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/Problem11_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:59:43,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:59:43,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:59:43,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:59:43,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:59:43,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:59:43,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:59:43,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:59:43,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:59:43,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:59:43,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:59:43,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:59:43,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:59:43,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:59:43,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:59:43,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:59:43,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:59:43,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:59:43,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:59:43,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:59:43,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:59:43,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:59:43,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:59:43,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:59:43,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:59:43,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:59:43,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:59:43,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:59:43,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:59:43,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:59:43,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:59:43,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:59:43,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:59:43,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:59:43,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:59:43,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:59:43,249 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 21:59:43,280 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:59:43,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:59:43,281 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:59:43,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:59:43,286 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:59:43,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:59:43,287 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:59:43,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:59:43,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:59:43,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:59:43,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:59:43,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:59:43,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:59:43,288 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:59:43,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:59:43,289 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:59:43,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:59:43,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:59:43,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:59:43,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:59:43,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:59:43,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:59:43,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:59:43,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:59:43,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:59:43,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:59:43,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:59:43,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:59:43,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:59:43,576 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:59:43,598 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:59:43,605 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:59:43,607 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:59:43,608 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:59:43,609 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label50.c [2019-10-14 21:59:43,701 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a6e0e55/8d7f5c0673c44b46bfb2616eb790e5d5/FLAG0246bc8c8 [2019-10-14 21:59:44,312 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:59:44,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label50.c [2019-10-14 21:59:44,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a6e0e55/8d7f5c0673c44b46bfb2616eb790e5d5/FLAG0246bc8c8 [2019-10-14 21:59:44,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60a6e0e55/8d7f5c0673c44b46bfb2616eb790e5d5 [2019-10-14 21:59:44,553 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:59:44,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:59:44,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:59:44,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:59:44,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:59:44,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:59:44" (1/1) ... [2019-10-14 21:59:44,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2347579a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:44, skipping insertion in model container [2019-10-14 21:59:44,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:59:44" (1/1) ... [2019-10-14 21:59:44,573 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:59:44,628 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:59:45,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:59:45,626 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:59:45,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:59:45,763 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:59:45,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45 WrapperNode [2019-10-14 21:59:45,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:59:45,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:59:45,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:59:45,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:59:45,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (1/1) ... [2019-10-14 21:59:45,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (1/1) ... [2019-10-14 21:59:45,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (1/1) ... [2019-10-14 21:59:45,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (1/1) ... [2019-10-14 21:59:45,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (1/1) ... [2019-10-14 21:59:45,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (1/1) ... [2019-10-14 21:59:45,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (1/1) ... [2019-10-14 21:59:45,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:59:45,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:59:45,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:59:45,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:59:45,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (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 21:59:46,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:59:46,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:59:46,033 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:59:46,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:59:46,033 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:59:46,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:59:46,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:59:46,034 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:59:46,035 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:59:46,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:59:46,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:59:47,766 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:59:47,766 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:59:47,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:59:47 BoogieIcfgContainer [2019-10-14 21:59:47,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:59:47,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:59:47,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:59:47,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:59:47,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:59:44" (1/3) ... [2019-10-14 21:59:47,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4162fb19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:59:47, skipping insertion in model container [2019-10-14 21:59:47,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (2/3) ... [2019-10-14 21:59:47,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4162fb19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:59:47, skipping insertion in model container [2019-10-14 21:59:47,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:59:47" (3/3) ... [2019-10-14 21:59:47,780 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label50.c [2019-10-14 21:59:47,795 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:59:47,805 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:59:47,822 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:59:47,859 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:59:47,859 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:59:47,860 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:59:47,860 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:59:47,860 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:59:47,860 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:59:47,860 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:59:47,860 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:59:47,888 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-14 21:59:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:59:47,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:47,898 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] [2019-10-14 21:59:47,901 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:47,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:47,908 INFO L82 PathProgramCache]: Analyzing trace with hash -172206893, now seen corresponding path program 1 times [2019-10-14 21:59:47,918 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:47,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694423178] [2019-10-14 21:59:47,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:47,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:47,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:48,367 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 21:59:48,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694423178] [2019-10-14 21:59:48,368 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:48,369 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:59:48,369 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32983140] [2019-10-14 21:59:48,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:59:48,374 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:48,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:59:48,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:59:48,396 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-14 21:59:51,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:51,908 INFO L93 Difference]: Finished difference Result 1009 states and 1797 transitions. [2019-10-14 21:59:51,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:59:51,910 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-10-14 21:59:51,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:51,934 INFO L225 Difference]: With dead ends: 1009 [2019-10-14 21:59:51,934 INFO L226 Difference]: Without dead ends: 633 [2019-10-14 21:59:51,947 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:51,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-14 21:59:52,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 626. [2019-10-14 21:59:52,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-14 21:59:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 903 transitions. [2019-10-14 21:59:52,063 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 903 transitions. Word has length 42 [2019-10-14 21:59:52,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:52,063 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 903 transitions. [2019-10-14 21:59:52,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:59:52,064 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 903 transitions. [2019-10-14 21:59:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-14 21:59:52,073 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:52,073 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:52,075 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:52,076 INFO L82 PathProgramCache]: Analyzing trace with hash -258983758, now seen corresponding path program 1 times [2019-10-14 21:59:52,076 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:52,077 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286568552] [2019-10-14 21:59:52,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:52,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:52,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:52,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286568552] [2019-10-14 21:59:52,505 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:52,505 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:59:52,505 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910104925] [2019-10-14 21:59:52,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:59:52,508 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:52,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:59:52,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:59:52,509 INFO L87 Difference]: Start difference. First operand 626 states and 903 transitions. Second operand 9 states. [2019-10-14 21:59:55,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:55,521 INFO L93 Difference]: Finished difference Result 2436 states and 3670 transitions. [2019-10-14 21:59:55,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:59:55,521 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 114 [2019-10-14 21:59:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:55,535 INFO L225 Difference]: With dead ends: 2436 [2019-10-14 21:59:55,535 INFO L226 Difference]: Without dead ends: 1816 [2019-10-14 21:59:55,539 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:59:55,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2019-10-14 21:59:55,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1777. [2019-10-14 21:59:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1777 states. [2019-10-14 21:59:55,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2527 transitions. [2019-10-14 21:59:55,617 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2527 transitions. Word has length 114 [2019-10-14 21:59:55,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:55,617 INFO L462 AbstractCegarLoop]: Abstraction has 1777 states and 2527 transitions. [2019-10-14 21:59:55,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:59:55,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2527 transitions. [2019-10-14 21:59:55,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-14 21:59:55,623 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:55,623 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:55,624 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:55,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:55,624 INFO L82 PathProgramCache]: Analyzing trace with hash -590798395, now seen corresponding path program 1 times [2019-10-14 21:59:55,625 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:55,625 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426274078] [2019-10-14 21:59:55,625 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:55,625 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:55,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:55,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426274078] [2019-10-14 21:59:55,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656441267] [2019-10-14 21:59:55,846 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 21:59:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:55,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:59:55,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:56,008 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:56,008 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:59:56,009 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778120968] [2019-10-14 21:59:56,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:59:56,010 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:56,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:59:56,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:56,011 INFO L87 Difference]: Start difference. First operand 1777 states and 2527 transitions. Second operand 3 states. [2019-10-14 21:59:57,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:57,142 INFO L93 Difference]: Finished difference Result 4128 states and 5882 transitions. [2019-10-14 21:59:57,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:59:57,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2019-10-14 21:59:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:57,167 INFO L225 Difference]: With dead ends: 4128 [2019-10-14 21:59:57,167 INFO L226 Difference]: Without dead ends: 2357 [2019-10-14 21:59:57,174 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2019-10-14 21:59:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2349. [2019-10-14 21:59:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2019-10-14 21:59:57,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3262 transitions. [2019-10-14 21:59:57,290 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3262 transitions. Word has length 115 [2019-10-14 21:59:57,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:57,292 INFO L462 AbstractCegarLoop]: Abstraction has 2349 states and 3262 transitions. [2019-10-14 21:59:57,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:59:57,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3262 transitions. [2019-10-14 21:59:57,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-14 21:59:57,300 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:57,301 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:57,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:57,515 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:57,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:57,516 INFO L82 PathProgramCache]: Analyzing trace with hash -735764850, now seen corresponding path program 1 times [2019-10-14 21:59:57,516 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:57,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030264767] [2019-10-14 21:59:57,516 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:57,517 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:57,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:57,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030264767] [2019-10-14 21:59:57,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944532781] [2019-10-14 21:59:57,781 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 21:59:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:59:57,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:57,924 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:57,924 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:59:57,924 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820001153] [2019-10-14 21:59:57,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:59:57,925 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:57,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:59:57,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:57,926 INFO L87 Difference]: Start difference. First operand 2349 states and 3262 transitions. Second operand 3 states. [2019-10-14 21:59:58,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:58,947 INFO L93 Difference]: Finished difference Result 4704 states and 6572 transitions. [2019-10-14 21:59:58,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:59:58,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2019-10-14 21:59:58,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:58,961 INFO L225 Difference]: With dead ends: 4704 [2019-10-14 21:59:58,961 INFO L226 Difference]: Without dead ends: 2361 [2019-10-14 21:59:58,967 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2019-10-14 21:59:59,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2349. [2019-10-14 21:59:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2019-10-14 21:59:59,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3200 transitions. [2019-10-14 21:59:59,035 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3200 transitions. Word has length 116 [2019-10-14 21:59:59,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:59,035 INFO L462 AbstractCegarLoop]: Abstraction has 2349 states and 3200 transitions. [2019-10-14 21:59:59,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:59:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3200 transitions. [2019-10-14 21:59:59,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-14 21:59:59,038 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:59,039 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:59,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:59,244 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:59,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:59,244 INFO L82 PathProgramCache]: Analyzing trace with hash 865187038, now seen corresponding path program 1 times [2019-10-14 21:59:59,244 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:59,245 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976778407] [2019-10-14 21:59:59,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:59,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:59,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:59,454 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976778407] [2019-10-14 21:59:59,454 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:59,454 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:59:59,455 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021945490] [2019-10-14 21:59:59,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:59:59,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:59,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:59:59,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:59,459 INFO L87 Difference]: Start difference. First operand 2349 states and 3200 transitions. Second operand 7 states. [2019-10-14 22:00:04,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:04,084 INFO L93 Difference]: Finished difference Result 6927 states and 10053 transitions. [2019-10-14 22:00:04,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 22:00:04,084 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 140 [2019-10-14 22:00:04,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:04,112 INFO L225 Difference]: With dead ends: 6927 [2019-10-14 22:00:04,112 INFO L226 Difference]: Without dead ends: 4584 [2019-10-14 22:00:04,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:00:04,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2019-10-14 22:00:04,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 4527. [2019-10-14 22:00:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4527 states. [2019-10-14 22:00:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4527 states to 4527 states and 5966 transitions. [2019-10-14 22:00:04,338 INFO L78 Accepts]: Start accepts. Automaton has 4527 states and 5966 transitions. Word has length 140 [2019-10-14 22:00:04,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:04,339 INFO L462 AbstractCegarLoop]: Abstraction has 4527 states and 5966 transitions. [2019-10-14 22:00:04,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 22:00:04,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4527 states and 5966 transitions. [2019-10-14 22:00:04,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-14 22:00:04,344 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:04,344 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, 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] [2019-10-14 22:00:04,345 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:04,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:04,345 INFO L82 PathProgramCache]: Analyzing trace with hash 141894414, now seen corresponding path program 1 times [2019-10-14 22:00:04,345 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:04,346 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722172507] [2019-10-14 22:00:04,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:04,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:04,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:00:04,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722172507] [2019-10-14 22:00:04,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088702690] [2019-10-14 22:00:04,651 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 22:00:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:04,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:00:04,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:00:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:00:04,794 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:00:04,795 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-10-14 22:00:04,795 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904612202] [2019-10-14 22:00:04,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:00:04,796 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:04,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:00:04,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:00:04,797 INFO L87 Difference]: Start difference. First operand 4527 states and 5966 transitions. Second operand 8 states. [2019-10-14 22:00:07,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:07,189 INFO L93 Difference]: Finished difference Result 10872 states and 15386 transitions. [2019-10-14 22:00:07,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:00:07,190 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 187 [2019-10-14 22:00:07,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:07,225 INFO L225 Difference]: With dead ends: 10872 [2019-10-14 22:00:07,226 INFO L226 Difference]: Without dead ends: 6539 [2019-10-14 22:00:07,242 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:00:07,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2019-10-14 22:00:07,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6074. [2019-10-14 22:00:07,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6074 states. [2019-10-14 22:00:07,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6074 states to 6074 states and 7779 transitions. [2019-10-14 22:00:07,413 INFO L78 Accepts]: Start accepts. Automaton has 6074 states and 7779 transitions. Word has length 187 [2019-10-14 22:00:07,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:07,414 INFO L462 AbstractCegarLoop]: Abstraction has 6074 states and 7779 transitions. [2019-10-14 22:00:07,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:00:07,414 INFO L276 IsEmpty]: Start isEmpty. Operand 6074 states and 7779 transitions. [2019-10-14 22:00:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-10-14 22:00:07,419 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:07,419 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, 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] [2019-10-14 22:00:07,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:00:07,623 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:07,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:07,624 INFO L82 PathProgramCache]: Analyzing trace with hash -12858038, now seen corresponding path program 1 times [2019-10-14 22:00:07,624 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:07,624 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891905555] [2019-10-14 22:00:07,624 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:07,625 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:07,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 22:00:07,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891905555] [2019-10-14 22:00:07,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515189053] [2019-10-14 22:00:07,961 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 22:00:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:08,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 22:00:08,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:00:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 22:00:08,155 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:00:08,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 22:00:08,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861052484] [2019-10-14 22:00:08,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:00:08,158 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:08,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:00:08,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:00:08,159 INFO L87 Difference]: Start difference. First operand 6074 states and 7779 transitions. Second operand 3 states. [2019-10-14 22:00:09,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:09,498 INFO L93 Difference]: Finished difference Result 13288 states and 17008 transitions. [2019-10-14 22:00:09,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:00:09,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2019-10-14 22:00:09,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:09,541 INFO L225 Difference]: With dead ends: 13288 [2019-10-14 22:00:09,541 INFO L226 Difference]: Without dead ends: 7220 [2019-10-14 22:00:09,555 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 209 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:00:09,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7220 states. [2019-10-14 22:00:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7220 to 6464. [2019-10-14 22:00:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6464 states. [2019-10-14 22:00:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6464 states to 6464 states and 8226 transitions. [2019-10-14 22:00:09,769 INFO L78 Accepts]: Start accepts. Automaton has 6464 states and 8226 transitions. Word has length 205 [2019-10-14 22:00:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:09,770 INFO L462 AbstractCegarLoop]: Abstraction has 6464 states and 8226 transitions. [2019-10-14 22:00:09,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:00:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 6464 states and 8226 transitions. [2019-10-14 22:00:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-10-14 22:00:09,777 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:09,778 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, 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] [2019-10-14 22:00:09,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:00:09,989 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:09,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:09,990 INFO L82 PathProgramCache]: Analyzing trace with hash 740362904, now seen corresponding path program 1 times [2019-10-14 22:00:09,990 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:09,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757816381] [2019-10-14 22:00:09,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:09,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:09,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 66 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:00:10,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757816381] [2019-10-14 22:00:10,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757892074] [2019-10-14 22:00:10,404 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 22:00:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:10,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:00:10,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:00:10,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:00:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 22:00:10,738 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:00:10,738 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2019-10-14 22:00:10,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96386742] [2019-10-14 22:00:10,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:00:10,743 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:10,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:00:10,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:00:10,744 INFO L87 Difference]: Start difference. First operand 6464 states and 8226 transitions. Second operand 5 states. [2019-10-14 22:00:12,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:12,423 INFO L93 Difference]: Finished difference Result 12993 states and 16652 transitions. [2019-10-14 22:00:12,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:00:12,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 209 [2019-10-14 22:00:12,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:12,445 INFO L225 Difference]: With dead ends: 12993 [2019-10-14 22:00:12,445 INFO L226 Difference]: Without dead ends: 6535 [2019-10-14 22:00:12,462 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2019-10-14 22:00:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6535 states. [2019-10-14 22:00:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6535 to 6502. [2019-10-14 22:00:12,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6502 states. [2019-10-14 22:00:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6502 states to 6502 states and 8317 transitions. [2019-10-14 22:00:12,597 INFO L78 Accepts]: Start accepts. Automaton has 6502 states and 8317 transitions. Word has length 209 [2019-10-14 22:00:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:12,597 INFO L462 AbstractCegarLoop]: Abstraction has 6502 states and 8317 transitions. [2019-10-14 22:00:12,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:00:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 6502 states and 8317 transitions. [2019-10-14 22:00:12,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-10-14 22:00:12,604 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:12,604 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, 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] [2019-10-14 22:00:12,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:00:12,809 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:12,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:12,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1863264608, now seen corresponding path program 1 times [2019-10-14 22:00:12,810 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:12,814 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097929242] [2019-10-14 22:00:12,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:12,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:12,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:00:13,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097929242] [2019-10-14 22:00:13,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575417423] [2019-10-14 22:00:13,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:00:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:13,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:00:13,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:00:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:00:13,335 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:00:13,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:00:13,335 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555370726] [2019-10-14 22:00:13,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:00:13,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:13,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:00:13,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:00:13,337 INFO L87 Difference]: Start difference. First operand 6502 states and 8317 transitions. Second operand 11 states. [2019-10-14 22:00:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:16,738 INFO L93 Difference]: Finished difference Result 14926 states and 20105 transitions. [2019-10-14 22:00:16,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 22:00:16,739 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 244 [2019-10-14 22:00:16,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:16,767 INFO L225 Difference]: With dead ends: 14926 [2019-10-14 22:00:16,767 INFO L226 Difference]: Without dead ends: 8430 [2019-10-14 22:00:16,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2019-10-14 22:00:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8430 states. [2019-10-14 22:00:16,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8430 to 8270. [2019-10-14 22:00:16,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8270 states. [2019-10-14 22:00:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8270 states to 8270 states and 10481 transitions. [2019-10-14 22:00:16,956 INFO L78 Accepts]: Start accepts. Automaton has 8270 states and 10481 transitions. Word has length 244 [2019-10-14 22:00:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:16,957 INFO L462 AbstractCegarLoop]: Abstraction has 8270 states and 10481 transitions. [2019-10-14 22:00:16,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:00:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 8270 states and 10481 transitions. [2019-10-14 22:00:16,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-10-14 22:00:16,964 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:16,965 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, 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, 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] [2019-10-14 22:00:17,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:00:17,177 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:17,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:17,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1936845333, now seen corresponding path program 1 times [2019-10-14 22:00:17,177 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:17,177 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910520611] [2019-10-14 22:00:17,178 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:17,178 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:17,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 87 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:00:17,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910520611] [2019-10-14 22:00:17,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831782432] [2019-10-14 22:00:17,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:00:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:17,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 22:00:17,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:00:17,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:00:17,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:00:18,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:00:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 71 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:00:18,230 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:00:18,230 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2019-10-14 22:00:18,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771381529] [2019-10-14 22:00:18,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 22:00:18,231 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:18,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 22:00:18,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-14 22:00:18,232 INFO L87 Difference]: Start difference. First operand 8270 states and 10481 transitions. Second operand 18 states.