/usr/bin/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_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:18:23,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:18:23,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:18:23,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:18:23,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:18:23,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:18:23,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:18:23,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:18:23,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:18:23,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:18:23,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:18:23,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:18:23,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:18:23,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:18:23,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:18:23,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:18:23,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:18:23,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:18:23,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:18:23,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:18:23,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:18:23,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:18:23,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:18:23,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:18:23,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:18:23,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:18:23,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:18:23,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:18:23,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:18:23,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:18:23,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:18:23,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:18:23,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:18:23,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:18:23,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:18:23,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:18:23,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:18:23,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:18:23,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:18:23,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:18:23,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:18:23,218 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 [2019-11-06 19:18:23,233 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:18:23,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:18:23,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:18:23,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:18:23,235 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:18:23,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:18:23,235 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:18:23,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:18:23,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:18:23,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:18:23,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:18:23,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:18:23,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:18:23,236 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:18:23,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:18:23,237 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:18:23,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:18:23,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:18:23,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:18:23,237 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:18:23,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:18:23,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:18:23,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:18:23,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:18:23,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:18:23,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:18:23,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:18:23,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:18:23,239 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:18:23,511 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:18:23,532 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:18:23,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:18:23,538 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:18:23,538 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:18:23,539 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label35.c [2019-11-06 19:18:23,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686258c42/8c18192bb44e424f93099ef3075598d5/FLAGf9b436956 [2019-11-06 19:18:24,343 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:18:24,344 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label35.c [2019-11-06 19:18:24,364 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686258c42/8c18192bb44e424f93099ef3075598d5/FLAGf9b436956 [2019-11-06 19:18:24,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686258c42/8c18192bb44e424f93099ef3075598d5 [2019-11-06 19:18:24,555 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:18:24,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:18:24,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:24,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:18:24,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:18:24,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:24" (1/1) ... [2019-11-06 19:18:24,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60edfb3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:24, skipping insertion in model container [2019-11-06 19:18:24,566 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:24" (1/1) ... [2019-11-06 19:18:24,573 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:18:24,659 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:18:25,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:25,542 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:18:25,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:25,901 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:18:25,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:25 WrapperNode [2019-11-06 19:18:25,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:25,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:18:25,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:18:25,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:18:25,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:25" (1/1) ... [2019-11-06 19:18:25,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:25" (1/1) ... [2019-11-06 19:18:25,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:25" (1/1) ... [2019-11-06 19:18:25,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:25" (1/1) ... [2019-11-06 19:18:26,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:25" (1/1) ... [2019-11-06 19:18:26,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:25" (1/1) ... [2019-11-06 19:18:26,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:25" (1/1) ... [2019-11-06 19:18:26,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:18:26,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:18:26,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:18:26,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:18:26,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:25" (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 [2019-11-06 19:18:26,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:18:26,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:18:26,201 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:18:26,201 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:18:26,201 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:18:26,202 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:18:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:18:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:18:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:18:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:18:26,203 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:18:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:18:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:18:28,781 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:18:28,782 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:18:28,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:28 BoogieIcfgContainer [2019-11-06 19:18:28,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:18:28,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:18:28,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:18:28,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:18:28,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:18:24" (1/3) ... [2019-11-06 19:18:28,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a54e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:28, skipping insertion in model container [2019-11-06 19:18:28,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:25" (2/3) ... [2019-11-06 19:18:28,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a54e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:28, skipping insertion in model container [2019-11-06 19:18:28,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:28" (3/3) ... [2019-11-06 19:18:28,792 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label35.c [2019-11-06 19:18:28,804 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:18:28,815 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:18:28,829 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:18:28,865 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:18:28,865 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:18:28,865 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:18:28,865 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:18:28,866 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:18:28,866 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:18:28,866 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:18:28,866 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:18:28,900 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:18:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 19:18:28,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:28,912 INFO L410 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] [2019-11-06 19:18:28,915 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:28,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:28,924 INFO L82 PathProgramCache]: Analyzing trace with hash 338381554, now seen corresponding path program 1 times [2019-11-06 19:18:28,939 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:28,939 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672842683] [2019-11-06 19:18:28,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:29,359 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672842683] [2019-11-06 19:18:29,360 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:29,360 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:18:29,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618226271] [2019-11-06 19:18:29,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:29,369 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:29,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:29,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:18:29,388 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:18:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:34,156 INFO L93 Difference]: Finished difference Result 1530 states and 2865 transitions. [2019-11-06 19:18:34,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:18:34,158 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2019-11-06 19:18:34,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:34,189 INFO L225 Difference]: With dead ends: 1530 [2019-11-06 19:18:34,189 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:18:34,202 INFO L630 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 [2019-11-06 19:18:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:18:34,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:18:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:18:34,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1787 transitions. [2019-11-06 19:18:34,327 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1787 transitions. Word has length 47 [2019-11-06 19:18:34,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:34,328 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1787 transitions. [2019-11-06 19:18:34,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:34,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1787 transitions. [2019-11-06 19:18:34,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-06 19:18:34,335 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:34,335 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:34,335 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:34,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:34,336 INFO L82 PathProgramCache]: Analyzing trace with hash -8457825, now seen corresponding path program 1 times [2019-11-06 19:18:34,336 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:34,336 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801109506] [2019-11-06 19:18:34,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:34,597 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801109506] [2019-11-06 19:18:34,597 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:34,597 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:18:34,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475689566] [2019-11-06 19:18:34,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:18:34,600 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:34,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:18:34,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:18:34,600 INFO L87 Difference]: Start difference. First operand 1031 states and 1787 transitions. Second operand 8 states. [2019-11-06 19:18:39,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:39,262 INFO L93 Difference]: Finished difference Result 3125 states and 5529 transitions. [2019-11-06 19:18:39,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:18:39,264 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 116 [2019-11-06 19:18:39,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:39,285 INFO L225 Difference]: With dead ends: 3125 [2019-11-06 19:18:39,285 INFO L226 Difference]: Without dead ends: 2100 [2019-11-06 19:18:39,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:18:39,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-11-06 19:18:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1384. [2019-11-06 19:18:39,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2019-11-06 19:18:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2288 transitions. [2019-11-06 19:18:39,395 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2288 transitions. Word has length 116 [2019-11-06 19:18:39,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:39,397 INFO L462 AbstractCegarLoop]: Abstraction has 1384 states and 2288 transitions. [2019-11-06 19:18:39,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:18:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2288 transitions. [2019-11-06 19:18:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-06 19:18:39,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:39,411 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:39,411 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:39,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:39,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1750756938, now seen corresponding path program 1 times [2019-11-06 19:18:39,414 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:39,414 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320860343] [2019-11-06 19:18:39,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:39,719 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320860343] [2019-11-06 19:18:39,720 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:39,720 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:18:39,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257968822] [2019-11-06 19:18:39,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:18:39,721 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:39,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:18:39,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:18:39,722 INFO L87 Difference]: Start difference. First operand 1384 states and 2288 transitions. Second operand 9 states. [2019-11-06 19:18:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:44,779 INFO L93 Difference]: Finished difference Result 4170 states and 6860 transitions. [2019-11-06 19:18:44,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:18:44,783 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 119 [2019-11-06 19:18:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:44,802 INFO L225 Difference]: With dead ends: 4170 [2019-11-06 19:18:44,802 INFO L226 Difference]: Without dead ends: 2792 [2019-11-06 19:18:44,815 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:18:44,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2019-11-06 19:18:44,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2773. [2019-11-06 19:18:44,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2773 states. [2019-11-06 19:18:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 3896 transitions. [2019-11-06 19:18:44,915 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 3896 transitions. Word has length 119 [2019-11-06 19:18:44,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:44,918 INFO L462 AbstractCegarLoop]: Abstraction has 2773 states and 3896 transitions. [2019-11-06 19:18:44,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:18:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 3896 transitions. [2019-11-06 19:18:44,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 19:18:44,925 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:44,926 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:44,927 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:44,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:44,927 INFO L82 PathProgramCache]: Analyzing trace with hash 2059459070, now seen corresponding path program 1 times [2019-11-06 19:18:44,927 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:44,928 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203059483] [2019-11-06 19:18:44,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:45,185 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203059483] [2019-11-06 19:18:45,186 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:45,186 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:18:45,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578071490] [2019-11-06 19:18:45,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:18:45,187 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:45,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:18:45,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:18:45,188 INFO L87 Difference]: Start difference. First operand 2773 states and 3896 transitions. Second operand 9 states. [2019-11-06 19:18:51,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:51,074 INFO L93 Difference]: Finished difference Result 9052 states and 13211 transitions. [2019-11-06 19:18:51,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:18:51,074 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2019-11-06 19:18:51,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:51,105 INFO L225 Difference]: With dead ends: 9052 [2019-11-06 19:18:51,105 INFO L226 Difference]: Without dead ends: 6285 [2019-11-06 19:18:51,112 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:18:51,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2019-11-06 19:18:51,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 6259. [2019-11-06 19:18:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6259 states. [2019-11-06 19:18:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6259 states to 6259 states and 8349 transitions. [2019-11-06 19:18:51,262 INFO L78 Accepts]: Start accepts. Automaton has 6259 states and 8349 transitions. Word has length 123 [2019-11-06 19:18:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:51,262 INFO L462 AbstractCegarLoop]: Abstraction has 6259 states and 8349 transitions. [2019-11-06 19:18:51,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:18:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 6259 states and 8349 transitions. [2019-11-06 19:18:51,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2019-11-06 19:18:51,273 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:51,273 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:51,273 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:51,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:51,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1075962294, now seen corresponding path program 1 times [2019-11-06 19:18:51,274 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:51,274 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238031045] [2019-11-06 19:18:51,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 201 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 19:18:51,713 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238031045] [2019-11-06 19:18:51,713 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9039151] [2019-11-06 19:18:51,713 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 [2019-11-06 19:18:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:51,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:51,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 334 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-06 19:18:52,068 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:52,068 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-11-06 19:18:52,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462525254] [2019-11-06 19:18:52,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:18:52,070 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:52,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:18:52,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:52,071 INFO L87 Difference]: Start difference. First operand 6259 states and 8349 transitions. Second operand 11 states. [2019-11-06 19:18:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:56,185 INFO L93 Difference]: Finished difference Result 15628 states and 21508 transitions. [2019-11-06 19:18:56,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:18:56,186 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 381 [2019-11-06 19:18:56,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:56,228 INFO L225 Difference]: With dead ends: 15628 [2019-11-06 19:18:56,228 INFO L226 Difference]: Without dead ends: 9375 [2019-11-06 19:18:56,245 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 388 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:18:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9375 states. [2019-11-06 19:18:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9375 to 6953. [2019-11-06 19:18:56,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6953 states. [2019-11-06 19:18:56,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6953 states to 6953 states and 9195 transitions. [2019-11-06 19:18:56,549 INFO L78 Accepts]: Start accepts. Automaton has 6953 states and 9195 transitions. Word has length 381 [2019-11-06 19:18:56,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:56,550 INFO L462 AbstractCegarLoop]: Abstraction has 6953 states and 9195 transitions. [2019-11-06 19:18:56,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:18:56,551 INFO L276 IsEmpty]: Start isEmpty. Operand 6953 states and 9195 transitions. [2019-11-06 19:18:56,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2019-11-06 19:18:56,567 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:56,568 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:56,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:56,775 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:56,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:56,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1852265774, now seen corresponding path program 1 times [2019-11-06 19:18:56,775 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:56,776 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817453653] [2019-11-06 19:18:56,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 221 proven. 114 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 19:18:57,412 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817453653] [2019-11-06 19:18:57,412 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008547683] [2019-11-06 19:18:57,413 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 [2019-11-06 19:18:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:57,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-06 19:18:57,769 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:57,769 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 19:18:57,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162268450] [2019-11-06 19:18:57,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:18:57,771 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:57,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:18:57,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:57,771 INFO L87 Difference]: Start difference. First operand 6953 states and 9195 transitions. Second operand 12 states.