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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:58,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:58,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:58,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:54:58,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:54:58,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:54:58,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:54:58,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:54:58,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:54:58,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:54:58,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:54:58,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:54:58,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:58,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:58,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:58,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:58,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:58,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:58,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:58,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:58,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:58,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:58,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:58,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:58,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:54:58,325 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:54:58,325 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:54:58,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:54:58,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:54:58,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:54:58,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:54:58,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:54:58,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:54:58,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:54:58,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:54:58,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:54:58,339 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:54:58,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:54:58,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:58,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:58,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:58,345 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 21:54:58,367 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:58,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:58,370 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:58,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:58,370 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:58,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:58,371 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:58,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:58,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:58,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:58,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:58,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:58,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:58,373 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:58,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:58,374 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:58,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:58,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:58,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:58,375 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:58,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:58,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:58,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:58,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:58,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:58,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:58,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:58,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:58,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:58,684 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:58,703 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:58,706 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:58,708 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:58,708 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:58,709 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label54.c [2019-10-14 21:54:58,781 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a903bf70/20c7cd0296ed4e86afcd44c92eb2a5f1/FLAG0aae37556 [2019-10-14 21:54:59,483 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:54:59,484 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label54.c [2019-10-14 21:54:59,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a903bf70/20c7cd0296ed4e86afcd44c92eb2a5f1/FLAG0aae37556 [2019-10-14 21:54:59,602 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a903bf70/20c7cd0296ed4e86afcd44c92eb2a5f1 [2019-10-14 21:54:59,613 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:54:59,615 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:54:59,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:59,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:54:59,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:54:59,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:59" (1/1) ... [2019-10-14 21:54:59,627 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 09:54:59, skipping insertion in model container [2019-10-14 21:54:59,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:59" (1/1) ... [2019-10-14 21:54:59,637 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:54:59,719 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:55:00,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:55:00,682 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:55:01,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:55:01,039 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:55:01,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01 WrapperNode [2019-10-14 21:55:01,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:55:01,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:55:01,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:55:01,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:55:01,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (1/1) ... [2019-10-14 21:55:01,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (1/1) ... [2019-10-14 21:55:01,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (1/1) ... [2019-10-14 21:55:01,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (1/1) ... [2019-10-14 21:55:01,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (1/1) ... [2019-10-14 21:55:01,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (1/1) ... [2019-10-14 21:55:01,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (1/1) ... [2019-10-14 21:55:01,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:55:01,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:55:01,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:55:01,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:55:01,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (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 21:55:01,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:55:01,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:55:01,309 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:55:01,309 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:55:01,309 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:55:01,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:55:01,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:55:01,310 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:55:01,310 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:55:01,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:55:01,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:55:03,434 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:55:03,436 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:55:03,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:55:03 BoogieIcfgContainer [2019-10-14 21:55:03,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:55:03,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:55:03,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:55:03,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:55:03,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:54:59" (1/3) ... [2019-10-14 21:55:03,449 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 09:55:03, skipping insertion in model container [2019-10-14 21:55:03,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:01" (2/3) ... [2019-10-14 21:55:03,451 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 09:55:03, skipping insertion in model container [2019-10-14 21:55:03,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:55:03" (3/3) ... [2019-10-14 21:55:03,462 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label54.c [2019-10-14 21:55:03,476 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:55:03,485 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:55:03,498 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:55:03,538 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:55:03,538 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:55:03,538 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:55:03,538 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:55:03,539 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:55:03,539 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:55:03,539 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:55:03,539 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:55:03,573 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:55:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-14 21:55:03,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:03,595 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] [2019-10-14 21:55:03,597 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:03,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:03,604 INFO L82 PathProgramCache]: Analyzing trace with hash -629671171, now seen corresponding path program 1 times [2019-10-14 21:55:03,613 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:03,613 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095403927] [2019-10-14 21:55:03,614 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:03,614 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:03,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:04,514 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:04,644 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 21:55:04,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095403927] [2019-10-14 21:55:04,645 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:04,646 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:55:04,646 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361748239] [2019-10-14 21:55:04,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:55:04,653 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:04,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:55:04,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:55:04,671 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:55:04,887 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:05,466 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:55:09,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:09,361 INFO L93 Difference]: Finished difference Result 1107 states and 1968 transitions. [2019-10-14 21:55:09,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:55:09,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 172 [2019-10-14 21:55:09,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:09,384 INFO L225 Difference]: With dead ends: 1107 [2019-10-14 21:55:09,384 INFO L226 Difference]: Without dead ends: 699 [2019-10-14 21:55:09,393 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:55:09,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2019-10-14 21:55:09,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 474. [2019-10-14 21:55:09,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2019-10-14 21:55:09,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 720 transitions. [2019-10-14 21:55:09,483 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 720 transitions. Word has length 172 [2019-10-14 21:55:09,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:09,485 INFO L462 AbstractCegarLoop]: Abstraction has 474 states and 720 transitions. [2019-10-14 21:55:09,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:55:09,485 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 720 transitions. [2019-10-14 21:55:09,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-14 21:55:09,491 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:09,492 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] [2019-10-14 21:55:09,492 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:09,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:09,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1631480425, now seen corresponding path program 1 times [2019-10-14 21:55:09,493 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:09,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988141326] [2019-10-14 21:55:09,493 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:09,493 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:09,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:09,811 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:09,953 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:55:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:10,025 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 21:55:10,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988141326] [2019-10-14 21:55:10,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907596586] [2019-10-14 21:55:10,026 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 21:55:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:10,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:55:10,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:10,409 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 21:55:10,410 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:10,410 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:55:10,411 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547722088] [2019-10-14 21:55:10,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:55:10,416 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:10,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:55:10,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:55:10,417 INFO L87 Difference]: Start difference. First operand 474 states and 720 transitions. Second operand 3 states. [2019-10-14 21:55:11,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:11,662 INFO L93 Difference]: Finished difference Result 1364 states and 2099 transitions. [2019-10-14 21:55:11,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:55:11,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 184 [2019-10-14 21:55:11,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:11,673 INFO L225 Difference]: With dead ends: 1364 [2019-10-14 21:55:11,673 INFO L226 Difference]: Without dead ends: 896 [2019-10-14 21:55:11,675 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 189 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 21:55:11,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2019-10-14 21:55:11,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 894. [2019-10-14 21:55:11,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2019-10-14 21:55:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1212 transitions. [2019-10-14 21:55:11,743 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1212 transitions. Word has length 184 [2019-10-14 21:55:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:11,746 INFO L462 AbstractCegarLoop]: Abstraction has 894 states and 1212 transitions. [2019-10-14 21:55:11,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:55:11,747 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1212 transitions. [2019-10-14 21:55:11,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-14 21:55:11,751 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:11,752 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:11,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:11,965 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:11,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1138801162, now seen corresponding path program 1 times [2019-10-14 21:55:11,966 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:11,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605716127] [2019-10-14 21:55:11,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:11,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:11,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:12,290 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:12,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605716127] [2019-10-14 21:55:12,504 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:12,504 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:55:12,504 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930675112] [2019-10-14 21:55:12,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:55:12,506 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:12,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:55:12,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:12,507 INFO L87 Difference]: Start difference. First operand 894 states and 1212 transitions. Second operand 9 states. [2019-10-14 21:55:12,701 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:13,236 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:16,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:16,119 INFO L93 Difference]: Finished difference Result 2246 states and 3211 transitions. [2019-10-14 21:55:16,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:55:16,120 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 199 [2019-10-14 21:55:16,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:16,132 INFO L225 Difference]: With dead ends: 2246 [2019-10-14 21:55:16,133 INFO L226 Difference]: Without dead ends: 1358 [2019-10-14 21:55:16,137 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:55:16,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2019-10-14 21:55:16,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1332. [2019-10-14 21:55:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1332 states. [2019-10-14 21:55:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1777 transitions. [2019-10-14 21:55:16,211 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1777 transitions. Word has length 199 [2019-10-14 21:55:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:16,211 INFO L462 AbstractCegarLoop]: Abstraction has 1332 states and 1777 transitions. [2019-10-14 21:55:16,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:55:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1777 transitions. [2019-10-14 21:55:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-10-14 21:55:16,217 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:16,218 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:16,218 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:16,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:16,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1137241398, now seen corresponding path program 1 times [2019-10-14 21:55:16,219 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:16,219 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613290066] [2019-10-14 21:55:16,219 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:16,219 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:16,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:16,576 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:16,710 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:55:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:16,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613290066] [2019-10-14 21:55:16,944 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:16,944 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:55:16,944 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884529611] [2019-10-14 21:55:16,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:55:16,945 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:16,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:55:16,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:55:16,946 INFO L87 Difference]: Start difference. First operand 1332 states and 1777 transitions. Second operand 8 states. [2019-10-14 21:55:17,098 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:17,669 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 21:55:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:20,703 INFO L93 Difference]: Finished difference Result 4018 states and 5650 transitions. [2019-10-14 21:55:20,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:55:20,703 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 206 [2019-10-14 21:55:20,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:20,721 INFO L225 Difference]: With dead ends: 4018 [2019-10-14 21:55:20,721 INFO L226 Difference]: Without dead ends: 2692 [2019-10-14 21:55:20,725 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:55:20,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2019-10-14 21:55:20,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2654. [2019-10-14 21:55:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-10-14 21:55:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3621 transitions. [2019-10-14 21:55:20,826 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3621 transitions. Word has length 206 [2019-10-14 21:55:20,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:20,826 INFO L462 AbstractCegarLoop]: Abstraction has 2654 states and 3621 transitions. [2019-10-14 21:55:20,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:55:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3621 transitions. [2019-10-14 21:55:20,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-10-14 21:55:20,835 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:20,836 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 21:55:20,836 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:20,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:20,837 INFO L82 PathProgramCache]: Analyzing trace with hash 928057599, now seen corresponding path program 1 times [2019-10-14 21:55:20,837 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:20,837 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569842467] [2019-10-14 21:55:20,837 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:20,837 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:20,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:21,034 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:55:21,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569842467] [2019-10-14 21:55:21,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743282605] [2019-10-14 21:55:21,334 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 21:55:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:21,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:55:21,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:55:21,637 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:21,637 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 21:55:21,637 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400317821] [2019-10-14 21:55:21,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:55:21,639 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:21,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:55:21,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:21,639 INFO L87 Difference]: Start difference. First operand 2654 states and 3621 transitions. Second operand 3 states. [2019-10-14 21:55:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:22,595 INFO L93 Difference]: Finished difference Result 5304 states and 7255 transitions. [2019-10-14 21:55:22,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:55:22,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 208 [2019-10-14 21:55:22,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:22,614 INFO L225 Difference]: With dead ends: 5304 [2019-10-14 21:55:22,614 INFO L226 Difference]: Without dead ends: 2656 [2019-10-14 21:55:22,624 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 212 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 21:55:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2019-10-14 21:55:22,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2654. [2019-10-14 21:55:22,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-10-14 21:55:22,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3494 transitions. [2019-10-14 21:55:22,765 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3494 transitions. Word has length 208 [2019-10-14 21:55:22,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:22,766 INFO L462 AbstractCegarLoop]: Abstraction has 2654 states and 3494 transitions. [2019-10-14 21:55:22,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:55:22,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3494 transitions. [2019-10-14 21:55:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-10-14 21:55:22,776 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:22,776 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:22,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:22,985 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:22,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:22,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1369505429, now seen corresponding path program 1 times [2019-10-14 21:55:22,986 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:22,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913652736] [2019-10-14 21:55:22,987 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:22,987 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:22,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:23,278 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:23,448 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913652736] [2019-10-14 21:55:23,448 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801543084] [2019-10-14 21:55:23,449 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 21:55:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:23,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:55:23,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:23,689 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:23,689 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-14 21:55:23,690 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079783145] [2019-10-14 21:55:23,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:55:23,691 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:23,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:55:23,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:55:23,691 INFO L87 Difference]: Start difference. First operand 2654 states and 3494 transitions. Second operand 3 states. [2019-10-14 21:55:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:24,730 INFO L93 Difference]: Finished difference Result 7854 states and 10601 transitions. [2019-10-14 21:55:24,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:55:24,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2019-10-14 21:55:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:24,759 INFO L225 Difference]: With dead ends: 7854 [2019-10-14 21:55:24,759 INFO L226 Difference]: Without dead ends: 5206 [2019-10-14 21:55:24,767 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 223 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 21:55:24,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2019-10-14 21:55:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 5200. [2019-10-14 21:55:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5200 states. [2019-10-14 21:55:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5200 states to 5200 states and 6853 transitions. [2019-10-14 21:55:24,911 INFO L78 Accepts]: Start accepts. Automaton has 5200 states and 6853 transitions. Word has length 217 [2019-10-14 21:55:24,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:24,911 INFO L462 AbstractCegarLoop]: Abstraction has 5200 states and 6853 transitions. [2019-10-14 21:55:24,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:55:24,912 INFO L276 IsEmpty]: Start isEmpty. Operand 5200 states and 6853 transitions. [2019-10-14 21:55:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-10-14 21:55:24,928 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:24,928 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:25,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:25,142 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:25,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:25,142 INFO L82 PathProgramCache]: Analyzing trace with hash 233125280, now seen corresponding path program 1 times [2019-10-14 21:55:25,142 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:25,142 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31527247] [2019-10-14 21:55:25,143 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:25,143 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:25,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:25,359 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:55:25,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31527247] [2019-10-14 21:55:25,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838609386] [2019-10-14 21:55:25,616 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 21:55:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:25,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:55:25,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:55:25,885 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:25,886 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 21:55:25,886 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949145742] [2019-10-14 21:55:25,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:55:25,887 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:25,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:55:25,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:55:25,888 INFO L87 Difference]: Start difference. First operand 5200 states and 6853 transitions. Second operand 5 states. [2019-10-14 21:55:27,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:27,390 INFO L93 Difference]: Finished difference Result 10482 states and 14338 transitions. [2019-10-14 21:55:27,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:55:27,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2019-10-14 21:55:27,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:27,417 INFO L225 Difference]: With dead ends: 10482 [2019-10-14 21:55:27,417 INFO L226 Difference]: Without dead ends: 5288 [2019-10-14 21:55:27,432 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:55:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5288 states. [2019-10-14 21:55:27,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5288 to 5216. [2019-10-14 21:55:27,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5216 states. [2019-10-14 21:55:27,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5216 states to 5216 states and 6777 transitions. [2019-10-14 21:55:27,579 INFO L78 Accepts]: Start accepts. Automaton has 5216 states and 6777 transitions. Word has length 223 [2019-10-14 21:55:27,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:27,580 INFO L462 AbstractCegarLoop]: Abstraction has 5216 states and 6777 transitions. [2019-10-14 21:55:27,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:55:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5216 states and 6777 transitions. [2019-10-14 21:55:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-10-14 21:55:27,601 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:27,602 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 21:55:27,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:27,812 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:27,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:27,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1873774260, now seen corresponding path program 1 times [2019-10-14 21:55:27,813 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:27,814 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340721509] [2019-10-14 21:55:27,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:27,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:27,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:28,032 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 65 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:55:28,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340721509] [2019-10-14 21:55:28,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104213570] [2019-10-14 21:55:28,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:28,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:55:28,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:55:28,542 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:55:28,543 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:55:28,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131491229] [2019-10-14 21:55:28,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:55:28,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:28,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:55:28,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:55:28,545 INFO L87 Difference]: Start difference. First operand 5216 states and 6777 transitions. Second operand 11 states. [2019-10-14 21:55:28,708 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:29,002 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-10-14 21:55:31,161 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:55:33,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:33,225 INFO L93 Difference]: Finished difference Result 15091 states and 22093 transitions. [2019-10-14 21:55:33,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:55:33,226 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 235 [2019-10-14 21:55:33,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:33,288 INFO L225 Difference]: With dead ends: 15091 [2019-10-14 21:55:33,289 INFO L226 Difference]: Without dead ends: 9881 [2019-10-14 21:55:33,305 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:55:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9881 states. [2019-10-14 21:55:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9881 to 9602. [2019-10-14 21:55:33,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9602 states. [2019-10-14 21:55:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9602 states to 9602 states and 12280 transitions. [2019-10-14 21:55:33,635 INFO L78 Accepts]: Start accepts. Automaton has 9602 states and 12280 transitions. Word has length 235 [2019-10-14 21:55:33,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:33,635 INFO L462 AbstractCegarLoop]: Abstraction has 9602 states and 12280 transitions. [2019-10-14 21:55:33,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:55:33,636 INFO L276 IsEmpty]: Start isEmpty. Operand 9602 states and 12280 transitions. [2019-10-14 21:55:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-10-14 21:55:33,662 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:33,663 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:55:33,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:33,868 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:33,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:33,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1051688855, now seen corresponding path program 1 times [2019-10-14 21:55:33,868 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:33,869 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672954137] [2019-10-14 21:55:33,869 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:33,869 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:33,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY