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_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:13,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:13,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:13,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:54:13,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:54:13,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:54:13,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:54:13,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:54:13,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:54:13,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:54:13,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:54:13,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:54:13,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:13,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:13,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:13,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:13,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:13,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:13,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:13,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:13,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:13,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:13,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:13,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:13,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:54:13,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:54:13,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:54:13,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:54:13,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:54:13,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:54:13,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:54:13,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:54:13,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:54:13,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:13,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:13,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:13,479 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 21:54:13,509 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:13,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:13,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:13,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:13,513 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:13,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:13,514 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:13,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:13,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:13,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:13,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:13,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:13,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:13,515 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:13,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:13,515 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:13,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:13,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:13,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:13,516 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:13,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:13,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:13,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:13,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:13,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:13,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:13,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:13,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:13,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:13,831 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:13,845 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:13,849 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:13,851 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:13,851 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:13,852 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label08.c [2019-10-14 21:54:13,913 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c4e7cd0e/ccc629309e0e48f8829c30ce051af6b9/FLAG7ff2a611d [2019-10-14 21:54:14,526 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:54:14,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label08.c [2019-10-14 21:54:14,546 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c4e7cd0e/ccc629309e0e48f8829c30ce051af6b9/FLAG7ff2a611d [2019-10-14 21:54:14,679 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c4e7cd0e/ccc629309e0e48f8829c30ce051af6b9 [2019-10-14 21:54:14,690 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:54:14,691 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:54:14,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:14,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:54:14,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:54:14,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:14" (1/1) ... [2019-10-14 21:54:14,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dba7643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:14, skipping insertion in model container [2019-10-14 21:54:14,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:14" (1/1) ... [2019-10-14 21:54:14,708 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:54:14,792 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:54:15,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:15,577 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:54:16,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:16,236 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:54:16,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:16 WrapperNode [2019-10-14 21:54:16,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:16,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:54:16,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:54:16,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:54:16,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:16" (1/1) ... [2019-10-14 21:54:16,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:16" (1/1) ... [2019-10-14 21:54:16,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:16" (1/1) ... [2019-10-14 21:54:16,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:16" (1/1) ... [2019-10-14 21:54:16,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:16" (1/1) ... [2019-10-14 21:54:16,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:16" (1/1) ... [2019-10-14 21:54:16,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:16" (1/1) ... [2019-10-14 21:54:16,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:54:16,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:54:16,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:54:16,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:54:16,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:16" (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 21:54:16,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:54:16,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:54:16,546 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:54:16,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:54:16,546 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:54:16,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:54:16,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:54:16,547 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:54:16,548 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:54:16,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:54:16,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:54:18,881 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:54:18,882 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:54:18,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:18 BoogieIcfgContainer [2019-10-14 21:54:18,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:54:18,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:54:18,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:54:18,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:54:18,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:54:14" (1/3) ... [2019-10-14 21:54:18,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10447de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:18, skipping insertion in model container [2019-10-14 21:54:18,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:16" (2/3) ... [2019-10-14 21:54:18,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10447de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:18, skipping insertion in model container [2019-10-14 21:54:18,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:18" (3/3) ... [2019-10-14 21:54:18,892 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label08.c [2019-10-14 21:54:18,903 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:54:18,911 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:54:18,925 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:54:18,956 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:54:18,956 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:54:18,957 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:54:18,957 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:54:18,957 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:54:18,957 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:54:18,957 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:54:18,957 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:54:18,984 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:54:18,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-14 21:54:19,000 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:19,001 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] [2019-10-14 21:54:19,003 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:19,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:19,009 INFO L82 PathProgramCache]: Analyzing trace with hash -116190352, now seen corresponding path program 1 times [2019-10-14 21:54:19,018 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:19,018 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263442784] [2019-10-14 21:54:19,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:19,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:19,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:19,925 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:20,087 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 21:54:20,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263442784] [2019-10-14 21:54:20,089 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:20,089 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:54:20,090 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14559681] [2019-10-14 21:54:20,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:20,096 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:20,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:20,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:20,114 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:54:20,383 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:23,521 INFO L93 Difference]: Finished difference Result 845 states and 1493 transitions. [2019-10-14 21:54:23,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:54:23,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2019-10-14 21:54:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:23,547 INFO L225 Difference]: With dead ends: 845 [2019-10-14 21:54:23,548 INFO L226 Difference]: Without dead ends: 470 [2019-10-14 21:54:23,555 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:54:23,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-10-14 21:54:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 464. [2019-10-14 21:54:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2019-10-14 21:54:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 743 transitions. [2019-10-14 21:54:23,637 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 743 transitions. Word has length 163 [2019-10-14 21:54:23,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:23,638 INFO L462 AbstractCegarLoop]: Abstraction has 464 states and 743 transitions. [2019-10-14 21:54:23,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 743 transitions. [2019-10-14 21:54:23,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-14 21:54:23,653 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:23,653 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] [2019-10-14 21:54:23,653 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:23,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:23,654 INFO L82 PathProgramCache]: Analyzing trace with hash 616853235, now seen corresponding path program 1 times [2019-10-14 21:54:23,657 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:23,658 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218031967] [2019-10-14 21:54:23,658 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:23,658 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:23,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:24,022 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:24,187 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 21:54:24,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218031967] [2019-10-14 21:54:24,187 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:24,188 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:54:24,188 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746377361] [2019-10-14 21:54:24,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:54:24,190 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:24,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:54:24,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:24,191 INFO L87 Difference]: Start difference. First operand 464 states and 743 transitions. Second operand 8 states. [2019-10-14 21:54:24,351 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:27,331 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 21:54:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:28,019 INFO L93 Difference]: Finished difference Result 1407 states and 2333 transitions. [2019-10-14 21:54:28,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:54:28,019 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 172 [2019-10-14 21:54:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:28,028 INFO L225 Difference]: With dead ends: 1407 [2019-10-14 21:54:28,029 INFO L226 Difference]: Without dead ends: 949 [2019-10-14 21:54:28,031 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 21:54:28,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2019-10-14 21:54:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 905. [2019-10-14 21:54:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2019-10-14 21:54:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1437 transitions. [2019-10-14 21:54:28,094 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1437 transitions. Word has length 172 [2019-10-14 21:54:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:28,095 INFO L462 AbstractCegarLoop]: Abstraction has 905 states and 1437 transitions. [2019-10-14 21:54:28,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:54:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1437 transitions. [2019-10-14 21:54:28,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-14 21:54:28,099 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:28,100 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] [2019-10-14 21:54:28,100 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:28,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:28,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1596545668, now seen corresponding path program 1 times [2019-10-14 21:54:28,101 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:28,101 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941510086] [2019-10-14 21:54:28,101 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:28,101 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:28,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:28,412 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:28,568 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 21:54:28,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941510086] [2019-10-14 21:54:28,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186079085] [2019-10-14 21:54:28,573 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 21:54:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:28,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:54:28,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:28,868 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 21:54:28,869 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:28,869 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-10-14 21:54:28,870 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637401233] [2019-10-14 21:54:28,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:28,871 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:28,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:28,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:28,872 INFO L87 Difference]: Start difference. First operand 905 states and 1437 transitions. Second operand 5 states. [2019-10-14 21:54:30,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:30,545 INFO L93 Difference]: Finished difference Result 2749 states and 4502 transitions. [2019-10-14 21:54:30,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:30,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 175 [2019-10-14 21:54:30,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:30,560 INFO L225 Difference]: With dead ends: 2749 [2019-10-14 21:54:30,560 INFO L226 Difference]: Without dead ends: 1850 [2019-10-14 21:54:30,564 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:30,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2019-10-14 21:54:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1816. [2019-10-14 21:54:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2019-10-14 21:54:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2879 transitions. [2019-10-14 21:54:30,638 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2879 transitions. Word has length 175 [2019-10-14 21:54:30,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:30,638 INFO L462 AbstractCegarLoop]: Abstraction has 1816 states and 2879 transitions. [2019-10-14 21:54:30,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:30,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2879 transitions. [2019-10-14 21:54:30,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-14 21:54:30,645 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:30,646 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:54:30,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:30,853 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:30,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:30,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1022501435, now seen corresponding path program 1 times [2019-10-14 21:54:30,853 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:30,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281391279] [2019-10-14 21:54:30,854 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:30,854 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:30,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:31,114 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:31,273 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:54:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:31,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281391279] [2019-10-14 21:54:31,384 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:31,384 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:54:31,384 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648066702] [2019-10-14 21:54:31,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:54:31,386 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:31,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:54:31,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:31,386 INFO L87 Difference]: Start difference. First operand 1816 states and 2879 transitions. Second operand 9 states. [2019-10-14 21:54:31,726 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:32,114 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:32,508 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:35,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:35,875 INFO L93 Difference]: Finished difference Result 7017 states and 12004 transitions. [2019-10-14 21:54:35,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:54:35,877 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 176 [2019-10-14 21:54:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:35,918 INFO L225 Difference]: With dead ends: 7017 [2019-10-14 21:54:35,919 INFO L226 Difference]: Without dead ends: 5207 [2019-10-14 21:54:35,928 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:54:35,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5207 states. [2019-10-14 21:54:36,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5207 to 5139. [2019-10-14 21:54:36,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5139 states. [2019-10-14 21:54:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5139 states to 5139 states and 7981 transitions. [2019-10-14 21:54:36,139 INFO L78 Accepts]: Start accepts. Automaton has 5139 states and 7981 transitions. Word has length 176 [2019-10-14 21:54:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:36,140 INFO L462 AbstractCegarLoop]: Abstraction has 5139 states and 7981 transitions. [2019-10-14 21:54:36,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:54:36,140 INFO L276 IsEmpty]: Start isEmpty. Operand 5139 states and 7981 transitions. [2019-10-14 21:54:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-14 21:54:36,159 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:36,160 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:54:36,160 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:36,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:36,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1080229528, now seen corresponding path program 1 times [2019-10-14 21:54:36,161 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:36,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60472620] [2019-10-14 21:54:36,161 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:36,161 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:36,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:36,535 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:36,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60472620] [2019-10-14 21:54:36,743 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426583683] [2019-10-14 21:54:36,743 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 21:54:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:36,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:54:36,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:37,151 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:37,151 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:54:37,152 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588901508] [2019-10-14 21:54:37,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:37,153 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:37,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:37,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:54:37,155 INFO L87 Difference]: Start difference. First operand 5139 states and 7981 transitions. Second operand 3 states. [2019-10-14 21:54:38,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:38,293 INFO L93 Difference]: Finished difference Result 15237 states and 24333 transitions. [2019-10-14 21:54:38,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:54:38,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 177 [2019-10-14 21:54:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:38,350 INFO L225 Difference]: With dead ends: 15237 [2019-10-14 21:54:38,351 INFO L226 Difference]: Without dead ends: 10104 [2019-10-14 21:54:38,369 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:54:38,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10104 states. [2019-10-14 21:54:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10104 to 10102. [2019-10-14 21:54:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10102 states. [2019-10-14 21:54:38,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10102 states to 10102 states and 15469 transitions. [2019-10-14 21:54:38,724 INFO L78 Accepts]: Start accepts. Automaton has 10102 states and 15469 transitions. Word has length 177 [2019-10-14 21:54:38,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:38,729 INFO L462 AbstractCegarLoop]: Abstraction has 10102 states and 15469 transitions. [2019-10-14 21:54:38,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:54:38,729 INFO L276 IsEmpty]: Start isEmpty. Operand 10102 states and 15469 transitions. [2019-10-14 21:54:38,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-14 21:54:38,759 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:38,759 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:38,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:38,965 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:38,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:38,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1143772981, now seen corresponding path program 1 times [2019-10-14 21:54:38,975 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:38,975 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945584321] [2019-10-14 21:54:38,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:38,976 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:38,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:39,302 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:39,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945584321] [2019-10-14 21:54:39,521 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938216498] [2019-10-14 21:54:39,521 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 21:54:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:39,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:54:39,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:39,870 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:39,870 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-14 21:54:39,871 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728838865] [2019-10-14 21:54:39,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:39,871 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:39,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:39,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:39,872 INFO L87 Difference]: Start difference. First operand 10102 states and 15469 transitions. Second operand 3 states. [2019-10-14 21:54:41,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:41,128 INFO L93 Difference]: Finished difference Result 29302 states and 45756 transitions. [2019-10-14 21:54:41,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:54:41,129 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 184 [2019-10-14 21:54:41,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:41,222 INFO L225 Difference]: With dead ends: 29302 [2019-10-14 21:54:41,223 INFO L226 Difference]: Without dead ends: 19206 [2019-10-14 21:54:41,271 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:41,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19206 states. [2019-10-14 21:54:42,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19206 to 19153. [2019-10-14 21:54:42,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19153 states. [2019-10-14 21:54:42,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19153 states to 19153 states and 29191 transitions. [2019-10-14 21:54:42,215 INFO L78 Accepts]: Start accepts. Automaton has 19153 states and 29191 transitions. Word has length 184 [2019-10-14 21:54:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:42,215 INFO L462 AbstractCegarLoop]: Abstraction has 19153 states and 29191 transitions. [2019-10-14 21:54:42,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:54:42,216 INFO L276 IsEmpty]: Start isEmpty. Operand 19153 states and 29191 transitions. [2019-10-14 21:54:42,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-10-14 21:54:42,275 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:42,275 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] [2019-10-14 21:54:42,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:42,489 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:42,490 INFO L82 PathProgramCache]: Analyzing trace with hash 518791560, now seen corresponding path program 1 times [2019-10-14 21:54:42,490 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:42,491 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063669839] [2019-10-14 21:54:42,492 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:42,492 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:42,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,707 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,893 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 21:54:42,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063669839] [2019-10-14 21:54:42,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899215089] [2019-10-14 21:54:42,894 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 21:54:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:43,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:54:43,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:43,161 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 21:54:43,161 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:43,162 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 21:54:43,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365206738] [2019-10-14 21:54:43,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:43,163 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:43,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:43,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:43,164 INFO L87 Difference]: Start difference. First operand 19153 states and 29191 transitions. Second operand 3 states. [2019-10-14 21:54:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:44,481 INFO L93 Difference]: Finished difference Result 38304 states and 58394 transitions. [2019-10-14 21:54:44,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:54:44,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 201 [2019-10-14 21:54:44,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:44,580 INFO L225 Difference]: With dead ends: 38304 [2019-10-14 21:54:44,580 INFO L226 Difference]: Without dead ends: 19157 [2019-10-14 21:54:45,430 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:45,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19157 states. [2019-10-14 21:54:45,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19157 to 19153. [2019-10-14 21:54:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19153 states. [2019-10-14 21:54:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19153 states to 19153 states and 28551 transitions. [2019-10-14 21:54:45,871 INFO L78 Accepts]: Start accepts. Automaton has 19153 states and 28551 transitions. Word has length 201 [2019-10-14 21:54:45,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:45,872 INFO L462 AbstractCegarLoop]: Abstraction has 19153 states and 28551 transitions. [2019-10-14 21:54:45,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:54:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 19153 states and 28551 transitions. [2019-10-14 21:54:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-14 21:54:45,932 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:45,932 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:46,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:46,138 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:46,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:46,138 INFO L82 PathProgramCache]: Analyzing trace with hash -117913030, now seen corresponding path program 1 times [2019-10-14 21:54:46,138 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:46,139 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226307899] [2019-10-14 21:54:46,139 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:46,139 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:46,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:46,342 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:54:46,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226307899]