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_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:59:12,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:59:12,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:59:12,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:59:12,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:59:12,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:59:12,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:59:12,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:59:12,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:59:12,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:59:12,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:59:12,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:59:12,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:59:12,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:59:12,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:59:12,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:59:12,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:59:12,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:59:12,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:59:12,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:59:13,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:59:13,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:59:13,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:59:13,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:59:13,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:59:13,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:59:13,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:59:13,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:59:13,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:59:13,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:59:13,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:59:13,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:59:13,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:59:13,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:59:13,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:59:13,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:59:13,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:59:13,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:59:13,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:59:13,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:59:13,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:59:13,020 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 17:59:13,034 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:59:13,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:59:13,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:59:13,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:59:13,036 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:59:13,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:59:13,036 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:59:13,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:59:13,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:59:13,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:59:13,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:59:13,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:59:13,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:59:13,038 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:59:13,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:59:13,038 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:59:13,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:59:13,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:59:13,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:59:13,039 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:59:13,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:59:13,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:59:13,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:59:13,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:59:13,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:59:13,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:59:13,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:59:13,041 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:59:13,041 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:59:13,322 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:59:13,335 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:59:13,338 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:59:13,340 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:59:13,341 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:59:13,342 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label01.c [2019-10-13 17:59:13,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9826d3b9a/99b43a5ff2874d7a8018d0bea24550f0/FLAG9701bcfb6 [2019-10-13 17:59:14,022 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:59:14,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label01.c [2019-10-13 17:59:14,050 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9826d3b9a/99b43a5ff2874d7a8018d0bea24550f0/FLAG9701bcfb6 [2019-10-13 17:59:14,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9826d3b9a/99b43a5ff2874d7a8018d0bea24550f0 [2019-10-13 17:59:14,263 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:59:14,265 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:59:14,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:59:14,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:59:14,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:59:14,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:59:14" (1/1) ... [2019-10-13 17:59:14,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34930f52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:14, skipping insertion in model container [2019-10-13 17:59:14,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:59:14" (1/1) ... [2019-10-13 17:59:14,282 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:59:14,360 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:59:15,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:59:15,093 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:59:15,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:59:15,328 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:59:15,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:15 WrapperNode [2019-10-13 17:59:15,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:59:15,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:59:15,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:59:15,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:59:15,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:15" (1/1) ... [2019-10-13 17:59:15,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:15" (1/1) ... [2019-10-13 17:59:15,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:15" (1/1) ... [2019-10-13 17:59:15,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:15" (1/1) ... [2019-10-13 17:59:15,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:15" (1/1) ... [2019-10-13 17:59:15,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:15" (1/1) ... [2019-10-13 17:59:15,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:15" (1/1) ... [2019-10-13 17:59:15,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:59:15,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:59:15,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:59:15,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:59:15,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:15" (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 17:59:15,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:59:15,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:59:15,619 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:59:15,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:59:15,620 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:59:15,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:59:15,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:59:15,622 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:59:15,623 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:59:15,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:59:15,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:59:17,716 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:59:17,716 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:59:17,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:59:17 BoogieIcfgContainer [2019-10-13 17:59:17,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:59:17,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:59:17,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:59:17,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:59:17,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:59:14" (1/3) ... [2019-10-13 17:59:17,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64970ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:59:17, skipping insertion in model container [2019-10-13 17:59:17,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:15" (2/3) ... [2019-10-13 17:59:17,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64970ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:59:17, skipping insertion in model container [2019-10-13 17:59:17,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:59:17" (3/3) ... [2019-10-13 17:59:17,728 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label01.c [2019-10-13 17:59:17,737 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:59:17,747 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:59:17,759 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:59:17,788 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:59:17,788 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:59:17,788 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:59:17,789 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:59:17,789 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:59:17,789 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:59:17,789 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:59:17,789 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:59:17,816 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 17:59:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 17:59:17,826 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:17,827 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:17,829 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:17,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:17,836 INFO L82 PathProgramCache]: Analyzing trace with hash 155474906, now seen corresponding path program 1 times [2019-10-13 17:59:17,845 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:17,845 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057956182] [2019-10-13 17:59:17,846 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:17,846 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:17,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:18,363 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 17:59:18,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057956182] [2019-10-13 17:59:18,365 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:18,365 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:59:18,365 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421369358] [2019-10-13 17:59:18,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:59:18,371 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:18,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:59:18,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:59:18,388 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-13 17:59:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:21,725 INFO L93 Difference]: Finished difference Result 999 states and 1795 transitions. [2019-10-13 17:59:21,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:59:21,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-13 17:59:21,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:21,748 INFO L225 Difference]: With dead ends: 999 [2019-10-13 17:59:21,748 INFO L226 Difference]: Without dead ends: 639 [2019-10-13 17:59:21,758 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 17:59:21,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2019-10-13 17:59:21,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 621. [2019-10-13 17:59:21,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-10-13 17:59:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 956 transitions. [2019-10-13 17:59:21,859 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 956 transitions. Word has length 63 [2019-10-13 17:59:21,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:21,860 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 956 transitions. [2019-10-13 17:59:21,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:59:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 956 transitions. [2019-10-13 17:59:21,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 17:59:21,868 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:21,868 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, 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] [2019-10-13 17:59:21,869 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:21,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:21,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1591482302, now seen corresponding path program 1 times [2019-10-13 17:59:21,869 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:21,870 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671203196] [2019-10-13 17:59:21,870 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:21,870 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:21,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:22,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671203196] [2019-10-13 17:59:22,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036578491] [2019-10-13 17:59:22,277 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 17:59:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:22,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:59:22,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:22,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 17:59:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:22,584 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:59:22,584 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-10-13 17:59:22,585 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071698032] [2019-10-13 17:59:22,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:59:22,590 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:22,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:59:22,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:59:22,591 INFO L87 Difference]: Start difference. First operand 621 states and 956 transitions. Second operand 5 states. [2019-10-13 17:59:24,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:24,385 INFO L93 Difference]: Finished difference Result 1833 states and 2866 transitions. [2019-10-13 17:59:24,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:59:24,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2019-10-13 17:59:24,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:24,394 INFO L225 Difference]: With dead ends: 1833 [2019-10-13 17:59:24,395 INFO L226 Difference]: Without dead ends: 1218 [2019-10-13 17:59:24,398 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:59:24,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2019-10-13 17:59:24,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1009. [2019-10-13 17:59:24,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1009 states. [2019-10-13 17:59:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1374 transitions. [2019-10-13 17:59:24,484 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1374 transitions. Word has length 137 [2019-10-13 17:59:24,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:24,484 INFO L462 AbstractCegarLoop]: Abstraction has 1009 states and 1374 transitions. [2019-10-13 17:59:24,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:59:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1374 transitions. [2019-10-13 17:59:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-10-13 17:59:24,496 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:24,496 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:24,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:24,702 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:24,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:24,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1188297820, now seen corresponding path program 1 times [2019-10-13 17:59:24,703 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:24,703 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597173235] [2019-10-13 17:59:24,703 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:24,703 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:24,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 17:59:25,219 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597173235] [2019-10-13 17:59:25,219 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196475499] [2019-10-13 17:59:25,219 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 17:59:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:25,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:59:25,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:25,478 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,481 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,483 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,487 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,493 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,496 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:35,781 WARN L191 SmtUtils]: Spent 8.16 s on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2019-10-13 17:59:35,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 17:59:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 17:59:38,205 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:59:38,205 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-10-13 17:59:38,205 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688761172] [2019-10-13 17:59:38,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:59:38,208 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:38,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:59:38,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=62, Unknown=2, NotChecked=0, Total=90 [2019-10-13 17:59:38,209 INFO L87 Difference]: Start difference. First operand 1009 states and 1374 transitions. Second operand 10 states.