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/Problem10_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:56:55,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:56:55,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:56:55,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:56:55,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:56:55,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:56:55,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:56:55,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:56:55,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:56:55,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:56:55,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:56:55,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:56:55,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:56:55,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:56:55,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:56:55,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:56:55,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:56:55,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:56:55,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:56:55,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:56:55,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:56:55,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:56:55,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:56:55,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:56:55,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:56:55,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:56:55,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:56:55,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:56:55,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:56:55,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:56:55,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:56:55,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:56:55,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:56:55,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:56:55,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:56:55,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:56:55,216 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 21:56:55,234 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:56:55,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:56:55,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:56:55,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:56:55,237 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:56:55,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:56:55,237 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:56:55,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:56:55,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:56:55,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:56:55,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:56:55,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:56:55,239 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:56:55,240 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:56:55,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:56:55,240 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:56:55,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:56:55,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:56:55,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:56:55,241 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:56:55,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:56:55,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:56:55,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:56:55,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:56:55,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:56:55,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:56:55,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:56:55,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:56:55,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:56:55,506 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:56:55,518 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:56:55,522 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:56:55,523 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:56:55,523 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:56:55,524 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label23.c [2019-10-14 21:56:55,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ff6d3bd9/cf7a2022695044079ef9110b28425301/FLAG7cb3cc75e [2019-10-14 21:56:56,126 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:56:56,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label23.c [2019-10-14 21:56:56,137 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ff6d3bd9/cf7a2022695044079ef9110b28425301/FLAG7cb3cc75e [2019-10-14 21:56:56,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ff6d3bd9/cf7a2022695044079ef9110b28425301 [2019-10-14 21:56:56,435 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:56:56,436 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:56:56,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:56:56,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:56:56,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:56:56,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:56:56" (1/1) ... [2019-10-14 21:56:56,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39cbab6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:56, skipping insertion in model container [2019-10-14 21:56:56,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:56:56" (1/1) ... [2019-10-14 21:56:56,452 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:56:56,511 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:56:57,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:56:57,043 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:56:57,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:56:57,203 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:56:57,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:57 WrapperNode [2019-10-14 21:56:57,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:56:57,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:56:57,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:56:57,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:56:57,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:57" (1/1) ... [2019-10-14 21:56:57,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:57" (1/1) ... [2019-10-14 21:56:57,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:57" (1/1) ... [2019-10-14 21:56:57,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:57" (1/1) ... [2019-10-14 21:56:57,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:57" (1/1) ... [2019-10-14 21:56:57,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:57" (1/1) ... [2019-10-14 21:56:57,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:57" (1/1) ... [2019-10-14 21:56:57,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:56:57,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:56:57,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:56:57,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:56:57,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:57" (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 21:56:57,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:56:57,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:56:57,471 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:56:57,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:56:57,471 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:56:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:56:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:56:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:56:57,473 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:56:57,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:56:57,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:56:58,894 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:56:58,894 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:56:58,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:56:58 BoogieIcfgContainer [2019-10-14 21:56:58,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:56:58,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:56:58,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:56:58,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:56:58,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:56:56" (1/3) ... [2019-10-14 21:56:58,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0b33a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:56:58, skipping insertion in model container [2019-10-14 21:56:58,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:57" (2/3) ... [2019-10-14 21:56:58,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0b33a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:56:58, skipping insertion in model container [2019-10-14 21:56:58,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:56:58" (3/3) ... [2019-10-14 21:56:58,904 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label23.c [2019-10-14 21:56:58,913 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:56:58,921 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:56:58,932 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:56:58,958 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:56:58,959 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:56:58,959 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:56:58,959 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:56:58,959 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:56:58,959 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:56:58,960 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:56:58,960 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:56:58,988 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-14 21:56:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:56:58,996 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:56:58,997 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:56:58,998 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:56:59,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:56:59,002 INFO L82 PathProgramCache]: Analyzing trace with hash -2063812481, now seen corresponding path program 1 times [2019-10-14 21:56:59,009 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:56:59,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449688947] [2019-10-14 21:56:59,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:59,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:59,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:56:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:56:59,385 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 21:56:59,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449688947] [2019-10-14 21:56:59,387 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:56:59,388 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:56:59,388 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228563027] [2019-10-14 21:56:59,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:56:59,396 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:56:59,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:56:59,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:56:59,413 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-14 21:57:01,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:01,553 INFO L93 Difference]: Finished difference Result 730 states and 1301 transitions. [2019-10-14 21:57:01,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:57:01,554 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-10-14 21:57:01,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:01,572 INFO L225 Difference]: With dead ends: 730 [2019-10-14 21:57:01,573 INFO L226 Difference]: Without dead ends: 447 [2019-10-14 21:57:01,581 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:57:01,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-14 21:57:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441. [2019-10-14 21:57:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-10-14 21:57:01,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 672 transitions. [2019-10-14 21:57:01,731 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 672 transitions. Word has length 52 [2019-10-14 21:57:01,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:01,732 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 672 transitions. [2019-10-14 21:57:01,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:57:01,733 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 672 transitions. [2019-10-14 21:57:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 21:57:01,750 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:01,750 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:57:01,751 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:01,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:01,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1911288886, now seen corresponding path program 1 times [2019-10-14 21:57:01,751 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:01,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447212546] [2019-10-14 21:57:01,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:01,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:01,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:02,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447212546] [2019-10-14 21:57:02,086 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:57:02,087 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:57:02,087 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615870615] [2019-10-14 21:57:02,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:57:02,089 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:02,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:57:02,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:57:02,090 INFO L87 Difference]: Start difference. First operand 441 states and 672 transitions. Second operand 8 states. [2019-10-14 21:57:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:04,314 INFO L93 Difference]: Finished difference Result 1673 states and 2829 transitions. [2019-10-14 21:57:04,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:57:04,316 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2019-10-14 21:57:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:04,328 INFO L225 Difference]: With dead ends: 1673 [2019-10-14 21:57:04,329 INFO L226 Difference]: Without dead ends: 1238 [2019-10-14 21:57:04,332 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:57:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2019-10-14 21:57:04,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1196. [2019-10-14 21:57:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1196 states. [2019-10-14 21:57:04,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1791 transitions. [2019-10-14 21:57:04,402 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1791 transitions. Word has length 134 [2019-10-14 21:57:04,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:04,403 INFO L462 AbstractCegarLoop]: Abstraction has 1196 states and 1791 transitions. [2019-10-14 21:57:04,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:57:04,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1791 transitions. [2019-10-14 21:57:04,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-14 21:57:04,406 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:04,407 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:57:04,407 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:04,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:04,407 INFO L82 PathProgramCache]: Analyzing trace with hash 614464170, now seen corresponding path program 1 times [2019-10-14 21:57:04,408 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:04,408 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892137197] [2019-10-14 21:57:04,408 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:04,408 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:04,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:04,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892137197] [2019-10-14 21:57:04,657 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:57:04,657 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:57:04,658 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285350646] [2019-10-14 21:57:04,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:57:04,658 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:04,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:57:04,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:57:04,659 INFO L87 Difference]: Start difference. First operand 1196 states and 1791 transitions. Second operand 9 states. [2019-10-14 21:57:06,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:06,468 INFO L93 Difference]: Finished difference Result 3485 states and 5791 transitions. [2019-10-14 21:57:06,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:57:06,469 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 150 [2019-10-14 21:57:06,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:06,486 INFO L225 Difference]: With dead ends: 3485 [2019-10-14 21:57:06,486 INFO L226 Difference]: Without dead ends: 2295 [2019-10-14 21:57:06,491 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:57:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2019-10-14 21:57:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1822. [2019-10-14 21:57:06,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1822 states. [2019-10-14 21:57:06,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2776 transitions. [2019-10-14 21:57:06,589 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2776 transitions. Word has length 150 [2019-10-14 21:57:06,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:06,590 INFO L462 AbstractCegarLoop]: Abstraction has 1822 states and 2776 transitions. [2019-10-14 21:57:06,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:57:06,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2776 transitions. [2019-10-14 21:57:06,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-14 21:57:06,595 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:06,595 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:06,595 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:06,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:06,596 INFO L82 PathProgramCache]: Analyzing trace with hash 628433146, now seen corresponding path program 1 times [2019-10-14 21:57:06,596 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:06,596 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374407276] [2019-10-14 21:57:06,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:06,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:06,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:06,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374407276] [2019-10-14 21:57:06,872 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:57:06,873 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:57:06,873 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956682116] [2019-10-14 21:57:06,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:57:06,874 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:06,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:57:06,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:57:06,875 INFO L87 Difference]: Start difference. First operand 1822 states and 2776 transitions. Second operand 9 states. [2019-10-14 21:57:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:08,176 INFO L93 Difference]: Finished difference Result 4429 states and 7107 transitions. [2019-10-14 21:57:08,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:57:08,176 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 174 [2019-10-14 21:57:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:08,200 INFO L225 Difference]: With dead ends: 4429 [2019-10-14 21:57:08,200 INFO L226 Difference]: Without dead ends: 2613 [2019-10-14 21:57:08,207 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:57:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2019-10-14 21:57:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2269. [2019-10-14 21:57:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2269 states. [2019-10-14 21:57:08,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3105 transitions. [2019-10-14 21:57:08,299 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3105 transitions. Word has length 174 [2019-10-14 21:57:08,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:08,301 INFO L462 AbstractCegarLoop]: Abstraction has 2269 states and 3105 transitions. [2019-10-14 21:57:08,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:57:08,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3105 transitions. [2019-10-14 21:57:08,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-14 21:57:08,306 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:08,306 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:08,307 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash 880887528, now seen corresponding path program 1 times [2019-10-14 21:57:08,307 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:08,308 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548093081] [2019-10-14 21:57:08,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:08,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:08,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:57:08,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548093081] [2019-10-14 21:57:08,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782952041] [2019-10-14 21:57:08,616 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 21:57:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:08,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:57:08,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:08,889 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:08,890 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 21:57:08,890 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845197622] [2019-10-14 21:57:08,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:57:08,891 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:08,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:57:08,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:57:08,892 INFO L87 Difference]: Start difference. First operand 2269 states and 3105 transitions. Second operand 12 states. [2019-10-14 21:57:12,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:12,632 INFO L93 Difference]: Finished difference Result 6171 states and 8798 transitions. [2019-10-14 21:57:12,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:57:12,636 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 213 [2019-10-14 21:57:12,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:12,658 INFO L225 Difference]: With dead ends: 6171 [2019-10-14 21:57:12,658 INFO L226 Difference]: Without dead ends: 3763 [2019-10-14 21:57:12,668 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:57:12,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3763 states. [2019-10-14 21:57:12,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3763 to 3155. [2019-10-14 21:57:12,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3155 states. [2019-10-14 21:57:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 4139 transitions. [2019-10-14 21:57:12,789 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 4139 transitions. Word has length 213 [2019-10-14 21:57:12,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:12,789 INFO L462 AbstractCegarLoop]: Abstraction has 3155 states and 4139 transitions. [2019-10-14 21:57:12,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:57:12,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 4139 transitions. [2019-10-14 21:57:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-10-14 21:57:12,797 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:12,798 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:57:13,003 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:13,003 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:13,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:13,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1030862380, now seen corresponding path program 1 times [2019-10-14 21:57:13,004 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:13,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901776171] [2019-10-14 21:57:13,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:13,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:13,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-14 21:57:13,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901776171] [2019-10-14 21:57:13,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187692681] [2019-10-14 21:57:13,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:13,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:57:13,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-14 21:57:13,506 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:57:13,507 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:57:13,507 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569292210] [2019-10-14 21:57:13,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:57:13,508 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:13,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:57:13,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:57:13,509 INFO L87 Difference]: Start difference. First operand 3155 states and 4139 transitions. Second operand 3 states. [2019-10-14 21:57:13,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:13,986 INFO L93 Difference]: Finished difference Result 6304 states and 8275 transitions. [2019-10-14 21:57:13,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:57:13,986 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 227 [2019-10-14 21:57:13,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:14,000 INFO L225 Difference]: With dead ends: 6304 [2019-10-14 21:57:14,000 INFO L226 Difference]: Without dead ends: 3155 [2019-10-14 21:57:14,010 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:57:14,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3155 states. [2019-10-14 21:57:14,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 2863. [2019-10-14 21:57:14,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2863 states. [2019-10-14 21:57:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 3526 transitions. [2019-10-14 21:57:14,130 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 3526 transitions. Word has length 227 [2019-10-14 21:57:14,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:14,131 INFO L462 AbstractCegarLoop]: Abstraction has 2863 states and 3526 transitions. [2019-10-14 21:57:14,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:57:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 3526 transitions. [2019-10-14 21:57:14,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-14 21:57:14,137 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:14,137 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:57:14,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:14,342 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:14,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:14,343 INFO L82 PathProgramCache]: Analyzing trace with hash -746901927, now seen corresponding path program 1 times [2019-10-14 21:57:14,343 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:14,344 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595064136] [2019-10-14 21:57:14,344 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:14,345 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:14,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 122 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:57:14,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595064136] [2019-10-14 21:57:14,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182152911] [2019-10-14 21:57:14,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:14,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:57:14,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-14 21:57:14,856 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:57:14,856 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2019-10-14 21:57:14,856 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027281651] [2019-10-14 21:57:14,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:57:14,857 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:14,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:57:14,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:57:14,858 INFO L87 Difference]: Start difference. First operand 2863 states and 3526 transitions. Second operand 5 states. [2019-10-14 21:57:15,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:15,785 INFO L93 Difference]: Finished difference Result 5881 states and 7248 transitions. [2019-10-14 21:57:15,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:57:15,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 230 [2019-10-14 21:57:15,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:15,798 INFO L225 Difference]: With dead ends: 5881 [2019-10-14 21:57:15,798 INFO L226 Difference]: Without dead ends: 3024 [2019-10-14 21:57:15,806 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:57:15,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2019-10-14 21:57:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2873. [2019-10-14 21:57:15,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2873 states. [2019-10-14 21:57:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 3540 transitions. [2019-10-14 21:57:15,885 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 3540 transitions. Word has length 230 [2019-10-14 21:57:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:15,886 INFO L462 AbstractCegarLoop]: Abstraction has 2873 states and 3540 transitions. [2019-10-14 21:57:15,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:57:15,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 3540 transitions. [2019-10-14 21:57:15,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2019-10-14 21:57:15,896 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:15,896 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2019-10-14 21:57:16,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:16,108 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:16,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:16,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1494032993, now seen corresponding path program 1 times [2019-10-14 21:57:16,108 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:16,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273519630] [2019-10-14 21:57:16,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:16,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:16,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 286 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-14 21:57:16,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273519630] [2019-10-14 21:57:16,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967995205] [2019-10-14 21:57:16,395 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 [2019-10-14 21:57:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:16,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:57:16,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 288 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:57:16,737 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:16,738 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:57:16,738 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225976030] [2019-10-14 21:57:16,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:57:16,740 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:16,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:57:16,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:57:16,741 INFO L87 Difference]: Start difference. First operand 2873 states and 3540 transitions. Second operand 11 states. [2019-10-14 21:57:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:19,497 INFO L93 Difference]: Finished difference Result 6343 states and 8386 transitions. [2019-10-14 21:57:19,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:57:19,498 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 301 [2019-10-14 21:57:19,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:19,528 INFO L225 Difference]: With dead ends: 6343 [2019-10-14 21:57:19,529 INFO L226 Difference]: Without dead ends: 3619 [2019-10-14 21:57:19,540 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:57:19,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2019-10-14 21:57:19,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3432. [2019-10-14 21:57:19,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3432 states. [2019-10-14 21:57:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 4591 transitions. [2019-10-14 21:57:19,699 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 4591 transitions. Word has length 301 [2019-10-14 21:57:19,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:19,700 INFO L462 AbstractCegarLoop]: Abstraction has 3432 states and 4591 transitions. [2019-10-14 21:57:19,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:57:19,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 4591 transitions. [2019-10-14 21:57:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2019-10-14 21:57:19,720 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:19,720 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2019-10-14 21:57:19,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:19,925 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:19,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:19,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1693644177, now seen corresponding path program 1 times [2019-10-14 21:57:19,930 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:19,930 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207779495] [2019-10-14 21:57:19,930 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:19,930 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:19,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 4 proven. 387 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:57:21,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207779495] [2019-10-14 21:57:21,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523214611] [2019-10-14 21:57:21,046 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 [2019-10-14 21:57:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:21,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:57:21,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:21,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:21,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:21,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:21,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:21,210 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:21,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:21,212 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:21,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms