c0e9071/FLAG24f857ab2 [2019-10-14 22:00:17,397 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:00:17,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label20.c [2019-10-14 22:00:17,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8092be035/d3690bcadba345f8aecb1fe01c0e9071/FLAG24f857ab2 [2019-10-14 22:00:17,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8092be035/d3690bcadba345f8aecb1fe01c0e9071 [2019-10-14 22:00:17,514 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:00:17,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:00:17,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:00:17,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:00:17,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:00:17,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:00:17" (1/1) ... [2019-10-14 22:00:17,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ce2b1cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:17, skipping insertion in model container [2019-10-14 22:00:17,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:00:17" (1/1) ... [2019-10-14 22:00:17,538 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:00:17,700 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:00:19,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:00:19,506 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:00:20,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:00:20,320 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:00:20,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:20 WrapperNode [2019-10-14 22:00:20,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:00:20,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:00:20,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:00:20,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:00:20,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:20" (1/1) ... [2019-10-14 22:00:20,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:20" (1/1) ... [2019-10-14 22:00:20,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:20" (1/1) ... [2019-10-14 22:00:20,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:20" (1/1) ... [2019-10-14 22:00:20,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:20" (1/1) ... [2019-10-14 22:00:20,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:20" (1/1) ... [2019-10-14 22:00:20,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:20" (1/1) ... [2019-10-14 22:00:20,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:00:20,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:00:20,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:00:20,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:00:20,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:20" (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 22:00:20,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:00:20,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:00:20,648 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:00:20,648 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:00:20,648 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-14 22:00:20,648 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-14 22:00:20,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:00:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:00:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:00:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-14 22:00:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-14 22:00:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:00:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:00:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:00:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:00:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:00:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:00:25,671 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:00:25,672 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:00:25,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:00:25 BoogieIcfgContainer [2019-10-14 22:00:25,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:00:25,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:00:25,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:00:25,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:00:25,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:00:17" (1/3) ... [2019-10-14 22:00:25,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30053e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:00:25, skipping insertion in model container [2019-10-14 22:00:25,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:20" (2/3) ... [2019-10-14 22:00:25,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30053e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:00:25, skipping insertion in model container [2019-10-14 22:00:25,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:00:25" (3/3) ... [2019-10-14 22:00:25,701 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label20.c [2019-10-14 22:00:25,725 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:00:25,737 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:00:25,752 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:00:25,795 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:00:25,795 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:00:25,795 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:00:25,796 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:00:25,796 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:00:25,796 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:00:25,796 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:00:25,796 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:00:25,841 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-14 22:00:25,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 22:00:25,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:25,849 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:00:25,851 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:25,857 INFO L82 PathProgramCache]: Analyzing trace with hash 326484869, now seen corresponding path program 1 times [2019-10-14 22:00:25,867 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:25,868 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426820123] [2019-10-14 22:00:25,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:25,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:25,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:26,258 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 22:00:26,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426820123] [2019-10-14 22:00:26,261 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:00:26,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:00:26,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047301120] [2019-10-14 22:00:26,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:00:26,267 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:26,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:00:26,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:00:26,285 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 5 states. [2019-10-14 22:00:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:35,445 INFO L93 Difference]: Finished difference Result 2471 states and 4736 transitions. [2019-10-14 22:00:35,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 22:00:35,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-10-14 22:00:35,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:35,494 INFO L225 Difference]: With dead ends: 2471 [2019-10-14 22:00:35,494 INFO L226 Difference]: Without dead ends: 1568 [2019-10-14 22:00:35,511 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:00:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2019-10-14 22:00:35,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1553. [2019-10-14 22:00:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1553 states. [2019-10-14 22:00:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2833 transitions. [2019-10-14 22:00:35,692 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2833 transitions. Word has length 18 [2019-10-14 22:00:35,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:35,693 INFO L462 AbstractCegarLoop]: Abstraction has 1553 states and 2833 transitions. [2019-10-14 22:00:35,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:00:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2833 transitions. [2019-10-14 22:00:35,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-14 22:00:35,700 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:35,700 INFO L380 BasicCegarLoop]: trace histogram [2, 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, 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, 1, 1, 1, 1] [2019-10-14 22:00:35,701 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:35,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:35,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1701778415, now seen corresponding path program 1 times [2019-10-14 22:00:35,702 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:35,702 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653158984] [2019-10-14 22:00:35,703 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:35,703 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:35,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:00:36,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653158984] [2019-10-14 22:00:36,033 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:00:36,033 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:00:36,033 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518918961] [2019-10-14 22:00:36,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:00:36,035 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:36,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:00:36,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:00:36,036 INFO L87 Difference]: Start difference. First operand 1553 states and 2833 transitions. Second operand 8 states. [2019-10-14 22:00:47,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:47,951 INFO L93 Difference]: Finished difference Result 4751 states and 8585 transitions. [2019-10-14 22:00:47,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:00:47,952 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 91 [2019-10-14 22:00:47,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:47,980 INFO L225 Difference]: With dead ends: 4751 [2019-10-14 22:00:47,981 INFO L226 Difference]: Without dead ends: 3204 [2019-10-14 22:00:47,988 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:00:47,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2019-10-14 22:00:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 3149. [2019-10-14 22:00:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3149 states. [2019-10-14 22:00:48,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 4657 transitions. [2019-10-14 22:00:48,087 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 4657 transitions. Word has length 91 [2019-10-14 22:00:48,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:48,088 INFO L462 AbstractCegarLoop]: Abstraction has 3149 states and 4657 transitions. [2019-10-14 22:00:48,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:00:48,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 4657 transitions. [2019-10-14 22:00:48,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-14 22:00:48,091 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:48,091 INFO L380 BasicCegarLoop]: trace histogram [2, 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, 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, 1, 1, 1, 1, 1, 1] [2019-10-14 22:00:48,092 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:48,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:48,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2024884205, now seen corresponding path program 1 times [2019-10-14 22:00:48,092 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:48,092 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343320374] [2019-10-14 22:00:48,093 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:48,093 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:48,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 22:00:48,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343320374] [2019-10-14 22:00:48,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774978134] [2019-10-14 22:00:48,294 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 22:00:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:48,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 22:00:48,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:00:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 22:00:48,473 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:00:48,473 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-14 22:00:48,473 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490964662] [2019-10-14 22:00:48,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:00:48,476 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:48,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:00:48,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:00:48,477 INFO L87 Difference]: Start difference. First operand 3149 states and 4657 transitions. Second operand 8 states.