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/Problem18_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:07:28,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:07:28,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:07:28,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:07:28,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:07:28,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:07:28,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:07:28,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:07:28,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:07:28,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:07:28,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:07:28,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:07:28,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:07:28,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:07:28,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:07:28,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:07:28,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:07:28,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:07:28,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:07:28,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:07:28,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:07:28,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:07:28,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:07:28,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:07:28,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 18:07:28,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 18:07:28,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 18:07:28,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 18:07:28,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 18:07:28,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 18:07:28,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:07:28,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:07:28,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:07:28,247 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:07:28,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:07:28,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:07:28,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:07:28,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:07:28,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:07:28,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:07:28,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:07:28,255 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 18:07:28,275 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:07:28,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:07:28,278 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:07:28,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:07:28,279 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:07:28,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:07:28,279 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:07:28,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:07:28,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:07:28,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:07:28,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:07:28,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:07:28,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:07:28,282 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:07:28,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:07:28,282 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:07:28,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:07:28,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:07:28,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:07:28,283 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:07:28,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:07:28,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:07:28,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:07:28,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:07:28,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:07:28,284 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:07:28,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:07:28,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:07:28,285 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:07:28,572 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:07:28,595 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:07:28,599 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:07:28,601 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:07:28,601 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:07:28,602 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label56.c [2019-10-13 18:07:28,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e35eacb0/2ae15af9253e4536a2aa3833e122028d/FLAG4ae39a4fd [2019-10-13 18:07:29,436 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:07:29,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label56.c [2019-10-13 18:07:29,465 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e35eacb0/2ae15af9253e4536a2aa3833e122028d/FLAG4ae39a4fd [2019-10-13 18:07:29,553 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e35eacb0/2ae15af9253e4536a2aa3833e122028d [2019-10-13 18:07:29,566 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:07:29,568 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:07:29,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:07:29,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:07:29,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:07:29,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:07:29" (1/1) ... [2019-10-13 18:07:29,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653cba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:07:29, skipping insertion in model container [2019-10-13 18:07:29,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:07:29" (1/1) ... [2019-10-13 18:07:29,589 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:07:29,708 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:07:31,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:07:31,047 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:07:31,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:07:31,554 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:07:31,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:07:31 WrapperNode [2019-10-13 18:07:31,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:07:31,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:07:31,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:07:31,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:07:31,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:07:31" (1/1) ... [2019-10-13 18:07:31,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:07:31" (1/1) ... [2019-10-13 18:07:31,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:07:31" (1/1) ... [2019-10-13 18:07:31,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:07:31" (1/1) ... [2019-10-13 18:07:31,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:07:31" (1/1) ... [2019-10-13 18:07:31,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:07:31" (1/1) ... [2019-10-13 18:07:31,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:07:31" (1/1) ... [2019-10-13 18:07:31,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:07:31,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:07:31,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:07:31,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:07:31,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:07:31" (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 18:07:31,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:07:31,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:07:31,895 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:07:31,895 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:07:31,895 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 18:07:31,895 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:07:31,895 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:07:31,896 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:07:31,896 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 18:07:31,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:07:31,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:07:31,896 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:07:31,897 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:07:31,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:07:31,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:07:36,287 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:07:36,288 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:07:36,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:07:36 BoogieIcfgContainer [2019-10-13 18:07:36,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:07:36,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:07:36,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:07:36,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:07:36,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:07:29" (1/3) ... [2019-10-13 18:07:36,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ecfb25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:07:36, skipping insertion in model container [2019-10-13 18:07:36,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:07:31" (2/3) ... [2019-10-13 18:07:36,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ecfb25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:07:36, skipping insertion in model container [2019-10-13 18:07:36,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:07:36" (3/3) ... [2019-10-13 18:07:36,302 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label56.c [2019-10-13 18:07:36,317 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:07:36,330 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:07:36,343 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:07:36,386 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:07:36,387 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:07:36,387 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:07:36,387 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:07:36,387 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:07:36,387 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:07:36,387 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:07:36,388 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:07:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 18:07:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 18:07:36,447 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:07:36,448 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, 1, 1] [2019-10-13 18:07:36,451 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:07:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:07:36,457 INFO L82 PathProgramCache]: Analyzing trace with hash -447969511, now seen corresponding path program 1 times [2019-10-13 18:07:36,466 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:07:36,467 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341086441] [2019-10-13 18:07:36,467 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:36,467 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:36,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:07:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:36,968 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 18:07:36,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341086441] [2019-10-13 18:07:36,970 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:07:36,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:07:36,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937841999] [2019-10-13 18:07:36,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:07:36,976 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:07:36,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:07:36,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:07:36,994 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-10-13 18:07:49,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:07:49,782 INFO L93 Difference]: Finished difference Result 3000 states and 5782 transitions. [2019-10-13 18:07:49,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:07:49,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2019-10-13 18:07:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:07:49,822 INFO L225 Difference]: With dead ends: 3000 [2019-10-13 18:07:49,822 INFO L226 Difference]: Without dead ends: 2142 [2019-10-13 18:07:49,833 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 [2019-10-13 18:07:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-10-13 18:07:50,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2138. [2019-10-13 18:07:50,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2138 states. [2019-10-13 18:07:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3501 transitions. [2019-10-13 18:07:50,074 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3501 transitions. Word has length 54 [2019-10-13 18:07:50,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:07:50,075 INFO L462 AbstractCegarLoop]: Abstraction has 2138 states and 3501 transitions. [2019-10-13 18:07:50,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:07:50,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3501 transitions. [2019-10-13 18:07:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 18:07:50,082 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:07:50,082 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:07:50,083 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:07:50,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:07:50,083 INFO L82 PathProgramCache]: Analyzing trace with hash -970247243, now seen corresponding path program 1 times [2019-10-13 18:07:50,083 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:07:50,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034792270] [2019-10-13 18:07:50,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:50,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:50,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:07:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:07:50,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034792270] [2019-10-13 18:07:50,355 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:07:50,356 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:07:50,356 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596893672] [2019-10-13 18:07:50,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:07:50,358 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:07:50,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:07:50,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:07:50,359 INFO L87 Difference]: Start difference. First operand 2138 states and 3501 transitions. Second operand 8 states. [2019-10-13 18:08:03,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:08:03,860 INFO L93 Difference]: Finished difference Result 8664 states and 14432 transitions. [2019-10-13 18:08:03,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:08:03,861 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2019-10-13 18:08:03,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:08:03,902 INFO L225 Difference]: With dead ends: 8664 [2019-10-13 18:08:03,902 INFO L226 Difference]: Without dead ends: 6532 [2019-10-13 18:08:03,910 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:08:03,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6532 states. [2019-10-13 18:08:04,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6532 to 6511. [2019-10-13 18:08:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6511 states. [2019-10-13 18:08:04,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6511 states to 6511 states and 9250 transitions. [2019-10-13 18:08:04,130 INFO L78 Accepts]: Start accepts. Automaton has 6511 states and 9250 transitions. Word has length 123 [2019-10-13 18:08:04,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:08:04,133 INFO L462 AbstractCegarLoop]: Abstraction has 6511 states and 9250 transitions. [2019-10-13 18:08:04,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:08:04,134 INFO L276 IsEmpty]: Start isEmpty. Operand 6511 states and 9250 transitions. [2019-10-13 18:08:04,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2019-10-13 18:08:04,148 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:08:04,148 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:04,149 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:08:04,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:08:04,150 INFO L82 PathProgramCache]: Analyzing trace with hash 382381011, now seen corresponding path program 1 times [2019-10-13 18:08:04,150 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:08:04,151 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787415023] [2019-10-13 18:08:04,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:08:04,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:08:04,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:08:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:08:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:08:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:08:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:08:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:08:04,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787415023] [2019-10-13 18:08:04,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360902704] [2019-10-13 18:08:04,659 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 18:08:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:08:04,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:08:04,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:08:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:08:05,024 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:08:05,025 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:08:05,025 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466946909] [2019-10-13 18:08:05,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:08:05,028 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:08:05,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:08:05,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:08:05,030 INFO L87 Difference]: Start difference. First operand 6511 states and 9250 transitions. Second operand 11 states.