/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 SequenceOfStatements --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 --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/simple-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:34:49,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:34:49,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:34:49,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:34:49,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:34:49,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:34:49,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:34:49,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:34:49,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:34:49,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:34:49,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:34:49,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:34:49,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:34:49,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:34:49,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:34:49,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:34:49,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:34:49,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:34:49,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:34:49,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:34:49,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:34:49,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:34:49,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:34:49,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:34:49,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:34:49,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:34:49,285 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:34:49,286 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:34:49,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:34:49,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:34:49,288 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:34:49,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:34:49,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:34:49,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:34:49,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:34:49,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:34:49,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:34:49,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:34:49,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:34:49,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:34:49,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:34:49,295 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 [2020-10-14 23:34:49,318 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:34:49,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:34:49,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:34:49,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:34:49,320 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:34:49,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:34:49,320 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:34:49,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:34:49,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:34:49,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:34:49,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:34:49,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:34:49,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:34:49,325 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:34:49,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:34:49,325 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:34:49,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:34:49,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:34:49,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:34:49,326 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:34:49,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:34:49,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:34:49,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:34:49,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:34:49,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:34:49,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:34:49,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:34:49,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:34:49,331 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:34:49,331 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 -> SequenceOfStatements 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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=true; [2020-10-14 23:34:49,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:34:49,646 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:34:49,650 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:34:49,651 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:34:49,652 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:34:49,653 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple-2.i [2020-10-14 23:34:49,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65ae62654/6c28a318b9c849b1aed99ae93e55356f/FLAG341bba337 [2020-10-14 23:34:50,340 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:34:50,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/simple-2.i [2020-10-14 23:34:50,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65ae62654/6c28a318b9c849b1aed99ae93e55356f/FLAG341bba337 [2020-10-14 23:34:50,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/65ae62654/6c28a318b9c849b1aed99ae93e55356f [2020-10-14 23:34:50,575 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:34:50,576 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:34:50,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:34:50,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:34:50,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:34:50,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:34:50" (1/1) ... [2020-10-14 23:34:50,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ca24e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:50, skipping insertion in model container [2020-10-14 23:34:50,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:34:50" (1/1) ... [2020-10-14 23:34:50,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:34:50,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:34:51,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:34:51,044 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:34:51,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:34:51,175 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:34:51,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:51 WrapperNode [2020-10-14 23:34:51,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:34:51,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:34:51,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:34:51,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:34:51,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:51" (1/1) ... [2020-10-14 23:34:51,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:51" (1/1) ... [2020-10-14 23:34:51,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:51" (1/1) ... [2020-10-14 23:34:51,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:51" (1/1) ... [2020-10-14 23:34:51,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:51" (1/1) ... [2020-10-14 23:34:51,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:51" (1/1) ... [2020-10-14 23:34:51,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:51" (1/1) ... [2020-10-14 23:34:51,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:34:51,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:34:51,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:34:51,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:34:51,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:51" (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 [2020-10-14 23:34:51,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:34:51,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:34:51,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 23:34:51,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 23:34:51,323 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-14 23:34:51,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-14 23:34:51,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-14 23:34:51,324 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 23:34:51,324 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:34:51,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:34:51,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:34:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 23:34:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 23:34:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 23:34:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 23:34:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 23:34:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 23:34:51,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 23:34:51,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 23:34:51,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 23:34:51,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 23:34:51,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 23:34:51,326 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 23:34:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 23:34:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 23:34:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 23:34:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 23:34:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 23:34:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 23:34:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-14 23:34:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-14 23:34:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-14 23:34:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 23:34:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 23:34:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 23:34:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 23:34:51,328 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 23:34:51,329 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 23:34:51,329 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 23:34:51,329 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 23:34:51,329 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 23:34:51,329 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 23:34:51,329 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 23:34:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 23:34:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 23:34:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 23:34:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 23:34:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 23:34:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 23:34:51,330 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 23:34:51,331 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 23:34:51,331 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 23:34:51,331 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 23:34:51,331 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 23:34:51,331 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 23:34:51,331 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 23:34:51,332 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 23:34:51,332 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 23:34:51,332 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 23:34:51,332 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 23:34:51,332 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 23:34:51,332 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 23:34:51,332 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 23:34:51,332 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 23:34:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 23:34:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 23:34:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 23:34:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 23:34:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 23:34:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 23:34:51,333 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 23:34:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 23:34:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 23:34:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 23:34:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 23:34:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 23:34:51,334 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 23:34:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 23:34:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 23:34:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 23:34:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 23:34:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 23:34:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 23:34:51,335 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 23:34:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 23:34:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 23:34:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 23:34:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 23:34:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 23:34:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 23:34:51,336 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 23:34:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 23:34:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 23:34:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 23:34:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 23:34:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 23:34:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 23:34:51,337 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 23:34:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 23:34:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 23:34:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 23:34:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 23:34:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 23:34:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 23:34:51,338 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 23:34:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 23:34:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 23:34:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 23:34:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 23:34:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 23:34:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 23:34:51,339 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 23:34:51,340 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 23:34:51,340 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 23:34:51,340 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 23:34:51,340 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 23:34:51,340 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 23:34:51,340 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 23:34:51,340 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 23:34:51,341 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:34:51,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 23:34:51,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:34:51,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 23:34:51,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 23:34:51,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:34:51,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:34:51,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:34:51,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:34:51,669 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 23:34:51,810 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:34:51,810 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 23:34:51,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:34:51 BoogieIcfgContainer [2020-10-14 23:34:51,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:34:51,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:34:51,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:34:51,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:34:51,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:34:50" (1/3) ... [2020-10-14 23:34:51,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1feba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:34:51, skipping insertion in model container [2020-10-14 23:34:51,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:34:51" (2/3) ... [2020-10-14 23:34:51,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1feba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:34:51, skipping insertion in model container [2020-10-14 23:34:51,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:34:51" (3/3) ... [2020-10-14 23:34:51,827 INFO L109 eAbstractionObserver]: Analyzing ICFG simple-2.i [2020-10-14 23:34:51,838 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:34:51,846 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:34:51,862 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:34:51,889 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:34:51,889 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:34:51,889 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:34:51,890 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:34:51,890 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:34:51,890 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:34:51,891 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:34:51,891 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:34:51,912 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-14 23:34:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 23:34:51,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:51,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:51,921 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:51,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:51,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1710443637, now seen corresponding path program 1 times [2020-10-14 23:34:51,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:51,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720004915] [2020-10-14 23:34:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:52,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:52,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:52,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:52,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 23:34:52,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:34:52,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-14 23:34:52,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:52,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:52,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:34:52,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:34:52,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 23:34:52,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-14 23:34:52,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:52,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:52,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:52,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:52,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:52,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 23:34:52,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:52,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:52,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:52,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:52,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:52,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:52,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720004915] [2020-10-14 23:34:52,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:34:52,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:34:52,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393981333] [2020-10-14 23:34:52,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:34:52,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:52,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:34:52,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:34:52,556 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-10-14 23:34:52,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:52,723 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2020-10-14 23:34:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:34:52,725 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-14 23:34:52,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:52,734 INFO L225 Difference]: With dead ends: 58 [2020-10-14 23:34:52,734 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 23:34:52,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:34:52,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 23:34:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-10-14 23:34:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 23:34:52,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-14 23:34:52,779 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 13 [2020-10-14 23:34:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:52,779 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-14 23:34:52,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:34:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-14 23:34:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:34:52,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:52,781 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:52,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:34:52,781 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:52,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:52,782 INFO L82 PathProgramCache]: Analyzing trace with hash 714847529, now seen corresponding path program 1 times [2020-10-14 23:34:52,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:52,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986172618] [2020-10-14 23:34:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:52,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:52,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:52,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:34:52,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:52,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-14 23:34:52,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:52,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:52,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:34:52,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:34:52,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:34:52,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:53,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:53,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:53,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:53,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:53,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:53,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:34:53,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:53,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:53,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:53,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:53,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986172618] [2020-10-14 23:34:53,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:53,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:34:53,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16365154] [2020-10-14 23:34:53,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:34:53,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:53,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:34:53,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:34:53,035 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-14 23:34:53,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:53,121 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-14 23:34:53,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:34:53,122 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-14 23:34:53,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:53,123 INFO L225 Difference]: With dead ends: 37 [2020-10-14 23:34:53,123 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 23:34:53,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:34:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 23:34:53,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2020-10-14 23:34:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 23:34:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-14 23:34:53,130 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-14 23:34:53,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:53,130 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-14 23:34:53,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:34:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-14 23:34:53,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:34:53,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:53,131 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:53,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:34:53,132 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:53,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:53,132 INFO L82 PathProgramCache]: Analyzing trace with hash -158216428, now seen corresponding path program 1 times [2020-10-14 23:34:53,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:53,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620104076] [2020-10-14 23:34:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:53,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:53,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:53,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:34:53,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:53,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-14 23:34:53,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:53,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:53,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:34:53,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:53,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:34:53,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:53,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:53,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:53,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:53,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:53,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:53,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:34:53,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:53,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:53,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:53,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:53,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:53,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:53,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620104076] [2020-10-14 23:34:53,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:53,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:34:53,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789994493] [2020-10-14 23:34:53,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:34:53,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:53,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:34:53,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:34:53,379 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-10-14 23:34:53,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:53,635 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-14 23:34:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:34:53,636 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-14 23:34:53,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:53,637 INFO L225 Difference]: With dead ends: 37 [2020-10-14 23:34:53,637 INFO L226 Difference]: Without dead ends: 35 [2020-10-14 23:34:53,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:34:53,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-14 23:34:53,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-10-14 23:34:53,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 23:34:53,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-14 23:34:53,644 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2020-10-14 23:34:53,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:53,645 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-14 23:34:53,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:34:53,645 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-14 23:34:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:34:53,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:53,646 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:53,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:34:53,646 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:53,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:53,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1841664542, now seen corresponding path program 1 times [2020-10-14 23:34:53,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:53,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865371037] [2020-10-14 23:34:53,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:53,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:53,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:53,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:34:53,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:53,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-14 23:34:53,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:53,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:53,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:34:53,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:53,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:34:53,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:53,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:53,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:53,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:53,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:53,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:53,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:34:53,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:53,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:53,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:53,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:53,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:53,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:53,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865371037] [2020-10-14 23:34:53,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:53,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:34:53,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011905037] [2020-10-14 23:34:53,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:34:53,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:53,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:34:53,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:34:53,958 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 10 states. [2020-10-14 23:34:54,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:54,202 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-14 23:34:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:34:54,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-14 23:34:54,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:54,204 INFO L225 Difference]: With dead ends: 40 [2020-10-14 23:34:54,204 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 23:34:54,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:34:54,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 23:34:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2020-10-14 23:34:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 23:34:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-14 23:34:54,211 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-10-14 23:34:54,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:54,212 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-14 23:34:54,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:34:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-14 23:34:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:34:54,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:54,213 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:54,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:34:54,214 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:54,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:54,214 INFO L82 PathProgramCache]: Analyzing trace with hash -2100679301, now seen corresponding path program 2 times [2020-10-14 23:34:54,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:54,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274652130] [2020-10-14 23:34:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:54,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:54,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:54,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:34:54,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:54,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-14 23:34:54,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:54,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:54,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:34:54,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:54,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:34:54,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:54,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:54,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:54,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:54,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:54,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:54,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:34:54,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:54,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:54,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:54,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:54,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:54,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:54,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274652130] [2020-10-14 23:34:54,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:54,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:34:54,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037823922] [2020-10-14 23:34:54,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:34:54,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:54,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:34:54,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:34:54,613 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 11 states. [2020-10-14 23:34:54,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:54,804 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-14 23:34:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:34:54,805 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-14 23:34:54,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:54,806 INFO L225 Difference]: With dead ends: 35 [2020-10-14 23:34:54,806 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 23:34:54,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:34:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 23:34:54,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-14 23:34:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 23:34:54,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-14 23:34:54,814 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 22 [2020-10-14 23:34:54,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:54,815 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-14 23:34:54,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:34:54,815 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-14 23:34:54,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:34:54,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:54,816 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:54,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:34:54,817 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:54,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:54,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1111313324, now seen corresponding path program 2 times [2020-10-14 23:34:54,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:54,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925182595] [2020-10-14 23:34:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:54,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:55,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:55,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:34:55,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:55,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-14 23:34:55,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:55,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:55,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:34:55,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:55,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:34:55,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:55,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:55,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:55,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:55,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:55,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:55,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 23:34:55,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:55,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:55,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:55,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:55,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:55,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:55,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925182595] [2020-10-14 23:34:55,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:55,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:34:55,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412606812] [2020-10-14 23:34:55,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:34:55,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:55,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:34:55,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:34:55,418 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2020-10-14 23:34:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:55,737 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-14 23:34:55,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:34:55,739 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-14 23:34:55,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:55,740 INFO L225 Difference]: With dead ends: 42 [2020-10-14 23:34:55,740 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 23:34:55,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:34:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 23:34:55,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-14 23:34:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 23:34:55,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-14 23:34:55,752 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2020-10-14 23:34:55,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:55,753 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-14 23:34:55,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:34:55,758 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-14 23:34:55,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:34:55,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:55,760 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:55,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:34:55,762 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:55,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:55,762 INFO L82 PathProgramCache]: Analyzing trace with hash 636232219, now seen corresponding path program 3 times [2020-10-14 23:34:55,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:55,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575114302] [2020-10-14 23:34:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:55,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:56,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:56,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:34:56,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:56,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-14 23:34:56,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:56,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:56,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:34:56,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:56,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:34:56,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:56,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:56,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:56,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:56,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:56,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:56,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:34:56,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:56,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:56,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:56,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:56,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:56,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:56,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575114302] [2020-10-14 23:34:56,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:56,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:34:56,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887752333] [2020-10-14 23:34:56,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:34:56,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:56,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:34:56,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:34:56,572 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2020-10-14 23:34:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:56,967 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-14 23:34:56,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:34:56,968 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-14 23:34:56,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:56,969 INFO L225 Difference]: With dead ends: 42 [2020-10-14 23:34:56,969 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 23:34:56,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:34:56,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 23:34:56,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-10-14 23:34:56,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 23:34:56,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-14 23:34:56,979 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2020-10-14 23:34:56,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:56,979 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-14 23:34:56,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:34:56,980 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-14 23:34:56,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:34:56,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:56,981 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:56,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:34:56,982 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:56,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:56,982 INFO L82 PathProgramCache]: Analyzing trace with hash 308177275, now seen corresponding path program 4 times [2020-10-14 23:34:56,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:56,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410351038] [2020-10-14 23:34:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:57,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:57,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:57,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:34:57,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:57,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-14 23:34:57,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:57,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:57,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:34:57,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:57,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:34:57,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:57,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:57,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:57,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:57,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:57,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:57,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:34:57,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:57,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:57,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:57,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:57,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:57,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:57,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410351038] [2020-10-14 23:34:57,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:57,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:34:57,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444901171] [2020-10-14 23:34:57,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:34:57,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:57,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:34:57,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:34:57,579 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 13 states. [2020-10-14 23:34:58,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:58,004 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-14 23:34:58,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:34:58,004 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-14 23:34:58,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:58,005 INFO L225 Difference]: With dead ends: 45 [2020-10-14 23:34:58,005 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 23:34:58,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:34:58,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 23:34:58,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-10-14 23:34:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 23:34:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-14 23:34:58,015 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 28 [2020-10-14 23:34:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:58,015 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-14 23:34:58,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:34:58,016 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-14 23:34:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:34:58,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:58,021 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:58,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:34:58,022 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:58,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:58,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1690767828, now seen corresponding path program 5 times [2020-10-14 23:34:58,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:58,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327383387] [2020-10-14 23:34:58,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:58,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:58,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:58,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:34:58,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:58,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-14 23:34:58,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:58,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:58,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:34:58,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:34:58,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 23:34:58,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:58,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:34:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:58,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:34:58,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:34:58,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:34:58,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:34:58,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:34:58,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:34:58,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:34:58,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:34:58,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:34:58,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:34:58,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:34:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:34:59,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327383387] [2020-10-14 23:34:59,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:34:59,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:34:59,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490445789] [2020-10-14 23:34:59,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:34:59,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:34:59,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:34:59,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:34:59,016 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 14 states. [2020-10-14 23:34:59,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:34:59,675 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-10-14 23:34:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:34:59,680 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-14 23:34:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:34:59,681 INFO L225 Difference]: With dead ends: 55 [2020-10-14 23:34:59,681 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 23:34:59,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:34:59,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 23:34:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2020-10-14 23:34:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 23:34:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-14 23:34:59,695 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 29 [2020-10-14 23:34:59,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:34:59,696 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-14 23:34:59,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:34:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-14 23:34:59,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:34:59,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:34:59,697 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:34:59,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:34:59,699 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:34:59,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:34:59,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1726061029, now seen corresponding path program 6 times [2020-10-14 23:34:59,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:34:59,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889666204] [2020-10-14 23:34:59,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:34:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:34:59,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:00,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:00,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:35:00,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:00,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-14 23:35:00,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:00,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:00,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:35:00,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:00,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:35:00,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:00,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:00,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:00,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:00,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:00,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:00,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 23:35:00,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:00,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:00,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:00,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:00,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:00,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:00,419 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:00,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889666204] [2020-10-14 23:35:00,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:00,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:35:00,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616346425] [2020-10-14 23:35:00,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:35:00,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:00,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:35:00,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:35:00,424 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 13 states. [2020-10-14 23:35:00,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:00,778 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-14 23:35:00,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:35:00,778 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-14 23:35:00,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:00,779 INFO L225 Difference]: With dead ends: 57 [2020-10-14 23:35:00,779 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 23:35:00,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:35:00,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 23:35:00,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-14 23:35:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 23:35:00,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-14 23:35:00,787 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2020-10-14 23:35:00,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:00,788 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-14 23:35:00,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:35:00,788 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-14 23:35:00,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:35:00,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:00,789 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:00,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:35:00,789 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:00,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:00,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1707265246, now seen corresponding path program 7 times [2020-10-14 23:35:00,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:00,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095797104] [2020-10-14 23:35:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:00,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:01,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:01,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:35:01,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:01,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-14 23:35:01,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:01,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:01,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:35:01,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:01,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:35:01,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:01,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:01,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:01,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:01,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:01,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:01,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:01,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:01,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:01,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:01,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:01,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:01,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:01,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095797104] [2020-10-14 23:35:01,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:01,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:35:01,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586694449] [2020-10-14 23:35:01,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:35:01,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:01,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:35:01,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:35:01,698 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 15 states. [2020-10-14 23:35:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:02,470 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-14 23:35:02,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:35:02,471 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-14 23:35:02,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:02,473 INFO L225 Difference]: With dead ends: 49 [2020-10-14 23:35:02,473 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 23:35:02,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:35:02,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 23:35:02,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-14 23:35:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:35:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-14 23:35:02,480 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2020-10-14 23:35:02,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:02,480 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-14 23:35:02,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:35:02,480 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-14 23:35:02,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:35:02,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:02,481 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:02,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:35:02,481 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:02,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:02,482 INFO L82 PathProgramCache]: Analyzing trace with hash -658408179, now seen corresponding path program 8 times [2020-10-14 23:35:02,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:02,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83677350] [2020-10-14 23:35:02,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:02,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:02,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:02,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:35:02,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:02,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-14 23:35:02,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:02,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:02,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:35:02,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:02,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 23:35:02,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:03,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:03,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:03,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:03,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:03,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:03,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:03,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:03,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:03,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:03,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:03,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:03,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:03,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83677350] [2020-10-14 23:35:03,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:03,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:35:03,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589390637] [2020-10-14 23:35:03,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:35:03,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:03,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:35:03,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:35:03,434 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-14 23:35:04,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:04,035 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-14 23:35:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:35:04,036 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-14 23:35:04,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:04,036 INFO L225 Difference]: With dead ends: 49 [2020-10-14 23:35:04,037 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 23:35:04,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:35:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 23:35:04,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-14 23:35:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:35:04,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-14 23:35:04,044 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 33 [2020-10-14 23:35:04,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:04,044 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-14 23:35:04,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:35:04,045 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-14 23:35:04,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 23:35:04,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:04,045 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:04,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:35:04,046 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:04,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:04,046 INFO L82 PathProgramCache]: Analyzing trace with hash -131406060, now seen corresponding path program 9 times [2020-10-14 23:35:04,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:04,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720070210] [2020-10-14 23:35:04,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:04,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:04,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:04,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:35:04,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:04,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 424 [2020-10-14 23:35:04,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:04,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:04,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:35:04,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:04,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 23:35:04,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:05,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:05,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:05,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:05,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:05,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:05,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:05,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:05,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:05,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:05,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:05,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:05,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:05,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720070210] [2020-10-14 23:35:05,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:05,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:35:05,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776349961] [2020-10-14 23:35:05,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:35:05,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:05,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:35:05,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:35:05,053 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-14 23:35:05,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:05,893 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-14 23:35:05,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:35:05,894 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-14 23:35:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:05,894 INFO L225 Difference]: With dead ends: 54 [2020-10-14 23:35:05,895 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 23:35:05,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:35:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 23:35:05,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2020-10-14 23:35:05,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 23:35:05,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-14 23:35:05,907 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2020-10-14 23:35:05,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:05,908 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-14 23:35:05,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:35:05,908 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-14 23:35:05,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:35:05,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:05,909 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:05,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:35:05,909 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:05,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:05,909 INFO L82 PathProgramCache]: Analyzing trace with hash 482398537, now seen corresponding path program 10 times [2020-10-14 23:35:05,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:05,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491710437] [2020-10-14 23:35:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:05,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:06,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:06,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:35:06,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:06,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 534 [2020-10-14 23:35:06,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:06,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:06,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:35:06,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:06,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:35:06,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:07,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:07,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:07,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:07,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:07,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:07,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:07,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:07,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:07,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:07,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:07,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:07,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:07,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491710437] [2020-10-14 23:35:07,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:07,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:35:07,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452792467] [2020-10-14 23:35:07,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:35:07,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:07,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:35:07,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:35:07,315 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 17 states. [2020-10-14 23:35:08,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:08,126 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-14 23:35:08,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:35:08,130 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-10-14 23:35:08,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:08,131 INFO L225 Difference]: With dead ends: 55 [2020-10-14 23:35:08,131 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 23:35:08,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:35:08,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 23:35:08,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2020-10-14 23:35:08,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 23:35:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-14 23:35:08,143 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 36 [2020-10-14 23:35:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:08,144 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-14 23:35:08,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:35:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-14 23:35:08,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:35:08,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:08,145 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:08,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:35:08,148 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:08,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:08,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1997908510, now seen corresponding path program 11 times [2020-10-14 23:35:08,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:08,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892642078] [2020-10-14 23:35:08,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:08,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:08,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:08,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:35:08,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:08,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-14 23:35:08,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:08,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:08,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:35:08,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:08,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 23:35:08,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:09,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:09,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:09,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:09,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:09,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:09,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:09,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:09,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:09,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:09,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:09,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:09,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:09,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892642078] [2020-10-14 23:35:09,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:09,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:35:09,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223398999] [2020-10-14 23:35:09,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:35:09,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:09,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:35:09,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:35:09,457 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 16 states. [2020-10-14 23:35:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:10,039 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-14 23:35:10,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:35:10,039 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-14 23:35:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:10,040 INFO L225 Difference]: With dead ends: 61 [2020-10-14 23:35:10,040 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 23:35:10,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:35:10,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 23:35:10,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-14 23:35:10,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 23:35:10,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-14 23:35:10,047 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2020-10-14 23:35:10,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:10,048 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-14 23:35:10,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:35:10,048 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-14 23:35:10,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 23:35:10,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:10,049 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:10,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:35:10,049 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:10,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:10,050 INFO L82 PathProgramCache]: Analyzing trace with hash 179061645, now seen corresponding path program 12 times [2020-10-14 23:35:10,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:10,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307801402] [2020-10-14 23:35:10,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:10,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:10,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:10,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 23:35:10,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:10,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 578 [2020-10-14 23:35:10,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:10,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:10,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:35:10,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:10,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 23:35:10,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:11,154 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-14 23:35:11,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:11,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:11,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:11,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:11,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:11,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:11,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:11,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:11,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:11,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:11,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:11,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:11,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307801402] [2020-10-14 23:35:11,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:11,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:35:11,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914186173] [2020-10-14 23:35:11,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:35:11,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:11,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:35:11,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:35:11,696 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2020-10-14 23:35:12,295 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-14 23:35:12,614 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2020-10-14 23:35:13,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:13,087 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-14 23:35:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:35:13,087 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-14 23:35:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:13,088 INFO L225 Difference]: With dead ends: 61 [2020-10-14 23:35:13,088 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 23:35:13,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:35:13,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 23:35:13,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-10-14 23:35:13,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 23:35:13,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-14 23:35:13,096 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2020-10-14 23:35:13,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:13,097 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-14 23:35:13,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:35:13,097 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-14 23:35:13,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:35:13,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:13,098 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:13,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:35:13,098 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:13,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:13,098 INFO L82 PathProgramCache]: Analyzing trace with hash 80902857, now seen corresponding path program 13 times [2020-10-14 23:35:13,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:13,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957203426] [2020-10-14 23:35:13,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:13,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:13,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:13,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:35:13,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:13,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-14 23:35:13,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:13,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:13,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:35:13,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:13,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:35:13,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:14,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:14,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:14,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:14,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:14,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:14,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:14,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:14,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:14,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:14,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:14,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:14,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:14,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957203426] [2020-10-14 23:35:14,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:14,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:35:14,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795473628] [2020-10-14 23:35:14,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:35:14,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:14,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:35:14,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:35:14,721 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 19 states. [2020-10-14 23:35:15,092 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-14 23:35:15,351 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-10-14 23:35:15,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:15,888 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-14 23:35:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:35:15,889 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-14 23:35:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:15,889 INFO L225 Difference]: With dead ends: 64 [2020-10-14 23:35:15,889 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 23:35:15,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:35:15,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 23:35:15,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-14 23:35:15,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:35:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-14 23:35:15,901 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 42 [2020-10-14 23:35:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:15,901 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-14 23:35:15,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:35:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-14 23:35:15,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 23:35:15,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:15,905 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:15,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:35:15,906 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:15,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:15,906 INFO L82 PathProgramCache]: Analyzing trace with hash 197704582, now seen corresponding path program 14 times [2020-10-14 23:35:15,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:15,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448219617] [2020-10-14 23:35:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:15,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:16,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:16,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 23:35:16,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:16,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 690 [2020-10-14 23:35:16,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:16,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:16,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:35:16,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:16,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 23:35:16,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:17,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:17,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:17,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:17,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:17,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:17,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:17,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:17,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:17,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:17,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448219617] [2020-10-14 23:35:17,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:17,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:35:17,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268934266] [2020-10-14 23:35:17,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:35:17,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:17,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:35:17,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:35:17,639 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2020-10-14 23:35:18,145 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2020-10-14 23:35:18,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:18,496 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-14 23:35:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:35:18,497 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2020-10-14 23:35:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:18,497 INFO L225 Difference]: With dead ends: 65 [2020-10-14 23:35:18,498 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 23:35:18,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:35:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 23:35:18,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-10-14 23:35:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:35:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-14 23:35:18,514 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 43 [2020-10-14 23:35:18,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:18,514 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-14 23:35:18,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:35:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-14 23:35:18,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 23:35:18,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:18,515 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:18,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:35:18,516 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:18,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:18,516 INFO L82 PathProgramCache]: Analyzing trace with hash 705178125, now seen corresponding path program 15 times [2020-10-14 23:35:18,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:18,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913547322] [2020-10-14 23:35:18,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:18,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:19,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:19,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 23:35:19,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:19,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 820 [2020-10-14 23:35:19,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:19,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:19,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:35:19,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:19,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:35:19,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:20,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:20,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:20,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:20,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:20,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:20,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:20,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:20,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:20,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:20,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:20,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:20,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:20,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913547322] [2020-10-14 23:35:20,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:20,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:35:20,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279749657] [2020-10-14 23:35:20,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:35:20,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:20,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:35:20,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:35:20,327 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 19 states. [2020-10-14 23:35:20,946 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-10-14 23:35:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:21,465 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-14 23:35:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:35:21,466 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-14 23:35:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:21,466 INFO L225 Difference]: With dead ends: 71 [2020-10-14 23:35:21,466 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 23:35:21,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:35:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 23:35:21,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-14 23:35:21,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:35:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-14 23:35:21,474 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 45 [2020-10-14 23:35:21,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:21,474 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-14 23:35:21,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:35:21,474 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-14 23:35:21,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:35:21,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:21,475 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:21,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:35:21,475 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:21,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:21,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1421857840, now seen corresponding path program 16 times [2020-10-14 23:35:21,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:21,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601351085] [2020-10-14 23:35:21,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:21,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:22,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:22,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:35:22,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:22,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 775 [2020-10-14 23:35:22,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:22,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:22,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:35:22,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:22,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:35:22,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:22,675 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-14 23:35:23,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:23,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:23,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:23,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:23,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:23,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:23,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:23,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:23,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:23,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:23,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:23,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:23,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601351085] [2020-10-14 23:35:23,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:23,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:35:23,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499969993] [2020-10-14 23:35:23,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:35:23,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:23,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:35:23,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:35:23,337 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 21 states. [2020-10-14 23:35:24,261 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 79 [2020-10-14 23:35:24,711 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2020-10-14 23:35:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:25,299 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-14 23:35:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:35:25,300 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-14 23:35:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:25,301 INFO L225 Difference]: With dead ends: 71 [2020-10-14 23:35:25,301 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 23:35:25,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:35:25,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 23:35:25,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-14 23:35:25,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:35:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-14 23:35:25,312 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 46 [2020-10-14 23:35:25,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:25,313 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-14 23:35:25,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:35:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-14 23:35:25,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 23:35:25,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:25,315 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:25,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:35:25,315 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:25,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:25,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1604256582, now seen corresponding path program 17 times [2020-10-14 23:35:25,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:25,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729297427] [2020-10-14 23:35:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:25,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:26,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:26,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 23:35:26,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:26,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1185 [2020-10-14 23:35:26,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:26,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:26,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:35:26,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:26,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 23:35:26,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:35:27,276 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-14 23:35:27,622 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-14 23:35:27,861 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-14 23:35:28,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:28,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:28,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:28,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:28,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:28,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:28,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:28,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:28,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:28,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:28,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:28,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:28,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729297427] [2020-10-14 23:35:28,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:28,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:35:28,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128213025] [2020-10-14 23:35:28,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:35:28,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:28,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:35:28,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:35:28,394 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2020-10-14 23:35:28,815 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-14 23:35:29,127 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-14 23:35:29,512 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2020-10-14 23:35:30,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:30,306 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-14 23:35:30,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:35:30,306 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-14 23:35:30,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:30,307 INFO L225 Difference]: With dead ends: 74 [2020-10-14 23:35:30,307 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 23:35:30,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:35:30,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 23:35:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-14 23:35:30,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 23:35:30,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-14 23:35:30,315 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-10-14 23:35:30,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:30,316 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-14 23:35:30,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:35:30,316 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-14 23:35:30,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:35:30,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:30,316 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:30,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:35:30,317 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:30,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:30,317 INFO L82 PathProgramCache]: Analyzing trace with hash -771481065, now seen corresponding path program 18 times [2020-10-14 23:35:30,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:30,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117280397] [2020-10-14 23:35:30,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:30,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:31,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:31,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:35:31,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:31,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-10-14 23:35:31,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:31,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:31,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:35:31,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:31,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:35:31,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:31,841 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-14 23:35:32,044 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-14 23:35:32,322 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-14 23:35:32,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:32,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:32,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:32,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:32,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:32,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:32,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:32,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:32,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:32,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:32,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:32,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:32,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117280397] [2020-10-14 23:35:32,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:32,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:35:32,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631258543] [2020-10-14 23:35:32,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:35:32,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:32,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:35:32,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:35:32,775 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 23 states. [2020-10-14 23:35:33,591 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-14 23:35:33,928 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2020-10-14 23:35:34,252 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2020-10-14 23:35:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:34,917 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2020-10-14 23:35:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:35:34,921 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-14 23:35:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:34,922 INFO L225 Difference]: With dead ends: 91 [2020-10-14 23:35:34,922 INFO L226 Difference]: Without dead ends: 89 [2020-10-14 23:35:34,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:35:34,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-14 23:35:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2020-10-14 23:35:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 23:35:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-14 23:35:34,931 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 50 [2020-10-14 23:35:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:34,931 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-14 23:35:34,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:35:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-14 23:35:34,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:35:34,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:34,932 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:34,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:35:34,933 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:34,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:34,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1983417232, now seen corresponding path program 19 times [2020-10-14 23:35:34,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:34,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264777195] [2020-10-14 23:35:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:35,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:35,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:35,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:35:35,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:35,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-10-14 23:35:35,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:35,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:35,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:35:35,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:35,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 23:35:35,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:36,709 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-14 23:35:36,954 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-14 23:35:37,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:37,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:37,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:37,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:37,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:37,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:37,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:37,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:37,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:37,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:37,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:37,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:37,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264777195] [2020-10-14 23:35:37,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:37,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:35:37,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102965097] [2020-10-14 23:35:37,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:35:37,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:37,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:35:37,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:35:37,482 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 22 states. [2020-10-14 23:35:37,926 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2020-10-14 23:35:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:38,572 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2020-10-14 23:35:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:35:38,573 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-14 23:35:38,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:38,574 INFO L225 Difference]: With dead ends: 87 [2020-10-14 23:35:38,574 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 23:35:38,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:35:38,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 23:35:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-10-14 23:35:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 23:35:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-14 23:35:38,582 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2020-10-14 23:35:38,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:38,582 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-14 23:35:38,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:35:38,582 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-14 23:35:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 23:35:38,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:38,583 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:38,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:35:38,583 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:38,583 INFO L82 PathProgramCache]: Analyzing trace with hash -817588225, now seen corresponding path program 20 times [2020-10-14 23:35:38,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:38,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869124074] [2020-10-14 23:35:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:38,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:39,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:39,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 23:35:39,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:39,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1339 [2020-10-14 23:35:39,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:39,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:39,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:35:39,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:39,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 23:35:39,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:40,600 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-14 23:35:40,912 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-14 23:35:41,075 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-10-14 23:35:41,464 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-10-14 23:35:41,672 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2020-10-14 23:35:41,940 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2020-10-14 23:35:42,126 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-14 23:35:42,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:42,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:42,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:42,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:42,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:42,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:42,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:42,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:42,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:42,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:42,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:42,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:42,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869124074] [2020-10-14 23:35:42,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:42,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:35:42,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914600419] [2020-10-14 23:35:42,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:35:42,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:42,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:35:42,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:35:42,618 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 24 states. [2020-10-14 23:35:43,630 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-14 23:35:43,809 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-14 23:35:44,099 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-14 23:35:44,314 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-14 23:35:44,743 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 105 [2020-10-14 23:35:45,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:45,627 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-14 23:35:45,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:35:45,629 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-14 23:35:45,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:45,630 INFO L225 Difference]: With dead ends: 78 [2020-10-14 23:35:45,630 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 23:35:45,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=166, Invalid=1814, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:35:45,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 23:35:45,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-10-14 23:35:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 23:35:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-14 23:35:45,639 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 53 [2020-10-14 23:35:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:45,639 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-14 23:35:45,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:35:45,639 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-14 23:35:45,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 23:35:45,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:45,640 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:45,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:35:45,641 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:45,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:45,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1460741246, now seen corresponding path program 21 times [2020-10-14 23:35:45,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:45,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178785136] [2020-10-14 23:35:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:45,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:46,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:46,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 23:35:46,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:46,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1219 [2020-10-14 23:35:46,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:46,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:46,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:35:46,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:46,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:35:46,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:47,689 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-14 23:35:47,914 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-14 23:35:48,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:48,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:48,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:48,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:48,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:48,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:48,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:48,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:48,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:48,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:48,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:48,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:48,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178785136] [2020-10-14 23:35:48,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:48,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:35:48,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163277835] [2020-10-14 23:35:48,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:35:48,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:48,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:35:48,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:35:48,750 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2020-10-14 23:35:49,546 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2020-10-14 23:35:49,807 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 84 [2020-10-14 23:35:50,095 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 77 [2020-10-14 23:35:50,402 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 82 [2020-10-14 23:35:50,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:50,918 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-14 23:35:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:35:50,919 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-14 23:35:50,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:50,920 INFO L225 Difference]: With dead ends: 79 [2020-10-14 23:35:50,921 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 23:35:50,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:35:50,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 23:35:50,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-14 23:35:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 23:35:50,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-14 23:35:50,931 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 54 [2020-10-14 23:35:50,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:50,932 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-14 23:35:50,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:35:50,932 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-14 23:35:50,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 23:35:50,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:50,933 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:50,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:35:50,933 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:50,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:50,933 INFO L82 PathProgramCache]: Analyzing trace with hash -6457065, now seen corresponding path program 22 times [2020-10-14 23:35:50,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:50,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142811260] [2020-10-14 23:35:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:51,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:52,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:52,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 23:35:52,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:52,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-10-14 23:35:52,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:52,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:52,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:35:52,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:52,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 23:35:52,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:52,668 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-14 23:35:53,005 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-14 23:35:53,351 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-14 23:35:53,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:53,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:53,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:53,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:53,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:53,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:35:53,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:53,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:53,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:53,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:53,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:53,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:53,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142811260] [2020-10-14 23:35:53,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:53,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:35:53,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327932637] [2020-10-14 23:35:53,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:35:53,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:53,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:35:53,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:35:53,949 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2020-10-14 23:35:54,964 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 87 [2020-10-14 23:35:55,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:35:55,867 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-14 23:35:55,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:35:55,868 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-14 23:35:55,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:35:55,869 INFO L225 Difference]: With dead ends: 84 [2020-10-14 23:35:55,869 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 23:35:55,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:35:55,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 23:35:55,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2020-10-14 23:35:55,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 23:35:55,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-14 23:35:55,881 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 56 [2020-10-14 23:35:55,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:35:55,881 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-14 23:35:55,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:35:55,881 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-14 23:35:55,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 23:35:55,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:35:55,882 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:35:55,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:35:55,883 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:35:55,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:35:55,883 INFO L82 PathProgramCache]: Analyzing trace with hash 338634808, now seen corresponding path program 23 times [2020-10-14 23:35:55,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:35:55,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524834079] [2020-10-14 23:35:55,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:35:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:56,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:57,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:57,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 23:35:57,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:57,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1216 [2020-10-14 23:35:57,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:57,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:57,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:35:57,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:35:57,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 23:35:57,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:57,693 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-14 23:35:57,911 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-14 23:35:58,189 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-14 23:35:58,463 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2020-10-14 23:35:59,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:35:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:35:59,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:35:59,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:35:59,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:35:59,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:35:59,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:35:59,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:35:59,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:35:59,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:35:59,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:35:59,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:35:59,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:35:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:35:59,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524834079] [2020-10-14 23:35:59,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:35:59,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:35:59,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187543428] [2020-10-14 23:35:59,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:35:59,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:35:59,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:35:59,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:35:59,276 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2020-10-14 23:36:00,147 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 77 [2020-10-14 23:36:00,575 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 87 [2020-10-14 23:36:01,011 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 95 [2020-10-14 23:36:01,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:01,911 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-14 23:36:01,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:36:01,911 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-14 23:36:01,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:01,912 INFO L225 Difference]: With dead ends: 104 [2020-10-14 23:36:01,912 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 23:36:01,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=169, Invalid=1723, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:36:01,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 23:36:01,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2020-10-14 23:36:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 23:36:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-14 23:36:01,923 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 57 [2020-10-14 23:36:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:01,923 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-14 23:36:01,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:36:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-14 23:36:01,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 23:36:01,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:01,923 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:01,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:36:01,924 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:01,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:01,924 INFO L82 PathProgramCache]: Analyzing trace with hash 915923199, now seen corresponding path program 24 times [2020-10-14 23:36:01,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:01,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748893599] [2020-10-14 23:36:01,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:02,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:02,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:02,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 23:36:02,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:02,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 859 [2020-10-14 23:36:02,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:02,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:02,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:36:02,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:02,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 23:36:02,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:03,189 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-14 23:36:03,570 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-14 23:36:03,725 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-14 23:36:03,945 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-10-14 23:36:04,221 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-14 23:36:04,362 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-14 23:36:05,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:05,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:05,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:05,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:05,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:05,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:05,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:05,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:05,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:05,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:05,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:05,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 7 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:05,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748893599] [2020-10-14 23:36:05,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:05,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:36:05,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888551990] [2020-10-14 23:36:05,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:36:05,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:05,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:36:05,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:36:05,095 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 25 states. [2020-10-14 23:36:05,742 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-14 23:36:06,107 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:36:06,559 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 88 [2020-10-14 23:36:07,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:07,373 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2020-10-14 23:36:07,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:36:07,375 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-14 23:36:07,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:07,376 INFO L225 Difference]: With dead ends: 97 [2020-10-14 23:36:07,376 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 23:36:07,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:36:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 23:36:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-14 23:36:07,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 23:36:07,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-14 23:36:07,386 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2020-10-14 23:36:07,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:07,386 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-14 23:36:07,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:36:07,387 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-14 23:36:07,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 23:36:07,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:07,387 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:07,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:36:07,388 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:07,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:07,388 INFO L82 PathProgramCache]: Analyzing trace with hash -603794882, now seen corresponding path program 25 times [2020-10-14 23:36:07,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:07,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266399343] [2020-10-14 23:36:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:07,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:08,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:08,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 23:36:08,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:08,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1090 [2020-10-14 23:36:08,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:08,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:08,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 23:36:08,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:08,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 23:36:08,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:08,994 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-14 23:36:09,246 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-14 23:36:09,394 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-14 23:36:09,671 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-14 23:36:10,052 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-14 23:36:10,263 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-10-14 23:36:10,462 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-14 23:36:11,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:11,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:11,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:11,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:11,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:11,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:11,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:11,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:11,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:11,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:11,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:11,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:11,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266399343] [2020-10-14 23:36:11,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:11,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:36:11,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495572898] [2020-10-14 23:36:11,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:36:11,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:11,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:36:11,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:36:11,122 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 27 states. [2020-10-14 23:36:11,973 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 78 [2020-10-14 23:36:12,153 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 23:36:12,411 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-14 23:36:12,643 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-14 23:36:12,953 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 98 [2020-10-14 23:36:13,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:13,929 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-14 23:36:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:36:13,930 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-14 23:36:13,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:13,931 INFO L225 Difference]: With dead ends: 88 [2020-10-14 23:36:13,931 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 23:36:13,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=171, Invalid=1899, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 23:36:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 23:36:13,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2020-10-14 23:36:13,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 23:36:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-14 23:36:13,945 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 60 [2020-10-14 23:36:13,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:13,945 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-14 23:36:13,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:36:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-14 23:36:13,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 23:36:13,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:13,946 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:13,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:36:13,946 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:13,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:13,946 INFO L82 PathProgramCache]: Analyzing trace with hash -998968335, now seen corresponding path program 26 times [2020-10-14 23:36:13,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:13,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965141928] [2020-10-14 23:36:13,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:14,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:15,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:15,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 23:36:15,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:15,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1385 [2020-10-14 23:36:15,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:15,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:15,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:36:15,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:15,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 23:36:15,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:15,957 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-14 23:36:16,214 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-14 23:36:16,514 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-14 23:36:16,673 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-10-14 23:36:16,888 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-10-14 23:36:17,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:17,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:17,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:17,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:17,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:17,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:17,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:17,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:17,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:17,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:17,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:17,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:17,827 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:36:17,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965141928] [2020-10-14 23:36:17,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:17,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:36:17,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136086420] [2020-10-14 23:36:17,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:36:17,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:17,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:36:17,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:36:17,829 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 27 states. [2020-10-14 23:36:18,652 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 77 [2020-10-14 23:36:18,841 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 23:36:19,053 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-14 23:36:19,308 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-14 23:36:19,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:19,942 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-14 23:36:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:36:19,943 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-14 23:36:19,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:19,944 INFO L225 Difference]: With dead ends: 89 [2020-10-14 23:36:19,944 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 23:36:19,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=156, Invalid=1566, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 23:36:19,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 23:36:19,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-14 23:36:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 23:36:19,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-14 23:36:19,955 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 61 [2020-10-14 23:36:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:19,956 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-14 23:36:19,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:36:19,956 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-14 23:36:19,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 23:36:19,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:19,957 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:19,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:36:19,957 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:19,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:19,957 INFO L82 PathProgramCache]: Analyzing trace with hash -325475720, now seen corresponding path program 27 times [2020-10-14 23:36:19,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:19,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30248822] [2020-10-14 23:36:19,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:20,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:21,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:21,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 23:36:21,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:21,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1553 [2020-10-14 23:36:21,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:21,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:21,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:36:21,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:21,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 23:36:21,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:22,363 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-14 23:36:22,655 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-14 23:36:22,827 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-14 23:36:23,086 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2020-10-14 23:36:23,276 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-14 23:36:23,472 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-14 23:36:23,650 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-14 23:36:24,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:24,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:24,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:24,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:24,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:24,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:24,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:24,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:24,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:24,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:24,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:24,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:24,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30248822] [2020-10-14 23:36:24,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:24,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 23:36:24,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180746713] [2020-10-14 23:36:24,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 23:36:24,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:24,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 23:36:24,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=700, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:36:24,489 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 28 states. [2020-10-14 23:36:25,589 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2020-10-14 23:36:26,056 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 78 [2020-10-14 23:36:26,573 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 90 [2020-10-14 23:36:26,835 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-14 23:36:27,183 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 104 [2020-10-14 23:36:28,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:28,571 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-14 23:36:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 23:36:28,572 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-14 23:36:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:28,573 INFO L225 Difference]: With dead ends: 94 [2020-10-14 23:36:28,573 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 23:36:28,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=185, Invalid=2467, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 23:36:28,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 23:36:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2020-10-14 23:36:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 23:36:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-14 23:36:28,589 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 63 [2020-10-14 23:36:28,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:28,589 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-14 23:36:28,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 23:36:28,589 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-14 23:36:28,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 23:36:28,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:28,590 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:28,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:36:28,591 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:28,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:28,591 INFO L82 PathProgramCache]: Analyzing trace with hash -432455707, now seen corresponding path program 28 times [2020-10-14 23:36:28,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:28,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851591592] [2020-10-14 23:36:28,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:28,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:29,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:29,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 23:36:29,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:29,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1248 [2020-10-14 23:36:29,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:29,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:29,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 23:36:29,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:29,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 23:36:29,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:30,604 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-14 23:36:30,832 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-14 23:36:31,028 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-14 23:36:31,282 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-10-14 23:36:31,455 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-14 23:36:31,799 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-10-14 23:36:31,991 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-10-14 23:36:32,174 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-14 23:36:33,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:33,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:33,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:33,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:33,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:33,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:33,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:33,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:33,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:33,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:33,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:33,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:33,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851591592] [2020-10-14 23:36:33,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:33,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 23:36:33,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710871420] [2020-10-14 23:36:33,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 23:36:33,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:33,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 23:36:33,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:36:33,087 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 29 states. [2020-10-14 23:36:33,914 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2020-10-14 23:36:34,303 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-14 23:36:34,502 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:36:34,775 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2020-10-14 23:36:34,986 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 23:36:35,343 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 102 [2020-10-14 23:36:35,726 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 107 [2020-10-14 23:36:36,143 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 111 [2020-10-14 23:36:36,725 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-14 23:36:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:37,350 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-14 23:36:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:36:37,351 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-14 23:36:37,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:37,352 INFO L225 Difference]: With dead ends: 117 [2020-10-14 23:36:37,352 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 23:36:37,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=204, Invalid=2346, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 23:36:37,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 23:36:37,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2020-10-14 23:36:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 23:36:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-10-14 23:36:37,366 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 64 [2020-10-14 23:36:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:37,366 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-10-14 23:36:37,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 23:36:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-10-14 23:36:37,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 23:36:37,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:37,367 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:37,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:36:37,367 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:37,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:37,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1793798142, now seen corresponding path program 29 times [2020-10-14 23:36:37,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:37,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148243933] [2020-10-14 23:36:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:37,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:38,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:38,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 23:36:38,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:38,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1219 [2020-10-14 23:36:38,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:38,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:38,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:36:38,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:38,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 23:36:38,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:39,171 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-14 23:36:39,411 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-14 23:36:39,743 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-14 23:36:39,877 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-14 23:36:40,106 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2020-10-14 23:36:40,264 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-14 23:36:40,437 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-14 23:36:41,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:41,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:41,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:41,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:41,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:41,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:41,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:41,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:41,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 8 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:41,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148243933] [2020-10-14 23:36:41,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:41,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 23:36:41,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325892007] [2020-10-14 23:36:41,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 23:36:41,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 23:36:41,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:36:41,420 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 28 states. [2020-10-14 23:36:41,954 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-14 23:36:42,343 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 23:36:42,799 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 23:36:43,012 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 23:36:43,336 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 98 [2020-10-14 23:36:44,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:44,419 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-10-14 23:36:44,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:36:44,420 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-14 23:36:44,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:44,421 INFO L225 Difference]: With dead ends: 107 [2020-10-14 23:36:44,421 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 23:36:44,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=141, Invalid=1839, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:36:44,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 23:36:44,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-10-14 23:36:44,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 23:36:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-14 23:36:44,436 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 66 [2020-10-14 23:36:44,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:44,436 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-14 23:36:44,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 23:36:44,436 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-14 23:36:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 23:36:44,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:44,437 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:44,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:36:44,437 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:44,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:44,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1618739057, now seen corresponding path program 30 times [2020-10-14 23:36:44,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:44,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428837118] [2020-10-14 23:36:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:44,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:46,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:46,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 23:36:46,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:46,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1658 [2020-10-14 23:36:46,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:46,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:46,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 23:36:46,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:46,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 23:36:46,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:46,884 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-14 23:36:47,265 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2020-10-14 23:36:47,417 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-14 23:36:47,674 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-10-14 23:36:47,850 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-14 23:36:48,144 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 93 [2020-10-14 23:36:48,574 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-14 23:36:49,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:36:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:49,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:49,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:49,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:36:49,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:49,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:36:49,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:49,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:49,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:36:49,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:36:49,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:36:49,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:36:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:36:49,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428837118] [2020-10-14 23:36:49,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:36:49,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 23:36:49,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546124811] [2020-10-14 23:36:49,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 23:36:49,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:36:49,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 23:36:49,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=801, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:36:49,423 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 30 states. [2020-10-14 23:36:50,249 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-14 23:36:50,687 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-14 23:36:51,159 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-14 23:36:51,380 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 23:36:51,693 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-10-14 23:36:51,936 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-14 23:36:52,359 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 116 [2020-10-14 23:36:53,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:36:53,675 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-14 23:36:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:36:53,676 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-14 23:36:53,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:36:53,677 INFO L225 Difference]: With dead ends: 98 [2020-10-14 23:36:53,677 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 23:36:53,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=200, Invalid=2662, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 23:36:53,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 23:36:53,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2020-10-14 23:36:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 23:36:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-14 23:36:53,700 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-10-14 23:36:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:36:53,700 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-14 23:36:53,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 23:36:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-14 23:36:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 23:36:53,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:36:53,701 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:36:53,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:36:53,701 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:36:53,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:36:53,702 INFO L82 PathProgramCache]: Analyzing trace with hash -291339764, now seen corresponding path program 31 times [2020-10-14 23:36:53,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:36:53,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649944698] [2020-10-14 23:36:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:36:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:36:53,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:36:56,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:36:56,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 23:36:56,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:36:56,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2864 [2020-10-14 23:36:56,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:36:56,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:36:56,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 23:36:56,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:36:56,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 23:36:56,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:36:57,786 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-14 23:36:58,110 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-14 23:36:58,268 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-14 23:36:58,509 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-10-14 23:36:58,692 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-10-14 23:36:58,976 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 90 [2020-10-14 23:36:59,173 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2020-10-14 23:36:59,446 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-14 23:36:59,725 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-10-14 23:36:59,989 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2020-10-14 23:37:00,189 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-10-14 23:37:01,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:01,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:01,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:01,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:01,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:01,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:37:01,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:01,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:01,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:01,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:01,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:01,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:37:01,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649944698] [2020-10-14 23:37:01,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:01,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 23:37:01,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688987301] [2020-10-14 23:37:01,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 23:37:01,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:01,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 23:37:01,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:37:01,198 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 31 states. [2020-10-14 23:37:02,062 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-14 23:37:02,371 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-14 23:37:02,798 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 93 [2020-10-14 23:37:03,032 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-14 23:37:03,314 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-14 23:37:03,552 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-10-14 23:37:03,974 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 116 [2020-10-14 23:37:04,591 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 128 [2020-10-14 23:37:05,250 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 132 [2020-10-14 23:37:06,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:06,308 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-14 23:37:06,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:37:06,309 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-14 23:37:06,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:06,310 INFO L225 Difference]: With dead ends: 99 [2020-10-14 23:37:06,310 INFO L226 Difference]: Without dead ends: 97 [2020-10-14 23:37:06,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=203, Invalid=2347, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 23:37:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-14 23:37:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2020-10-14 23:37:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 23:37:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-14 23:37:06,325 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 68 [2020-10-14 23:37:06,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:06,325 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-14 23:37:06,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 23:37:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-14 23:37:06,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 23:37:06,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:06,326 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:37:06,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:37:06,327 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:06,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:06,327 INFO L82 PathProgramCache]: Analyzing trace with hash -32734107, now seen corresponding path program 32 times [2020-10-14 23:37:06,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:06,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866884660] [2020-10-14 23:37:06,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:06,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:07,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:07,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 23:37:07,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:07,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1553 [2020-10-14 23:37:07,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:07,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:07,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 23:37:07,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:07,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 23:37:07,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:09,058 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-14 23:37:09,324 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-14 23:37:09,706 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-10-14 23:37:10,208 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 101 [2020-10-14 23:37:10,900 WARN L193 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 118 [2020-10-14 23:37:11,660 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 145 [2020-10-14 23:37:13,173 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 179 DAG size of output: 158 [2020-10-14 23:37:14,759 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 272 DAG size of output: 212 [2020-10-14 23:37:17,270 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 223 DAG size of output: 172 [2020-10-14 23:37:17,517 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 70 [2020-10-14 23:37:18,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:18,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:18,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:18,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:18,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:18,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:37:18,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:18,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:18,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:18,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:18,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:18,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:37:18,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866884660] [2020-10-14 23:37:18,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:18,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 23:37:18,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571563994] [2020-10-14 23:37:18,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 23:37:18,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:18,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 23:37:18,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:37:18,914 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 31 states. [2020-10-14 23:37:19,691 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-14 23:37:20,186 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-14 23:37:20,517 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-14 23:37:21,488 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 111 [2020-10-14 23:37:22,060 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-10-14 23:37:24,274 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 208 DAG size of output: 149 [2020-10-14 23:37:25,277 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 146 [2020-10-14 23:37:31,917 WARN L193 SmtUtils]: Spent 6.36 s on a formula simplification. DAG size of input: 292 DAG size of output: 207 [2020-10-14 23:37:33,836 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 215 DAG size of output: 213 [2020-10-14 23:37:48,004 WARN L193 SmtUtils]: Spent 13.66 s on a formula simplification. DAG size of input: 377 DAG size of output: 317 [2020-10-14 23:37:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:37:50,897 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-10-14 23:37:50,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:37:50,898 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-14 23:37:50,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:37:50,900 INFO L225 Difference]: With dead ends: 104 [2020-10-14 23:37:50,900 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 23:37:50,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=200, Invalid=2880, Unknown=0, NotChecked=0, Total=3080 [2020-10-14 23:37:50,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 23:37:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2020-10-14 23:37:50,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 23:37:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-14 23:37:50,917 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 70 [2020-10-14 23:37:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:37:50,917 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-14 23:37:50,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 23:37:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-14 23:37:50,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 23:37:50,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:37:50,918 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:37:50,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:37:50,918 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:37:50,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:37:50,919 INFO L82 PathProgramCache]: Analyzing trace with hash 830814186, now seen corresponding path program 33 times [2020-10-14 23:37:50,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:37:50,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995381231] [2020-10-14 23:37:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:37:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:51,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:52,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:52,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 23:37:52,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:52,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1983 [2020-10-14 23:37:52,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:52,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:52,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 23:37:52,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:37:52,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 23:37:52,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:53,554 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-14 23:37:53,762 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-14 23:37:54,030 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-14 23:37:54,360 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-14 23:37:54,807 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-10-14 23:37:55,117 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-10-14 23:37:55,554 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-10-14 23:37:55,974 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-14 23:37:56,345 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2020-10-14 23:37:56,761 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-10-14 23:37:57,072 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-14 23:37:57,303 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-14 23:37:57,531 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-14 23:37:57,760 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-14 23:37:57,985 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-14 23:37:58,200 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-14 23:37:58,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:37:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:37:58,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:37:58,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:37:58,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:37:58,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:37:58,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:37:58,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:37:58,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:37:58,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:37:58,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:37:58,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:37:58,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:37:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:37:58,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995381231] [2020-10-14 23:37:58,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:37:58,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 23:37:58,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580242204] [2020-10-14 23:37:58,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 23:37:58,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:37:58,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 23:37:58,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:37:58,940 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 32 states. [2020-10-14 23:37:59,972 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-14 23:38:00,507 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-14 23:38:00,761 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-14 23:38:01,236 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-14 23:38:01,573 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 23:38:01,996 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-14 23:38:02,305 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 23:38:02,779 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-10-14 23:38:03,113 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-14 23:38:03,721 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 116 [2020-10-14 23:38:04,350 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 112 [2020-10-14 23:38:05,063 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 116 [2020-10-14 23:38:06,014 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 23:38:07,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:38:07,231 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2020-10-14 23:38:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 23:38:07,232 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-14 23:38:07,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:38:07,234 INFO L225 Difference]: With dead ends: 130 [2020-10-14 23:38:07,234 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 23:38:07,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=240, Invalid=3182, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 23:38:07,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 23:38:07,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 84. [2020-10-14 23:38:07,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-14 23:38:07,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2020-10-14 23:38:07,249 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 71 [2020-10-14 23:38:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:38:07,249 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2020-10-14 23:38:07,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 23:38:07,249 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2020-10-14 23:38:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 23:38:07,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:38:07,250 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:38:07,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:38:07,250 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:38:07,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:38:07,251 INFO L82 PathProgramCache]: Analyzing trace with hash -219387151, now seen corresponding path program 34 times [2020-10-14 23:38:07,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:38:07,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913621640] [2020-10-14 23:38:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:38:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:07,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:09,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:09,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 23:38:09,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:38:09,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1672 [2020-10-14 23:38:09,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:09,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:09,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 23:38:09,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:38:09,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 23:38:09,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:09,428 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-14 23:38:09,642 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-14 23:38:09,948 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-14 23:38:10,324 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-14 23:38:10,577 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-14 23:38:10,992 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2020-10-14 23:38:11,211 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-14 23:38:11,549 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 92 [2020-10-14 23:38:11,812 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-10-14 23:38:12,117 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-14 23:38:12,359 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-10-14 23:38:12,700 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-14 23:38:13,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:38:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:13,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:13,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:13,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:38:13,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:38:13,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:38:13,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:13,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:13,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:38:13,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:38:13,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:38:13,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 9 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:38:13,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913621640] [2020-10-14 23:38:13,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:38:13,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 23:38:13,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810140145] [2020-10-14 23:38:13,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 23:38:13,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:38:13,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 23:38:13,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:38:13,830 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 31 states. [2020-10-14 23:38:14,871 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2020-10-14 23:38:15,222 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-14 23:38:15,643 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-14 23:38:15,978 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 23:38:16,440 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-14 23:38:16,820 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-14 23:38:17,409 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 112 [2020-10-14 23:38:19,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:38:19,423 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-14 23:38:19,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:38:19,425 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 73 [2020-10-14 23:38:19,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:38:19,426 INFO L225 Difference]: With dead ends: 117 [2020-10-14 23:38:19,426 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 23:38:19,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=154, Invalid=2198, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:38:19,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 23:38:19,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-10-14 23:38:19,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-14 23:38:19,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-14 23:38:19,440 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-10-14 23:38:19,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:38:19,441 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-14 23:38:19,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 23:38:19,441 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-14 23:38:19,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 23:38:19,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:38:19,442 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:38:19,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:38:19,442 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:38:19,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:38:19,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1106293428, now seen corresponding path program 35 times [2020-10-14 23:38:19,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:38:19,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173087233] [2020-10-14 23:38:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:38:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:19,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:21,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:21,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 23:38:21,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:38:21,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2162 [2020-10-14 23:38:21,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:21,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:21,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 23:38:21,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:38:21,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 23:38:21,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:22,727 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-14 23:38:23,010 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-14 23:38:23,349 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-14 23:38:23,786 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-10-14 23:38:24,061 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-14 23:38:24,695 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-10-14 23:38:24,958 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-14 23:38:25,405 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-14 23:38:25,776 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-10-14 23:38:26,306 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 102 [2020-10-14 23:38:26,538 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-14 23:38:26,826 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-14 23:38:27,374 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 76 [2020-10-14 23:38:27,589 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-14 23:38:27,823 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-14 23:38:28,041 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-14 23:38:28,472 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-14 23:38:29,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:38:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:29,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:38:29,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:38:29,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:38:29,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:38:29,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:38:29,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:38:29,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:38:29,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:38:29,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:38:29,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:38:29,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:38:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:38:29,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173087233] [2020-10-14 23:38:29,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:38:29,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 23:38:29,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566603900] [2020-10-14 23:38:29,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 23:38:29,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:38:29,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 23:38:29,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:38:29,447 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 33 states. [2020-10-14 23:38:30,237 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-14 23:38:30,699 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-14 23:38:31,213 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-14 23:38:31,782 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 80 [2020-10-14 23:38:32,136 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-14 23:38:32,655 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 97 [2020-10-14 23:38:33,199 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-14 23:38:33,815 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 109 [2020-10-14 23:38:34,274 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-14 23:38:35,005 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 123 [2020-10-14 23:38:35,521 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2020-10-14 23:38:36,268 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 128 [2020-10-14 23:38:36,596 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-14 23:38:36,952 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-14 23:38:39,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:38:39,088 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-14 23:38:39,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 23:38:39,090 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-14 23:38:39,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:38:39,091 INFO L225 Difference]: With dead ends: 108 [2020-10-14 23:38:39,091 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 23:38:39,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=220, Invalid=3086, Unknown=0, NotChecked=0, Total=3306 [2020-10-14 23:38:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 23:38:39,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2020-10-14 23:38:39,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 23:38:39,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-14 23:38:39,107 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 74 [2020-10-14 23:38:39,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:38:39,107 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-14 23:38:39,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 23:38:39,107 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-14 23:38:39,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 23:38:39,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:38:39,108 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:38:39,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 23:38:39,108 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:38:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:38:39,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1910213603, now seen corresponding path program 36 times [2020-10-14 23:38:39,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:38:39,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552221585] [2020-10-14 23:38:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:38:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:38:39,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking...