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/Problem16_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:03:57,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:03:57,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:03:57,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:03:57,130 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:03:57,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:03:57,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:03:57,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:03:57,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:03:57,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:03:57,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:03:57,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:03:57,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:03:57,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:03:57,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:03:57,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:03:57,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:03:57,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:03:57,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:03:57,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:03:57,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:03:57,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:03:57,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:03:57,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:03:57,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:03:57,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:03:57,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:03:57,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:03:57,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:03:57,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:03:57,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:03:57,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:03:57,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:03:57,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:03:57,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:03:57,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:03:57,207 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 22:03:57,226 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:03:57,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:03:57,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:03:57,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:03:57,230 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:03:57,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:03:57,230 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:03:57,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:03:57,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:03:57,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:03:57,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:03:57,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:03:57,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:03:57,233 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:03:57,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:03:57,233 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:03:57,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:03:57,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:03:57,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:03:57,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:03:57,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:03:57,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:03:57,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:03:57,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:03:57,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:03:57,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:03:57,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:03:57,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:03:57,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:03:57,504 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:03:57,514 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:03:57,519 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:03:57,521 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:03:57,521 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:03:57,522 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label16.c [2019-10-14 22:03:57,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e67752b4/6e96fb06a3914017968a97dab6b54214/FLAGb24500ff0 [2019-10-14 22:03:58,321 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:03:58,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label16.c [2019-10-14 22:03:58,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e67752b4/6e96fb06a3914017968a97dab6b54214/FLAGb24500ff0 [2019-10-14 22:03:58,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e67752b4/6e96fb06a3914017968a97dab6b54214 [2019-10-14 22:03:58,615 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:03:58,617 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:03:58,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:03:58,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:03:58,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:03:58,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:03:58" (1/1) ... [2019-10-14 22:03:58,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a96d363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:58, skipping insertion in model container [2019-10-14 22:03:58,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:03:58" (1/1) ... [2019-10-14 22:03:58,634 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:03:58,703 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:03:59,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:03:59,482 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:03:59,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:03:59,746 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:03:59,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:59 WrapperNode [2019-10-14 22:03:59,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:03:59,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:03:59,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:03:59,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:03:59,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:59" (1/1) ... [2019-10-14 22:03:59,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:59" (1/1) ... [2019-10-14 22:03:59,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:59" (1/1) ... [2019-10-14 22:03:59,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:59" (1/1) ... [2019-10-14 22:03:59,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:59" (1/1) ... [2019-10-14 22:03:59,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:59" (1/1) ... [2019-10-14 22:03:59,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:59" (1/1) ... [2019-10-14 22:03:59,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:03:59,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:03:59,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:03:59,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:03:59,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:59" (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 22:04:00,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:04:00,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:04:00,018 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:04:00,019 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:04:00,019 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:04:00,019 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:04:00,019 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:04:00,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:04:00,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:04:00,020 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:04:00,020 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:04:00,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:04:00,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:04:02,470 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:04:02,473 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:04:02,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:02 BoogieIcfgContainer [2019-10-14 22:04:02,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:04:02,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:04:02,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:04:02,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:04:02,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:03:58" (1/3) ... [2019-10-14 22:04:02,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626ef147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:02, skipping insertion in model container [2019-10-14 22:04:02,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:59" (2/3) ... [2019-10-14 22:04:02,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626ef147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:02, skipping insertion in model container [2019-10-14 22:04:02,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:02" (3/3) ... [2019-10-14 22:04:02,489 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label16.c [2019-10-14 22:04:02,499 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:04:02,510 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:04:02,522 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:04:02,563 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:04:02,563 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:04:02,563 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:04:02,564 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:04:02,564 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:04:02,564 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:04:02,564 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:04:02,564 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:04:02,591 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:04:02,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 22:04:02,602 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:02,603 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] [2019-10-14 22:04:02,605 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:02,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:02,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1899898085, now seen corresponding path program 1 times [2019-10-14 22:04:02,621 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:02,621 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28833002] [2019-10-14 22:04:02,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:02,622 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:02,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:02,966 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 22:04:02,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28833002] [2019-10-14 22:04:02,967 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:02,967 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:04:02,968 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771526409] [2019-10-14 22:04:02,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:02,973 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:02,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:02,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:04:02,990 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:04:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:08,239 INFO L93 Difference]: Finished difference Result 1515 states and 2847 transitions. [2019-10-14 22:04:08,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:04:08,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2019-10-14 22:04:08,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:08,268 INFO L225 Difference]: With dead ends: 1515 [2019-10-14 22:04:08,269 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:04:08,282 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:04:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:04:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:04:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:04:08,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1629 transitions. [2019-10-14 22:04:08,425 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1629 transitions. Word has length 48 [2019-10-14 22:04:08,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:08,426 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1629 transitions. [2019-10-14 22:04:08,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:08,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1629 transitions. [2019-10-14 22:04:08,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-14 22:04:08,444 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:08,445 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:04:08,446 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:08,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:08,447 INFO L82 PathProgramCache]: Analyzing trace with hash 301606541, now seen corresponding path program 1 times [2019-10-14 22:04:08,447 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:08,447 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349190015] [2019-10-14 22:04:08,447 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:08,447 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:08,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:08,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349190015] [2019-10-14 22:04:08,853 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:08,853 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:04:08,854 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105310105] [2019-10-14 22:04:08,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:04:08,856 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:08,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:04:08,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:04:08,857 INFO L87 Difference]: Start difference. First operand 1031 states and 1629 transitions. Second operand 8 states. [2019-10-14 22:04:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:16,167 INFO L93 Difference]: Finished difference Result 3900 states and 6464 transitions. [2019-10-14 22:04:16,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:04:16,168 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2019-10-14 22:04:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:16,198 INFO L225 Difference]: With dead ends: 3900 [2019-10-14 22:04:16,199 INFO L226 Difference]: Without dead ends: 2875 [2019-10-14 22:04:16,204 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:04:16,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2019-10-14 22:04:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2811. [2019-10-14 22:04:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2811 states. [2019-10-14 22:04:16,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 4308 transitions. [2019-10-14 22:04:16,340 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 4308 transitions. Word has length 123 [2019-10-14 22:04:16,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:16,344 INFO L462 AbstractCegarLoop]: Abstraction has 2811 states and 4308 transitions. [2019-10-14 22:04:16,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:04:16,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 4308 transitions. [2019-10-14 22:04:16,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-14 22:04:16,355 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:16,356 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:04:16,357 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:16,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:16,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1614630469, now seen corresponding path program 1 times [2019-10-14 22:04:16,361 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:16,361 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228235453] [2019-10-14 22:04:16,361 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:16,361 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:16,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:16,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228235453] [2019-10-14 22:04:16,641 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:16,641 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:04:16,641 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633399569] [2019-10-14 22:04:16,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:04:16,642 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:16,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:04:16,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:16,643 INFO L87 Difference]: Start difference. First operand 2811 states and 4308 transitions. Second operand 9 states. [2019-10-14 22:04:22,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:22,528 INFO L93 Difference]: Finished difference Result 9864 states and 15975 transitions. [2019-10-14 22:04:22,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 22:04:22,539 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 127 [2019-10-14 22:04:22,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:22,583 INFO L225 Difference]: With dead ends: 9864 [2019-10-14 22:04:22,583 INFO L226 Difference]: Without dead ends: 7059 [2019-10-14 22:04:22,594 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:04:22,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7059 states. [2019-10-14 22:04:22,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7059 to 7025. [2019-10-14 22:04:22,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7025 states. [2019-10-14 22:04:22,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7025 states to 7025 states and 10409 transitions. [2019-10-14 22:04:22,802 INFO L78 Accepts]: Start accepts. Automaton has 7025 states and 10409 transitions. Word has length 127 [2019-10-14 22:04:22,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:22,802 INFO L462 AbstractCegarLoop]: Abstraction has 7025 states and 10409 transitions. [2019-10-14 22:04:22,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:04:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 7025 states and 10409 transitions. [2019-10-14 22:04:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-14 22:04:22,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:22,806 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, 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] [2019-10-14 22:04:22,807 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:22,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:22,807 INFO L82 PathProgramCache]: Analyzing trace with hash 462428277, now seen corresponding path program 1 times [2019-10-14 22:04:22,807 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:22,808 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540366754] [2019-10-14 22:04:22,808 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:22,808 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:22,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 22:04:23,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540366754] [2019-10-14 22:04:23,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615809940] [2019-10-14 22:04:23,097 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 22:04:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:23,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:23,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:23,332 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:23,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-14 22:04:23,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565867774] [2019-10-14 22:04:23,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:04:23,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:23,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:04:23,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:23,334 INFO L87 Difference]: Start difference. First operand 7025 states and 10409 transitions. Second operand 11 states. [2019-10-14 22:04:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:27,933 INFO L93 Difference]: Finished difference Result 17510 states and 26765 transitions. [2019-10-14 22:04:27,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:04:27,934 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 222 [2019-10-14 22:04:27,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:27,992 INFO L225 Difference]: With dead ends: 17510 [2019-10-14 22:04:27,992 INFO L226 Difference]: Without dead ends: 10491 [2019-10-14 22:04:28,014 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:04:28,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2019-10-14 22:04:28,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 8749. [2019-10-14 22:04:28,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8749 states. [2019-10-14 22:04:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8749 states to 8749 states and 12758 transitions. [2019-10-14 22:04:28,316 INFO L78 Accepts]: Start accepts. Automaton has 8749 states and 12758 transitions. Word has length 222 [2019-10-14 22:04:28,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:28,317 INFO L462 AbstractCegarLoop]: Abstraction has 8749 states and 12758 transitions. [2019-10-14 22:04:28,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:04:28,318 INFO L276 IsEmpty]: Start isEmpty. Operand 8749 states and 12758 transitions. [2019-10-14 22:04:28,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2019-10-14 22:04:28,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:28,329 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, 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] [2019-10-14 22:04:28,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:28,594 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:28,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:28,595 INFO L82 PathProgramCache]: Analyzing trace with hash -986396595, now seen corresponding path program 1 times [2019-10-14 22:04:28,595 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:28,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662381904] [2019-10-14 22:04:28,596 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:28,596 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:28,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 82 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:04:29,034 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662381904] [2019-10-14 22:04:29,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900057137] [2019-10-14 22:04:29,035 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 22:04:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:29,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:29,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-14 22:04:29,338 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:29,338 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:04:29,339 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683607245] [2019-10-14 22:04:29,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:29,341 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:29,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:29,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:29,342 INFO L87 Difference]: Start difference. First operand 8749 states and 12758 transitions. Second operand 5 states. [2019-10-14 22:04:31,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:31,726 INFO L93 Difference]: Finished difference Result 19591 states and 28696 transitions. [2019-10-14 22:04:31,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 22:04:31,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 298 [2019-10-14 22:04:31,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:31,780 INFO L225 Difference]: With dead ends: 19591 [2019-10-14 22:04:31,780 INFO L226 Difference]: Without dead ends: 10848 [2019-10-14 22:04:31,804 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10848 states. [2019-10-14 22:04:32,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10848 to 9442. [2019-10-14 22:04:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9442 states. [2019-10-14 22:04:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9442 states to 9442 states and 12597 transitions. [2019-10-14 22:04:32,067 INFO L78 Accepts]: Start accepts. Automaton has 9442 states and 12597 transitions. Word has length 298 [2019-10-14 22:04:32,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:32,068 INFO L462 AbstractCegarLoop]: Abstraction has 9442 states and 12597 transitions. [2019-10-14 22:04:32,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 9442 states and 12597 transitions. [2019-10-14 22:04:32,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2019-10-14 22:04:32,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:32,147 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:04:32,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:32,353 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:32,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:32,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1511616815, now seen corresponding path program 1 times [2019-10-14 22:04:32,358 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:32,358 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206774422] [2019-10-14 22:04:32,359 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:32,359 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:32,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:04:32,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206774422] [2019-10-14 22:04:32,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680338825] [2019-10-14 22:04:32,887 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 22:04:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:33,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:33,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:33,217 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:33,217 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:04:33,217 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507080862] [2019-10-14 22:04:33,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:04:33,219 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:33,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:04:33,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:33,219 INFO L87 Difference]: Start difference. First operand 9442 states and 12597 transitions. Second operand 11 states.