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/Problem16_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:05:28,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:05:28,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:05:28,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:05:28,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:05:28,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:05:28,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:05:28,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:05:28,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:05:28,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:05:28,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:05:28,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:05:28,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:05:28,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:05:28,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:05:28,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:05:28,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:05:28,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:05:28,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:05:28,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:05:28,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:05:28,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:05:28,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:05:28,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:05:28,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:05:28,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:05:28,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:05:28,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:05:28,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:05:28,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:05:28,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:05:28,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:05:28,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:05:28,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:05:28,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:05:28,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:05:28,878 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:05:28,892 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:05:28,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:05:28,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:05:28,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:05:28,893 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:05:28,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:05:28,894 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:05:28,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:05:28,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:05:28,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:05:28,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:05:28,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:05:28,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:05:28,895 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:05:28,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:05:28,896 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:05:28,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:05:28,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:05:28,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:05:28,897 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:05:28,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:05:28,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:28,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:05:28,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:05:28,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:05:28,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:05:28,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:05:28,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:05:28,898 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:05:29,211 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:05:29,224 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:05:29,228 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:05:29,230 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:05:29,230 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:05:29,231 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label29.c [2019-10-13 18:05:29,327 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3d746dc9/f76f8be23e2c4282bf2ef6a1934d000e/FLAG82a7b444a [2019-10-13 18:05:30,037 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:05:30,038 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label29.c [2019-10-13 18:05:30,055 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3d746dc9/f76f8be23e2c4282bf2ef6a1934d000e/FLAG82a7b444a [2019-10-13 18:05:30,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3d746dc9/f76f8be23e2c4282bf2ef6a1934d000e [2019-10-13 18:05:30,206 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:05:30,208 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:05:30,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:30,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:05:30,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:05:30,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:30" (1/1) ... [2019-10-13 18:05:30,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@665abbeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:30, skipping insertion in model container [2019-10-13 18:05:30,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:30" (1/1) ... [2019-10-13 18:05:30,227 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:05:30,314 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:05:31,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:31,149 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:05:31,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:31,526 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:05:31,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:31 WrapperNode [2019-10-13 18:05:31,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:31,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:05:31,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:05:31,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:05:31,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:31" (1/1) ... [2019-10-13 18:05:31,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:31" (1/1) ... [2019-10-13 18:05:31,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:31" (1/1) ... [2019-10-13 18:05:31,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:31" (1/1) ... [2019-10-13 18:05:31,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:31" (1/1) ... [2019-10-13 18:05:31,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:31" (1/1) ... [2019-10-13 18:05:31,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:31" (1/1) ... [2019-10-13 18:05:31,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:05:31,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:05:31,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:05:31,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:05:31,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:31,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:05:31,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:05:31,803 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:05:31,803 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:05:31,803 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:05:31,803 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:05:31,804 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:05:31,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:05:31,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:05:31,804 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:05:31,804 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:05:31,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:05:31,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:05:34,156 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:05:34,157 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:05:34,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:34 BoogieIcfgContainer [2019-10-13 18:05:34,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:05:34,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:05:34,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:05:34,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:05:34,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:05:30" (1/3) ... [2019-10-13 18:05:34,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cfaf91b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:34, skipping insertion in model container [2019-10-13 18:05:34,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:31" (2/3) ... [2019-10-13 18:05:34,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cfaf91b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:34, skipping insertion in model container [2019-10-13 18:05:34,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:34" (3/3) ... [2019-10-13 18:05:34,177 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label29.c [2019-10-13 18:05:34,193 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:05:34,205 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:05:34,218 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:05:34,265 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:05:34,265 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:05:34,265 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:05:34,265 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:05:34,265 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:05:34,266 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:05:34,266 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:05:34,266 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:05:34,301 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:05:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 18:05:34,311 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:34,312 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] [2019-10-13 18:05:34,314 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:34,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1301398987, now seen corresponding path program 1 times [2019-10-13 18:05:34,330 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:34,331 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585647123] [2019-10-13 18:05:34,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:34,332 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:34,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:34,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585647123] [2019-10-13 18:05:34,677 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:34,677 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:05:34,678 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743058232] [2019-10-13 18:05:34,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:34,683 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:34,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:34,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:05:34,701 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:05:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:40,063 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-13 18:05:40,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:05:40,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-10-13 18:05:40,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:40,094 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:05:40,094 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:05:40,103 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 [2019-10-13 18:05:40,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:05:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:05:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:05:40,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2019-10-13 18:05:40,230 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 52 [2019-10-13 18:05:40,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:40,231 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2019-10-13 18:05:40,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:40,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2019-10-13 18:05:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-13 18:05:40,244 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:40,245 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:40,245 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:40,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:40,245 INFO L82 PathProgramCache]: Analyzing trace with hash -498419979, now seen corresponding path program 1 times [2019-10-13 18:05:40,246 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:40,246 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88206397] [2019-10-13 18:05:40,246 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:40,247 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:40,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 90 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:40,829 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88206397] [2019-10-13 18:05:40,829 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917468435] [2019-10-13 18:05:40,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:40,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:40,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 18:05:41,107 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:41,107 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-13 18:05:41,108 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697905055] [2019-10-13 18:05:41,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:41,113 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:41,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:41,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:41,114 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand 5 states. [2019-10-13 18:05:44,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:44,718 INFO L93 Difference]: Finished difference Result 3129 states and 5063 transitions. [2019-10-13 18:05:44,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:05:44,719 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 234 [2019-10-13 18:05:44,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:44,735 INFO L225 Difference]: With dead ends: 3129 [2019-10-13 18:05:44,735 INFO L226 Difference]: Without dead ends: 2104 [2019-10-13 18:05:44,740 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:44,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2019-10-13 18:05:44,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2083. [2019-10-13 18:05:44,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2019-10-13 18:05:44,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3187 transitions. [2019-10-13 18:05:44,839 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3187 transitions. Word has length 234 [2019-10-13 18:05:44,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:44,843 INFO L462 AbstractCegarLoop]: Abstraction has 2083 states and 3187 transitions. [2019-10-13 18:05:44,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3187 transitions. [2019-10-13 18:05:44,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2019-10-13 18:05:44,856 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:44,857 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:45,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:45,063 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:45,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:45,064 INFO L82 PathProgramCache]: Analyzing trace with hash 567814956, now seen corresponding path program 1 times [2019-10-13 18:05:45,065 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:45,065 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110782962] [2019-10-13 18:05:45,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:45,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:45,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 90 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:45,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110782962] [2019-10-13 18:05:45,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602847951] [2019-10-13 18:05:45,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:45,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:45,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 18:05:45,851 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:45,852 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:45,852 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132433383] [2019-10-13 18:05:45,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:45,855 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:45,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:45,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:45,856 INFO L87 Difference]: Start difference. First operand 2083 states and 3187 transitions. Second operand 5 states. [2019-10-13 18:05:48,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:48,785 INFO L93 Difference]: Finished difference Result 6311 states and 9954 transitions. [2019-10-13 18:05:48,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:05:48,785 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 269 [2019-10-13 18:05:48,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:48,812 INFO L225 Difference]: With dead ends: 6311 [2019-10-13 18:05:48,812 INFO L226 Difference]: Without dead ends: 4234 [2019-10-13 18:05:48,819 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:05:48,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2019-10-13 18:05:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4198. [2019-10-13 18:05:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2019-10-13 18:05:48,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5791 transitions. [2019-10-13 18:05:49,000 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5791 transitions. Word has length 269 [2019-10-13 18:05:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:49,002 INFO L462 AbstractCegarLoop]: Abstraction has 4198 states and 5791 transitions. [2019-10-13 18:05:49,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5791 transitions. [2019-10-13 18:05:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-10-13 18:05:49,008 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:49,009 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, 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] [2019-10-13 18:05:49,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:49,222 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:49,223 INFO L82 PathProgramCache]: Analyzing trace with hash -848339884, now seen corresponding path program 1 times [2019-10-13 18:05:49,224 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:49,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186969431] [2019-10-13 18:05:49,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:49,225 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:49,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 18:05:49,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186969431] [2019-10-13 18:05:49,712 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412727379] [2019-10-13 18:05:49,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:49,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:49,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:50,107 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:50,107 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 18:05:50,108 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422697787] [2019-10-13 18:05:50,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:05:50,110 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:50,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:05:50,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:50,110 INFO L87 Difference]: Start difference. First operand 4198 states and 5791 transitions. Second operand 12 states. [2019-10-13 18:05:57,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:57,729 INFO L93 Difference]: Finished difference Result 13272 states and 19292 transitions. [2019-10-13 18:05:57,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 18:05:57,729 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 281 [2019-10-13 18:05:57,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:57,767 INFO L225 Difference]: With dead ends: 13272 [2019-10-13 18:05:57,767 INFO L226 Difference]: Without dead ends: 7642 [2019-10-13 18:05:57,784 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 289 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:05:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2019-10-13 18:05:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 5899. [2019-10-13 18:05:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5899 states. [2019-10-13 18:05:57,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5899 states to 5899 states and 6784 transitions. [2019-10-13 18:05:57,942 INFO L78 Accepts]: Start accepts. Automaton has 5899 states and 6784 transitions. Word has length 281 [2019-10-13 18:05:57,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:57,943 INFO L462 AbstractCegarLoop]: Abstraction has 5899 states and 6784 transitions. [2019-10-13 18:05:57,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:05:57,944 INFO L276 IsEmpty]: Start isEmpty. Operand 5899 states and 6784 transitions. [2019-10-13 18:05:57,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2019-10-13 18:05:57,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:57,960 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2019-10-13 18:05:58,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:58,165 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:58,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:58,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1589807869, now seen corresponding path program 1 times [2019-10-13 18:05:58,166 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:58,167 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671722116] [2019-10-13 18:05:58,167 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:58,168 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:58,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 180 proven. 345 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2019-10-13 18:05:58,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671722116] [2019-10-13 18:05:58,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912864453] [2019-10-13 18:05:58,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:59,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:59,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 402 proven. 0 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2019-10-13 18:05:59,376 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:59,376 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:59,376 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068655117] [2019-10-13 18:05:59,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:59,378 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:59,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:59,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:59,378 INFO L87 Difference]: Start difference. First operand 5899 states and 6784 transitions. Second operand 5 states. [2019-10-13 18:06:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:01,148 INFO L93 Difference]: Finished difference Result 13172 states and 15172 transitions. [2019-10-13 18:06:01,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:06:01,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 550 [2019-10-13 18:06:01,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:01,176 INFO L225 Difference]: With dead ends: 13172 [2019-10-13 18:06:01,177 INFO L226 Difference]: Without dead ends: 7279 [2019-10-13 18:06:01,189 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 554 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:06:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7279 states. [2019-10-13 18:06:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7279 to 7261. [2019-10-13 18:06:01,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7261 states. [2019-10-13 18:06:01,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7261 states to 7261 states and 8075 transitions. [2019-10-13 18:06:01,353 INFO L78 Accepts]: Start accepts. Automaton has 7261 states and 8075 transitions. Word has length 550 [2019-10-13 18:06:01,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:01,362 INFO L462 AbstractCegarLoop]: Abstraction has 7261 states and 8075 transitions. [2019-10-13 18:06:01,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 7261 states and 8075 transitions. [2019-10-13 18:06:01,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2019-10-13 18:06:01,395 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:01,395 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:01,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:01,599 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:01,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:01,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1655123335, now seen corresponding path program 1 times [2019-10-13 18:06:01,601 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:01,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734755081] [2019-10-13 18:06:01,601 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:01,601 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:01,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 300 proven. 221 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2019-10-13 18:06:02,709 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734755081] [2019-10-13 18:06:02,709 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709820370] [2019-10-13 18:06:02,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:02,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:02,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 674 proven. 2 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2019-10-13 18:06:03,204 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:03,205 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:06:03,205 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549400443] [2019-10-13 18:06:03,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:06:03,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:03,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:06:03,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:03,207 INFO L87 Difference]: Start difference. First operand 7261 states and 8075 transitions. Second operand 11 states.