/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:13:16,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:13:16,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:13:16,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:13:16,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:13:16,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:13:16,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:13:16,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:13:16,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:13:16,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:13:16,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:13:16,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:13:16,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:13:16,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:13:16,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:13:16,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:13:16,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:13:16,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:13:16,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:13:16,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:13:16,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:13:16,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:13:16,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:13:16,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:13:16,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:13:16,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:13:16,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:13:16,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:13:16,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:13:16,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:13:16,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:13:16,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:13:16,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:13:16,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:13:16,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:13:16,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:13:16,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:13:16,255 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:13:16,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:13:16,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:13:16,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:13:16,258 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 11:13:16,285 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:13:16,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:13:16,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:13:16,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:13:16,287 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:13:16,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:13:16,287 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:13:16,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:13:16,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:13:16,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:13:16,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:13:16,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:13:16,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:13:16,289 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:13:16,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:13:16,289 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:13:16,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:13:16,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:13:16,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:13:16,290 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:13:16,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:13:16,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:13:16,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:13:16,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:13:16,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:13:16,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:13:16,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:13:16,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:13:16,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:13:16,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:13:16,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:13:16,803 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:13:16,808 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:13:16,810 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:13:16,812 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:13:16,813 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label06.c [2020-09-25 11:13:16,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/304bbe01b/2e593a3136f343d2ab163151713591a4/FLAG5ad421593 [2020-09-25 11:13:17,597 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:13:17,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label06.c [2020-09-25 11:13:17,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/304bbe01b/2e593a3136f343d2ab163151713591a4/FLAG5ad421593 [2020-09-25 11:13:17,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/304bbe01b/2e593a3136f343d2ab163151713591a4 [2020-09-25 11:13:17,814 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:13:17,820 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:13:17,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:13:17,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:13:17,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:13:17,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:13:17" (1/1) ... [2020-09-25 11:13:17,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f80c2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:17, skipping insertion in model container [2020-09-25 11:13:17,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:13:17" (1/1) ... [2020-09-25 11:13:17,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:13:17,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:13:18,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:13:18,405 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:13:18,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:13:18,670 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:13:18,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:18 WrapperNode [2020-09-25 11:13:18,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:13:18,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:13:18,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:13:18,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:13:18,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:18" (1/1) ... [2020-09-25 11:13:18,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:18" (1/1) ... [2020-09-25 11:13:18,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:18" (1/1) ... [2020-09-25 11:13:18,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:18" (1/1) ... [2020-09-25 11:13:18,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:18" (1/1) ... [2020-09-25 11:13:18,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:18" (1/1) ... [2020-09-25 11:13:18,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:18" (1/1) ... [2020-09-25 11:13:18,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:13:18,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:13:18,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:13:18,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:13:18,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-25 11:13:18,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:13:18,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:13:18,893 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 11:13:18,893 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:13:18,893 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 11:13:18,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:13:18,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:13:18,894 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:13:18,894 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:13:18,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:13:18,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:13:20,406 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:13:20,407 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:13:20,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:13:20 BoogieIcfgContainer [2020-09-25 11:13:20,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:13:20,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:13:20,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:13:20,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:13:20,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:13:17" (1/3) ... [2020-09-25 11:13:20,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9e9bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:13:20, skipping insertion in model container [2020-09-25 11:13:20,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:13:18" (2/3) ... [2020-09-25 11:13:20,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e9e9bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:13:20, skipping insertion in model container [2020-09-25 11:13:20,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:13:20" (3/3) ... [2020-09-25 11:13:20,431 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label06.c [2020-09-25 11:13:20,444 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:13:20,455 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:13:20,477 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:13:20,511 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:13:20,512 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:13:20,512 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:13:20,512 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:13:20,512 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:13:20,512 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:13:20,513 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:13:20,513 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:13:20,544 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-25 11:13:20,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-25 11:13:20,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:20,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:13:20,571 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:20,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:20,579 INFO L82 PathProgramCache]: Analyzing trace with hash 730138415, now seen corresponding path program 1 times [2020-09-25 11:13:20,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:20,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251981973] [2020-09-25 11:13:20,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:21,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:21,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:22,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:22,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:24,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:25,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:25,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:25,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:25,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-09-25 11:13:25,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:13:25,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 11:13:25,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:25,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:25,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:13:25,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:13:25,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-09-25 11:13:25,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 11:13:26,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:26,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:26,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:26,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:13:26,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:26,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-25 11:13:26,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:26,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:26,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:13:26,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:26,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 11:13:26,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:13:26,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251981973] [2020-09-25 11:13:26,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:13:26,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:13:26,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228498506] [2020-09-25 11:13:26,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:13:26,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:26,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:13:26,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:13:26,429 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 4 states. [2020-09-25 11:13:28,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:28,671 INFO L93 Difference]: Finished difference Result 1340 states and 1738 transitions. [2020-09-25 11:13:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:13:28,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2020-09-25 11:13:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:28,719 INFO L225 Difference]: With dead ends: 1340 [2020-09-25 11:13:28,719 INFO L226 Difference]: Without dead ends: 741 [2020-09-25 11:13:28,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:13:28,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-09-25 11:13:28,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 664. [2020-09-25 11:13:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2020-09-25 11:13:28,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 780 transitions. [2020-09-25 11:13:28,853 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 780 transitions. Word has length 152 [2020-09-25 11:13:28,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:28,857 INFO L479 AbstractCegarLoop]: Abstraction has 664 states and 780 transitions. [2020-09-25 11:13:28,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:13:28,857 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 780 transitions. [2020-09-25 11:13:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-25 11:13:28,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:28,873 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:13:28,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:13:28,873 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:28,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:28,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1669034880, now seen corresponding path program 1 times [2020-09-25 11:13:28,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:28,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51134958] [2020-09-25 11:13:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:28,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:29,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:29,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:29,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:29,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:30,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:31,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:33,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:33,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-09-25 11:13:33,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:13:33,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 11:13:33,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:33,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:33,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:13:33,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 11:13:33,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-09-25 11:13:33,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 11:13:34,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:34,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:34,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:34,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:13:34,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:34,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 11:13:34,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:34,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:34,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:13:34,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:34,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:13:34,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-25 11:13:34,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:13:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:34,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:34,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:34,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-25 11:13:34,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:34,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-25 11:13:34,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:34,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:34,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:13:34,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:34,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 11:13:34,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:13:34,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51134958] [2020-09-25 11:13:34,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:13:34,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:13:34,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064721898] [2020-09-25 11:13:34,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:13:34,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:34,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:13:34,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:13:34,666 INFO L87 Difference]: Start difference. First operand 664 states and 780 transitions. Second operand 9 states. [2020-09-25 11:13:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:39,662 INFO L93 Difference]: Finished difference Result 2178 states and 2848 transitions. [2020-09-25 11:13:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 11:13:39,663 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 173 [2020-09-25 11:13:39,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:39,675 INFO L225 Difference]: With dead ends: 2178 [2020-09-25 11:13:39,675 INFO L226 Difference]: Without dead ends: 1100 [2020-09-25 11:13:39,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-09-25 11:13:39,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2020-09-25 11:13:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1064. [2020-09-25 11:13:39,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-09-25 11:13:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1200 transitions. [2020-09-25 11:13:39,756 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1200 transitions. Word has length 173 [2020-09-25 11:13:39,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:39,756 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1200 transitions. [2020-09-25 11:13:39,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:13:39,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1200 transitions. [2020-09-25 11:13:39,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-09-25 11:13:39,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:39,762 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:13:39,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:13:39,763 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:39,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:39,763 INFO L82 PathProgramCache]: Analyzing trace with hash -139356601, now seen corresponding path program 1 times [2020-09-25 11:13:39,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:39,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462629173] [2020-09-25 11:13:39,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:39,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:39,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:40,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:40,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:40,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:40,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:44,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:44,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:44,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:44,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-09-25 11:13:44,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:13:44,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 11:13:44,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:44,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:44,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:13:44,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-25 11:13:44,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-09-25 11:13:44,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:44,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:44,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:44,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:44,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:13:44,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:44,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 11:13:44,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:44,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:44,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:13:44,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:44,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:13:44,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:13:45,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:13:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:45,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:45,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:45,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 11:13:45,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:45,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 11:13:45,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:45,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:13:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:45,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 11:13:45,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:13:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:13:45,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462629173] [2020-09-25 11:13:45,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:13:45,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:13:45,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864808648] [2020-09-25 11:13:45,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:13:45,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:45,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:13:45,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:13:45,138 INFO L87 Difference]: Start difference. First operand 1064 states and 1200 transitions. Second operand 5 states. [2020-09-25 11:13:46,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:46,965 INFO L93 Difference]: Finished difference Result 2456 states and 2855 transitions. [2020-09-25 11:13:46,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:13:46,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2020-09-25 11:13:46,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:46,973 INFO L225 Difference]: With dead ends: 2456 [2020-09-25 11:13:46,974 INFO L226 Difference]: Without dead ends: 1416 [2020-09-25 11:13:46,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:13:46,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2020-09-25 11:13:47,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1352. [2020-09-25 11:13:47,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-09-25 11:13:47,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1563 transitions. [2020-09-25 11:13:47,025 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1563 transitions. Word has length 178 [2020-09-25 11:13:47,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:47,025 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1563 transitions. [2020-09-25 11:13:47,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:13:47,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1563 transitions. [2020-09-25 11:13:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-09-25 11:13:47,031 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:47,032 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:13:47,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:13:47,032 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:47,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:47,033 INFO L82 PathProgramCache]: Analyzing trace with hash -114572164, now seen corresponding path program 1 times [2020-09-25 11:13:47,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:47,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048942857] [2020-09-25 11:13:47,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:47,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:47,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:47,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:47,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:49,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:49,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:49,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:49,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:49,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:49,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:52,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:52,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-09-25 11:13:52,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 11:13:52,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 11:13:52,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:52,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 11:13:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-09-25 11:13:52,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-09-25 11:13:52,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:52,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:13:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:52,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:52,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:52,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:13:52,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:52,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 11:13:52,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:52,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:52,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:13:52,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:52,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:13:52,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:53,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:13:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:53,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:53,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:53,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 11:13:53,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:53,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 11:13:53,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:53,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:53,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:13:53,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:53,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:13:53,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:13:53,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 11:13:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:53,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:53,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:13:53,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:13:53,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:13:53,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-25 11:13:53,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:13:53,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:13:53,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:13:53,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:13:53,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 11:13:53,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:13:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 11:13:53,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048942857] [2020-09-25 11:13:53,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:13:53,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 11:13:53,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088778758] [2020-09-25 11:13:53,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 11:13:53,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:13:53,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 11:13:53,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:13:53,290 INFO L87 Difference]: Start difference. First operand 1352 states and 1563 transitions. Second operand 15 states. [2020-09-25 11:13:53,941 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-09-25 11:13:54,384 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2020-09-25 11:13:55,472 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-09-25 11:13:55,964 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-09-25 11:13:56,425 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 88 [2020-09-25 11:13:56,689 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2020-09-25 11:13:58,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:13:58,551 INFO L93 Difference]: Finished difference Result 2723 states and 3197 transitions. [2020-09-25 11:13:58,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 11:13:58,552 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 197 [2020-09-25 11:13:58,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:13:58,562 INFO L225 Difference]: With dead ends: 2723 [2020-09-25 11:13:58,563 INFO L226 Difference]: Without dead ends: 1395 [2020-09-25 11:13:58,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-09-25 11:13:58,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2020-09-25 11:13:58,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1349. [2020-09-25 11:13:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1349 states. [2020-09-25 11:13:58,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1547 transitions. [2020-09-25 11:13:58,624 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1547 transitions. Word has length 197 [2020-09-25 11:13:58,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:13:58,626 INFO L479 AbstractCegarLoop]: Abstraction has 1349 states and 1547 transitions. [2020-09-25 11:13:58,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 11:13:58,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1547 transitions. [2020-09-25 11:13:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-09-25 11:13:58,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:13:58,633 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:13:58,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:13:58,634 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:13:58,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:13:58,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1327822116, now seen corresponding path program 1 times [2020-09-25 11:13:58,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:13:58,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308009806] [2020-09-25 11:13:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:13:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:13:58,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:58,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:59,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:59,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:59,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:59,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:59,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:13:59,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:01,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:03,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:03,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-09-25 11:14:03,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:14:03,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-09-25 11:14:03,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:03,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:03,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:14:03,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-09-25 11:14:03,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-09-25 11:14:03,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:14:03,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:14:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:03,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:03,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:03,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:03,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:03,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:14:03,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:03,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:03,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:14:03,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:03,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:14:03,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:14:03,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-25 11:14:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:03,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:03,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:03,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 11:14:03,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:03,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 11:14:03,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:03,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:03,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:14:03,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:03,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:14:03,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:14:03,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-25 11:14:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:03,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:03,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:14:03,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 11:14:03,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:14:03,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-25 11:14:03,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:14:03,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:14:03,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:14:03,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:14:03,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 11:14:03,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:14:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-25 11:14:03,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308009806] [2020-09-25 11:14:03,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:14:03,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:14:03,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061421572] [2020-09-25 11:14:03,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:14:03,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:14:03,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:14:03,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:14:03,997 INFO L87 Difference]: Start difference. First operand 1349 states and 1547 transitions. Second operand 5 states. [2020-09-25 11:14:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:14:06,163 INFO L93 Difference]: Finished difference Result 3401 states and 4018 transitions. [2020-09-25 11:14:06,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:14:06,166 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 211 [2020-09-25 11:14:06,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:14:06,181 INFO L225 Difference]: With dead ends: 3401 [2020-09-25 11:14:06,181 INFO L226 Difference]: Without dead ends: 2076 [2020-09-25 11:14:06,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:14:06,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2020-09-25 11:14:06,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1941. [2020-09-25 11:14:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1941 states. [2020-09-25 11:14:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2299 transitions. [2020-09-25 11:14:06,247 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2299 transitions. Word has length 211 [2020-09-25 11:14:06,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:14:06,248 INFO L479 AbstractCegarLoop]: Abstraction has 1941 states and 2299 transitions. [2020-09-25 11:14:06,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:14:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2299 transitions. [2020-09-25 11:14:06,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-09-25 11:14:06,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:14:06,258 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:14:06,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:14:06,258 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:14:06,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:14:06,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1114180569, now seen corresponding path program 1 times [2020-09-25 11:14:06,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:14:06,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305378895] [2020-09-25 11:14:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:14:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:14:06,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:14:06,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking...