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/Problem03_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:24,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:24,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:24,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:54:24,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:54:24,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:54:24,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:54:24,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:54:24,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:54:24,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:54:24,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:54:24,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:54:24,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:24,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:24,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:24,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:24,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:24,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:24,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:24,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:24,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:24,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:24,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:24,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:24,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:54:24,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:54:24,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:54:24,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:54:24,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:54:24,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:54:24,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:54:24,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:54:24,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:54:24,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:24,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:24,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:24,071 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:54:24,085 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:24,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:24,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:24,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:24,087 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:24,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:24,088 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:24,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:24,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:24,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:24,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:24,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:24,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:24,089 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:24,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:24,089 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:24,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:24,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:24,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:24,090 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:24,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:24,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:24,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:24,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:24,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:24,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:24,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:24,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:24,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:24,370 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:24,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:24,391 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:24,392 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:24,393 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:24,394 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label29.c [2019-10-14 21:54:24,490 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3662246d/35cc619b9ce54fe98235d44b44631e91/FLAG6dc99839d [2019-10-14 21:54:25,168 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:54:25,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label29.c [2019-10-14 21:54:25,186 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3662246d/35cc619b9ce54fe98235d44b44631e91/FLAG6dc99839d [2019-10-14 21:54:25,343 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3662246d/35cc619b9ce54fe98235d44b44631e91 [2019-10-14 21:54:25,355 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:54:25,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:54:25,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:25,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:54:25,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:54:25,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:25" (1/1) ... [2019-10-14 21:54:25,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c679016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:25, skipping insertion in model container [2019-10-14 21:54:25,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:25" (1/1) ... [2019-10-14 21:54:25,377 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:54:25,469 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:54:26,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:26,360 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:54:26,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:26,798 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:54:26,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:26 WrapperNode [2019-10-14 21:54:26,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:26,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:54:26,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:54:26,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:54:26,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:26" (1/1) ... [2019-10-14 21:54:26,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:26" (1/1) ... [2019-10-14 21:54:26,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:26" (1/1) ... [2019-10-14 21:54:26,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:26" (1/1) ... [2019-10-14 21:54:26,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:26" (1/1) ... [2019-10-14 21:54:26,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:26" (1/1) ... [2019-10-14 21:54:26,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:26" (1/1) ... [2019-10-14 21:54:26,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:54:26,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:54:26,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:54:26,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:54:27,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:27,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:54:27,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:54:27,066 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:54:27,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:54:27,067 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:54:27,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:54:27,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:54:27,067 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:54:27,068 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:54:27,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:54:27,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:54:28,989 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:54:28,990 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:54:28,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:28 BoogieIcfgContainer [2019-10-14 21:54:28,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:54:28,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:54:28,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:54:28,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:54:28,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:54:25" (1/3) ... [2019-10-14 21:54:28,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370aa82f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:28, skipping insertion in model container [2019-10-14 21:54:28,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:26" (2/3) ... [2019-10-14 21:54:28,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370aa82f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:28, skipping insertion in model container [2019-10-14 21:54:28,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:28" (3/3) ... [2019-10-14 21:54:29,001 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label29.c [2019-10-14 21:54:29,014 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:54:29,025 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:54:29,043 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:54:29,077 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:54:29,078 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:54:29,078 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:54:29,078 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:54:29,078 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:54:29,079 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:54:29,079 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:54:29,079 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:54:29,113 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:54:29,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-14 21:54:29,133 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:29,134 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:29,137 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:29,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:29,144 INFO L82 PathProgramCache]: Analyzing trace with hash -30261395, now seen corresponding path program 1 times [2019-10-14 21:54:29,155 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:29,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095403927] [2019-10-14 21:54:29,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:29,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:29,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:30,145 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:30,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095403927] [2019-10-14 21:54:30,295 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:30,295 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:54:30,296 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361748239] [2019-10-14 21:54:30,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:30,302 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:30,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:30,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:30,315 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:54:30,515 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:33,548 INFO L93 Difference]: Finished difference Result 845 states and 1493 transitions. [2019-10-14 21:54:33,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:54:33,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 184 [2019-10-14 21:54:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:33,571 INFO L225 Difference]: With dead ends: 845 [2019-10-14 21:54:33,571 INFO L226 Difference]: Without dead ends: 470 [2019-10-14 21:54:33,580 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:54:33,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-10-14 21:54:33,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 464. [2019-10-14 21:54:33,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2019-10-14 21:54:33,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 743 transitions. [2019-10-14 21:54:33,680 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 743 transitions. Word has length 184 [2019-10-14 21:54:33,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:33,681 INFO L462 AbstractCegarLoop]: Abstraction has 464 states and 743 transitions. [2019-10-14 21:54:33,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 743 transitions. [2019-10-14 21:54:33,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-14 21:54:33,689 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:33,690 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:33,694 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:33,695 INFO L82 PathProgramCache]: Analyzing trace with hash 451298250, now seen corresponding path program 1 times [2019-10-14 21:54:33,695 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:33,696 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85360587] [2019-10-14 21:54:33,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:33,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:33,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:33,959 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:34,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85360587] [2019-10-14 21:54:34,136 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:34,137 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:54:34,137 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120718832] [2019-10-14 21:54:34,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:54:34,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:34,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:54:34,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:34,145 INFO L87 Difference]: Start difference. First operand 464 states and 743 transitions. Second operand 8 states. [2019-10-14 21:54:34,308 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:37,136 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 21:54:37,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:37,739 INFO L93 Difference]: Finished difference Result 1407 states and 2333 transitions. [2019-10-14 21:54:37,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:54:37,740 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 193 [2019-10-14 21:54:37,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:37,753 INFO L225 Difference]: With dead ends: 1407 [2019-10-14 21:54:37,754 INFO L226 Difference]: Without dead ends: 949 [2019-10-14 21:54:37,757 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:54:37,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2019-10-14 21:54:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 905. [2019-10-14 21:54:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2019-10-14 21:54:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1437 transitions. [2019-10-14 21:54:37,846 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1437 transitions. Word has length 193 [2019-10-14 21:54:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:37,849 INFO L462 AbstractCegarLoop]: Abstraction has 905 states and 1437 transitions. [2019-10-14 21:54:37,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:54:37,850 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1437 transitions. [2019-10-14 21:54:37,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-14 21:54:37,863 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:37,864 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:37,865 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:37,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:37,865 INFO L82 PathProgramCache]: Analyzing trace with hash -82776871, now seen corresponding path program 1 times [2019-10-14 21:54:37,866 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:37,866 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124058439] [2019-10-14 21:54:37,866 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:37,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:37,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:38,351 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:38,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124058439] [2019-10-14 21:54:38,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863195383] [2019-10-14 21:54:38,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:38,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:54:38,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:38,951 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:38,952 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2019-10-14 21:54:38,952 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733791472] [2019-10-14 21:54:38,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:38,953 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:38,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:38,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:54:38,954 INFO L87 Difference]: Start difference. First operand 905 states and 1437 transitions. Second operand 5 states. [2019-10-14 21:54:40,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:40,471 INFO L93 Difference]: Finished difference Result 2749 states and 4502 transitions. [2019-10-14 21:54:40,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:40,472 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 196 [2019-10-14 21:54:40,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:40,484 INFO L225 Difference]: With dead ends: 2749 [2019-10-14 21:54:40,485 INFO L226 Difference]: Without dead ends: 1850 [2019-10-14 21:54:40,488 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:54:40,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2019-10-14 21:54:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1816. [2019-10-14 21:54:40,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2019-10-14 21:54:40,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2877 transitions. [2019-10-14 21:54:40,553 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2877 transitions. Word has length 196 [2019-10-14 21:54:40,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:40,554 INFO L462 AbstractCegarLoop]: Abstraction has 1816 states and 2877 transitions. [2019-10-14 21:54:40,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:40,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2877 transitions. [2019-10-14 21:54:40,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-14 21:54:40,561 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:40,561 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:40,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:40,772 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:40,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:40,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1936411885, now seen corresponding path program 1 times [2019-10-14 21:54:40,774 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:40,774 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222163671] [2019-10-14 21:54:40,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:40,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:40,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:41,001 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:54:41,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222163671] [2019-10-14 21:54:41,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576098111] [2019-10-14 21:54:41,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:41,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:54:41,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:54:41,780 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:41,780 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-14 21:54:41,781 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143548536] [2019-10-14 21:54:41,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:41,782 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:41,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:41,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:41,782 INFO L87 Difference]: Start difference. First operand 1816 states and 2877 transitions. Second operand 5 states. [2019-10-14 21:54:43,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:43,171 INFO L93 Difference]: Finished difference Result 5485 states and 9340 transitions. [2019-10-14 21:54:43,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:54:43,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 203 [2019-10-14 21:54:43,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:43,199 INFO L225 Difference]: With dead ends: 5485 [2019-10-14 21:54:43,200 INFO L226 Difference]: Without dead ends: 3675 [2019-10-14 21:54:43,206 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:54:43,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2019-10-14 21:54:43,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3599. [2019-10-14 21:54:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3599 states. [2019-10-14 21:54:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 5610 transitions. [2019-10-14 21:54:43,354 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 5610 transitions. Word has length 203 [2019-10-14 21:54:43,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:43,354 INFO L462 AbstractCegarLoop]: Abstraction has 3599 states and 5610 transitions. [2019-10-14 21:54:43,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:43,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 5610 transitions. [2019-10-14 21:54:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-14 21:54:43,370 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:43,370 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:43,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:43,575 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:43,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1189283813, now seen corresponding path program 1 times [2019-10-14 21:54:43,576 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:43,577 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218596073] [2019-10-14 21:54:43,577 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:43,577 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:43,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:43,776 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:43,974 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:54:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:54:44,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218596073] [2019-10-14 21:54:44,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378962741] [2019-10-14 21:54:44,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:44,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:54:44,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:54:44,426 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:54:44,426 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:54:44,426 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113889858] [2019-10-14 21:54:44,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:54:44,428 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:44,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:54:44,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:44,428 INFO L87 Difference]: Start difference. First operand 3599 states and 5610 transitions. Second operand 11 states. [2019-10-14 21:54:44,605 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:44,954 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:45,369 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:45,702 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-10-14 21:54:48,062 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:56,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:56,244 INFO L93 Difference]: Finished difference Result 15053 states and 30169 transitions. [2019-10-14 21:54:56,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-14 21:54:56,245 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 214 [2019-10-14 21:54:56,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:56,352 INFO L225 Difference]: With dead ends: 15053 [2019-10-14 21:54:56,353 INFO L226 Difference]: Without dead ends: 11460 [2019-10-14 21:54:56,374 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=375, Invalid=1431, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 21:54:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11460 states. [2019-10-14 21:54:57,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11460 to 11174. [2019-10-14 21:54:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11174 states. [2019-10-14 21:54:57,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11174 states to 11174 states and 18327 transitions. [2019-10-14 21:54:57,058 INFO L78 Accepts]: Start accepts. Automaton has 11174 states and 18327 transitions. Word has length 214 [2019-10-14 21:54:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:57,062 INFO L462 AbstractCegarLoop]: Abstraction has 11174 states and 18327 transitions. [2019-10-14 21:54:57,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:54:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 11174 states and 18327 transitions. [2019-10-14 21:54:57,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-14 21:54:57,149 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:57,149 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:57,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:57,355 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:57,356 INFO L82 PathProgramCache]: Analyzing trace with hash 381120597, now seen corresponding path program 1 times [2019-10-14 21:54:57,356 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:57,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982052500] [2019-10-14 21:54:57,358 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:57,358 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:57,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:57,577 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:54:57,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982052500] [2019-10-14 21:54:57,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250200476] [2019-10-14 21:54:57,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:58,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:54:58,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:54:58,209 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:58,210 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 21:54:58,210 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602884271] [2019-10-14 21:54:58,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:58,211 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:58,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:58,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:58,212 INFO L87 Difference]: Start difference. First operand 11174 states and 18327 transitions. Second operand 3 states. [2019-10-14 21:54:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:59,669 INFO L93 Difference]: Finished difference Result 32354 states and 54932 transitions. [2019-10-14 21:54:59,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:54:59,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 222 [2019-10-14 21:54:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:59,867 INFO L225 Difference]: With dead ends: 32354 [2019-10-14 21:54:59,867 INFO L226 Difference]: Without dead ends: 21186 [2019-10-14 21:54:59,935 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:59,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21186 states.