java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:00:32,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:00:32,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:00:32,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:00:32,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:00:32,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:00:32,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:00:32,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:00:32,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:00:32,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:00:32,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:00:32,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:00:32,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:00:32,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:00:32,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:00:32,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:00:32,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:00:32,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:00:32,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:00:32,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:00:32,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:00:32,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:00:32,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:00:32,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:00:32,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:00:32,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:00:32,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:00:32,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:00:32,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:00:32,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:00:32,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:00:32,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:00:32,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:00:32,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:00:32,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:00:32,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:00:32,230 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:00:32,258 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:00:32,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:00:32,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:00:32,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:00:32,260 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:00:32,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:00:32,261 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:00:32,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:00:32,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:00:32,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:00:32,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:00:32,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:00:32,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:00:32,267 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:00:32,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:00:32,267 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:00:32,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:00:32,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:00:32,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:00:32,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:00:32,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:00:32,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:00:32,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:00:32,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:00:32,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:00:32,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:00:32,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:00:32,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:00:32,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:00:32,537 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:00:32,553 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:00:32,557 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:00:32,558 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:00:32,559 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:00:32,560 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label37.c [2019-10-13 18:00:32,632 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7454cda75/5a6afaed351048af8aa77400ed943c50/FLAGd080b8435 [2019-10-13 18:00:33,271 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:00:33,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label37.c [2019-10-13 18:00:33,286 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7454cda75/5a6afaed351048af8aa77400ed943c50/FLAGd080b8435 [2019-10-13 18:00:33,469 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7454cda75/5a6afaed351048af8aa77400ed943c50 [2019-10-13 18:00:33,479 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:00:33,480 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:00:33,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:33,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:00:33,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:00:33,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:33" (1/1) ... [2019-10-13 18:00:33,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1168eabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:33, skipping insertion in model container [2019-10-13 18:00:33,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:33" (1/1) ... [2019-10-13 18:00:33,496 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:00:33,575 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:00:34,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:34,265 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:00:34,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:34,503 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:00:34,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:34 WrapperNode [2019-10-13 18:00:34,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:34,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:00:34,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:00:34,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:00:34,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:34" (1/1) ... [2019-10-13 18:00:34,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:34" (1/1) ... [2019-10-13 18:00:34,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:34" (1/1) ... [2019-10-13 18:00:34,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:34" (1/1) ... [2019-10-13 18:00:34,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:34" (1/1) ... [2019-10-13 18:00:34,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:34" (1/1) ... [2019-10-13 18:00:34,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:34" (1/1) ... [2019-10-13 18:00:34,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:00:34,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:00:34,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:00:34,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:00:34,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:00:34,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:00:34,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:00:34,775 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:00:34,776 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:00:34,776 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:00:34,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:00:34,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:00:34,777 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:00:34,777 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:00:34,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:00:34,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:00:36,637 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:00:36,638 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:00:36,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:36 BoogieIcfgContainer [2019-10-13 18:00:36,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:00:36,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:00:36,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:00:36,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:00:36,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:00:33" (1/3) ... [2019-10-13 18:00:36,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@125e1254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:36, skipping insertion in model container [2019-10-13 18:00:36,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:34" (2/3) ... [2019-10-13 18:00:36,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@125e1254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:36, skipping insertion in model container [2019-10-13 18:00:36,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:36" (3/3) ... [2019-10-13 18:00:36,650 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label37.c [2019-10-13 18:00:36,661 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:00:36,670 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:00:36,681 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:00:36,711 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:00:36,711 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:00:36,711 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:00:36,711 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:00:36,711 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:00:36,712 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:00:36,712 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:00:36,712 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:00:36,773 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 18:00:36,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-13 18:00:36,782 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:36,783 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] [2019-10-13 18:00:36,785 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:36,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:36,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1618793274, now seen corresponding path program 1 times [2019-10-13 18:00:36,799 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:36,800 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422854503] [2019-10-13 18:00:36,800 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:36,800 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:36,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:37,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422854503] [2019-10-13 18:00:37,246 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:37,246 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:00:37,247 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690769348] [2019-10-13 18:00:37,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:37,253 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:37,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:37,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:00:37,273 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-13 18:00:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:40,503 INFO L93 Difference]: Finished difference Result 1006 states and 1797 transitions. [2019-10-13 18:00:40,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:00:40,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2019-10-13 18:00:40,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:40,526 INFO L225 Difference]: With dead ends: 1006 [2019-10-13 18:00:40,527 INFO L226 Difference]: Without dead ends: 630 [2019-10-13 18:00:40,536 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:40,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2019-10-13 18:00:40,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 620. [2019-10-13 18:00:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-13 18:00:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 915 transitions. [2019-10-13 18:00:40,628 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 915 transitions. Word has length 55 [2019-10-13 18:00:40,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:40,630 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 915 transitions. [2019-10-13 18:00:40,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:40,630 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 915 transitions. [2019-10-13 18:00:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 18:00:40,637 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:40,638 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:40,638 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:40,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:40,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2133526889, now seen corresponding path program 1 times [2019-10-13 18:00:40,639 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:40,639 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016722600] [2019-10-13 18:00:40,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:40,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:40,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 47 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:40,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016722600] [2019-10-13 18:00:40,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910104925] [2019-10-13 18:00:40,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:40,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:40,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:41,055 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:41,056 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:00:41,056 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764162245] [2019-10-13 18:00:41,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:41,058 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:41,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:41,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:41,059 INFO L87 Difference]: Start difference. First operand 620 states and 915 transitions. Second operand 3 states. [2019-10-13 18:00:42,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:42,108 INFO L93 Difference]: Finished difference Result 1816 states and 2718 transitions. [2019-10-13 18:00:42,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:42,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2019-10-13 18:00:42,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:42,119 INFO L225 Difference]: With dead ends: 1816 [2019-10-13 18:00:42,119 INFO L226 Difference]: Without dead ends: 1202 [2019-10-13 18:00:42,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:42,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2019-10-13 18:00:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1194. [2019-10-13 18:00:42,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1194 states. [2019-10-13 18:00:42,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1631 transitions. [2019-10-13 18:00:42,175 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1631 transitions. Word has length 128 [2019-10-13 18:00:42,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:42,176 INFO L462 AbstractCegarLoop]: Abstraction has 1194 states and 1631 transitions. [2019-10-13 18:00:42,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:42,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1631 transitions. [2019-10-13 18:00:42,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 18:00:42,180 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:42,181 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:42,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:42,391 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:42,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:42,391 INFO L82 PathProgramCache]: Analyzing trace with hash 778986062, now seen corresponding path program 1 times [2019-10-13 18:00:42,392 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:42,392 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80830675] [2019-10-13 18:00:42,392 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:42,392 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:42,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:42,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80830675] [2019-10-13 18:00:42,718 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:42,719 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 18:00:42,719 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743232898] [2019-10-13 18:00:42,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 18:00:42,729 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:42,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 18:00:42,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:42,731 INFO L87 Difference]: Start difference. First operand 1194 states and 1631 transitions. Second operand 7 states. [2019-10-13 18:00:45,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:45,229 INFO L93 Difference]: Finished difference Result 3415 states and 4910 transitions. [2019-10-13 18:00:45,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:00:45,231 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 153 [2019-10-13 18:00:45,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:45,245 INFO L225 Difference]: With dead ends: 3415 [2019-10-13 18:00:45,245 INFO L226 Difference]: Without dead ends: 2227 [2019-10-13 18:00:45,249 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:00:45,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2019-10-13 18:00:45,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 2196. [2019-10-13 18:00:45,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2196 states. [2019-10-13 18:00:45,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 2885 transitions. [2019-10-13 18:00:45,317 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 2885 transitions. Word has length 153 [2019-10-13 18:00:45,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:45,318 INFO L462 AbstractCegarLoop]: Abstraction has 2196 states and 2885 transitions. [2019-10-13 18:00:45,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 18:00:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 2885 transitions. [2019-10-13 18:00:45,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-13 18:00:45,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:45,324 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:00:45,324 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:45,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:45,325 INFO L82 PathProgramCache]: Analyzing trace with hash 697486710, now seen corresponding path program 1 times [2019-10-13 18:00:45,325 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:45,325 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466014124] [2019-10-13 18:00:45,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:45,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:45,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:45,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:00:45,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466014124] [2019-10-13 18:00:45,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481239739] [2019-10-13 18:00:45,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:45,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:45,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:00:45,817 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:45,817 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:00:45,818 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180103176] [2019-10-13 18:00:45,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:45,819 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:45,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:45,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:45,820 INFO L87 Difference]: Start difference. First operand 2196 states and 2885 transitions. Second operand 3 states. [2019-10-13 18:00:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:46,825 INFO L93 Difference]: Finished difference Result 5557 states and 7539 transitions. [2019-10-13 18:00:46,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:46,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 213 [2019-10-13 18:00:46,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:46,850 INFO L225 Difference]: With dead ends: 5557 [2019-10-13 18:00:46,850 INFO L226 Difference]: Without dead ends: 3367 [2019-10-13 18:00:46,858 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:46,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2019-10-13 18:00:47,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 3351. [2019-10-13 18:00:47,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3351 states. [2019-10-13 18:00:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3351 states to 3351 states and 4511 transitions. [2019-10-13 18:00:47,041 INFO L78 Accepts]: Start accepts. Automaton has 3351 states and 4511 transitions. Word has length 213 [2019-10-13 18:00:47,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:47,043 INFO L462 AbstractCegarLoop]: Abstraction has 3351 states and 4511 transitions. [2019-10-13 18:00:47,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:47,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3351 states and 4511 transitions. [2019-10-13 18:00:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-13 18:00:47,053 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:47,053 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:00:47,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:47,262 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:47,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:47,263 INFO L82 PathProgramCache]: Analyzing trace with hash 158032221, now seen corresponding path program 1 times [2019-10-13 18:00:47,263 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:47,263 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564957972] [2019-10-13 18:00:47,263 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:47,264 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:47,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:00:47,499 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564957972] [2019-10-13 18:00:47,499 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589977636] [2019-10-13 18:00:47,499 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 [2019-10-13 18:00:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:47,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:47,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:00:47,648 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:47,648 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:00:47,648 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149939199] [2019-10-13 18:00:47,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:47,649 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:47,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:47,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:47,649 INFO L87 Difference]: Start difference. First operand 3351 states and 4511 transitions. Second operand 3 states. [2019-10-13 18:00:48,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:48,714 INFO L93 Difference]: Finished difference Result 7660 states and 10549 transitions. [2019-10-13 18:00:48,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:48,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 230 [2019-10-13 18:00:48,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:48,740 INFO L225 Difference]: With dead ends: 7660 [2019-10-13 18:00:48,740 INFO L226 Difference]: Without dead ends: 4315 [2019-10-13 18:00:48,750 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:48,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2019-10-13 18:00:48,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 4308. [2019-10-13 18:00:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4308 states. [2019-10-13 18:00:48,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4308 states to 4308 states and 5732 transitions. [2019-10-13 18:00:48,861 INFO L78 Accepts]: Start accepts. Automaton has 4308 states and 5732 transitions. Word has length 230 [2019-10-13 18:00:48,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:48,862 INFO L462 AbstractCegarLoop]: Abstraction has 4308 states and 5732 transitions. [2019-10-13 18:00:48,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:48,862 INFO L276 IsEmpty]: Start isEmpty. Operand 4308 states and 5732 transitions. [2019-10-13 18:00:48,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2019-10-13 18:00:48,874 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:48,874 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:00:49,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:49,079 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:49,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:49,080 INFO L82 PathProgramCache]: Analyzing trace with hash -705099007, now seen corresponding path program 1 times [2019-10-13 18:00:49,080 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:49,081 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431903903] [2019-10-13 18:00:49,081 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:49,082 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:49,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 5 proven. 163 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:00:49,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431903903] [2019-10-13 18:00:49,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388388478] [2019-10-13 18:00:49,758 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 [2019-10-13 18:00:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:49,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:00:49,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:49,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-13 18:00:50,073 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:50,073 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2019-10-13 18:00:50,074 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627435409] [2019-10-13 18:00:50,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:50,074 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:50,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:50,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:00:50,075 INFO L87 Difference]: Start difference. First operand 4308 states and 5732 transitions. Second operand 5 states. [2019-10-13 18:00:51,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:51,484 INFO L93 Difference]: Finished difference Result 8673 states and 11648 transitions. [2019-10-13 18:00:51,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:00:51,489 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 294 [2019-10-13 18:00:51,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:51,509 INFO L225 Difference]: With dead ends: 8673 [2019-10-13 18:00:51,510 INFO L226 Difference]: Without dead ends: 4371 [2019-10-13 18:00:51,521 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2019-10-13 18:00:51,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2019-10-13 18:00:51,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 4350. [2019-10-13 18:00:51,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4350 states. [2019-10-13 18:00:51,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4350 states to 4350 states and 5788 transitions. [2019-10-13 18:00:51,634 INFO L78 Accepts]: Start accepts. Automaton has 4350 states and 5788 transitions. Word has length 294 [2019-10-13 18:00:51,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:51,634 INFO L462 AbstractCegarLoop]: Abstraction has 4350 states and 5788 transitions. [2019-10-13 18:00:51,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 4350 states and 5788 transitions. [2019-10-13 18:00:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2019-10-13 18:00:51,653 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:51,653 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-10-13 18:00:51,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:51,862 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:51,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:51,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1581254081, now seen corresponding path program 1 times [2019-10-13 18:00:51,862 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:51,863 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796650317] [2019-10-13 18:00:51,863 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:51,863 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:51,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 190 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:00:52,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796650317] [2019-10-13 18:00:52,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147851170] [2019-10-13 18:00:52,400 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 [2019-10-13 18:00:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:52,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 18:00:52,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:52,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:52,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:53,402 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((v_~a29~0_506 Int)) (let ((.cse1 (+ v_~a29~0_506 69157))) (let ((.cse0 (mod .cse1 299861))) (and (<= |c_old(~a29~0)| v_~a29~0_506) (<= c_~a29~0 (+ .cse0 277)) (not (= .cse0 0)) (< .cse1 0))))) (exists ((v_~a29~0_506 Int)) (let ((.cse2 (+ v_~a29~0_506 69157))) (and (<= |c_old(~a29~0)| v_~a29~0_506) (<= c_~a29~0 (+ (mod .cse2 299861) 300138)) (<= 0 .cse2)))) (exists ((v_~a29~0_506 Int)) (let ((.cse3 (mod (+ v_~a29~0_506 69157) 299861))) (and (<= |c_old(~a29~0)| v_~a29~0_506) (<= c_~a29~0 (+ .cse3 300138)) (= .cse3 0))))) is different from true [2019-10-13 18:01:04,176 WARN L191 SmtUtils]: Spent 3.59 s on a formula simplification. DAG size of input: 37 DAG size of output: 15 [2019-10-13 18:01:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 4 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2019-10-13 18:01:04,481 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:01:04,481 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2019-10-13 18:01:04,481 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955706275] [2019-10-13 18:01:04,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:01:04,483 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:04,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:01:04,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=165, Unknown=5, NotChecked=26, Total=240 [2019-10-13 18:01:04,484 INFO L87 Difference]: Start difference. First operand 4350 states and 5788 transitions. Second operand 16 states. [2019-10-13 18:01:06,644 WARN L191 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 22