/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:01:37,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:01:37,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:01:37,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:01:37,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:01:37,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:01:37,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:01:37,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:01:37,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:01:37,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:01:37,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:01:37,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:01:37,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:01:37,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:01:37,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:01:37,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:01:37,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:01:37,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:01:37,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:01:37,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:01:37,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:01:37,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:01:37,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:01:37,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:01:37,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:01:37,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:01:37,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:01:37,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:01:37,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:01:37,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:01:37,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:01:37,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:01:37,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:01:37,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:01:37,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:01:37,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:01:37,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:01:37,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:01:37,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:01:37,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:01:37,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:01:37,222 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 05:01:37,261 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:01:37,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:01:37,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:01:37,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:01:37,264 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:01:37,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:01:37,264 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:01:37,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:01:37,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:01:37,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:01:37,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:01:37,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:01:37,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:01:37,267 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:01:37,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:01:37,267 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:01:37,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:01:37,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:01:37,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:01:37,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:01:37,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:01:37,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:01:37,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:01:37,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:01:37,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:01:37,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:01:37,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:01:37,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:01:37,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:01:37,270 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:01:37,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:01:37,610 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:01:37,614 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:01:37,616 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:01:37,616 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:01:37,617 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-10-14 05:01:37,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf1f44ab3/18d0aa76f1ed4c73800c786af0c32a2e/FLAGc1f8fd640 [2020-10-14 05:01:38,180 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:01:38,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-10-14 05:01:38,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf1f44ab3/18d0aa76f1ed4c73800c786af0c32a2e/FLAGc1f8fd640 [2020-10-14 05:01:38,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf1f44ab3/18d0aa76f1ed4c73800c786af0c32a2e [2020-10-14 05:01:38,504 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:01:38,505 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:01:38,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:01:38,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:01:38,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:01:38,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:01:38" (1/1) ... [2020-10-14 05:01:38,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31f6b2f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:38, skipping insertion in model container [2020-10-14 05:01:38,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:01:38" (1/1) ... [2020-10-14 05:01:38,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:01:38,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:01:39,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:01:39,051 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:01:39,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:01:39,159 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:01:39,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39 WrapperNode [2020-10-14 05:01:39,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:01:39,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:01:39,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:01:39,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:01:39,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (1/1) ... [2020-10-14 05:01:39,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (1/1) ... [2020-10-14 05:01:39,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (1/1) ... [2020-10-14 05:01:39,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (1/1) ... [2020-10-14 05:01:39,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (1/1) ... [2020-10-14 05:01:39,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (1/1) ... [2020-10-14 05:01:39,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (1/1) ... [2020-10-14 05:01:39,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:01:39,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:01:39,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:01:39,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:01:39,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (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 05:01:39,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:01:39,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:01:39,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-14 05:01:39,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-14 05:01:39,286 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-14 05:01:39,286 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-10-14 05:01:39,286 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-10-14 05:01:39,286 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-10-14 05:01:39,287 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:01:39,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:01:39,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:01:39,288 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-14 05:01:39,288 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-14 05:01:39,288 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-14 05:01:39,288 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-14 05:01:39,288 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-14 05:01:39,288 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-14 05:01:39,289 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-14 05:01:39,289 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-14 05:01:39,289 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-14 05:01:39,289 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-14 05:01:39,289 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-14 05:01:39,289 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-14 05:01:39,289 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-14 05:01:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-14 05:01:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-14 05:01:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-14 05:01:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-14 05:01:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-14 05:01:39,290 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-14 05:01:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-14 05:01:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-14 05:01:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-14 05:01:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-14 05:01:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-14 05:01:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-14 05:01:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-14 05:01:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-14 05:01:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-14 05:01:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-14 05:01:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-14 05:01:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-14 05:01:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-14 05:01:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-14 05:01:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-14 05:01:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-14 05:01:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-14 05:01:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-14 05:01:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-14 05:01:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-14 05:01:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-14 05:01:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-14 05:01:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-14 05:01:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-14 05:01:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-14 05:01:39,295 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-14 05:01:39,295 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-14 05:01:39,295 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-14 05:01:39,295 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-14 05:01:39,295 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-14 05:01:39,295 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-14 05:01:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-14 05:01:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-14 05:01:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 05:01:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-14 05:01:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-14 05:01:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-14 05:01:39,296 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-14 05:01:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-14 05:01:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-14 05:01:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-14 05:01:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-14 05:01:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:01:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-14 05:01:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-14 05:01:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-14 05:01:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-14 05:01:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-14 05:01:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-14 05:01:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-14 05:01:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-14 05:01:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-14 05:01:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-14 05:01:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-14 05:01:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-14 05:01:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-14 05:01:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-14 05:01:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-14 05:01:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-14 05:01:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-14 05:01:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-14 05:01:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-14 05:01:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-14 05:01:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-14 05:01:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-14 05:01:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-14 05:01:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-14 05:01:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-14 05:01:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-14 05:01:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-14 05:01:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-14 05:01:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-14 05:01:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-14 05:01:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-14 05:01:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-14 05:01:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-14 05:01:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-14 05:01:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-14 05:01:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-14 05:01:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-14 05:01:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-14 05:01:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-14 05:01:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-14 05:01:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-14 05:01:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-14 05:01:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-14 05:01:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-14 05:01:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-10-14 05:01:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 05:01:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 05:01:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-10-14 05:01:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 05:01:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-10-14 05:01:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 05:01:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:01:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:01:39,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:01:39,651 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-14 05:01:39,810 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:01:39,810 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 05:01:39,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:01:39 BoogieIcfgContainer [2020-10-14 05:01:39,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:01:39,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:01:39,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:01:39,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:01:39,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:01:38" (1/3) ... [2020-10-14 05:01:39,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45785602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:01:39, skipping insertion in model container [2020-10-14 05:01:39,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:01:39" (2/3) ... [2020-10-14 05:01:39,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45785602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:01:39, skipping insertion in model container [2020-10-14 05:01:39,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:01:39" (3/3) ... [2020-10-14 05:01:39,832 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-10-14 05:01:39,844 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:01:39,851 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:01:39,866 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:01:39,888 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:01:39,888 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:01:39,888 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:01:39,889 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:01:39,889 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:01:39,889 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:01:39,889 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:01:39,889 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:01:39,906 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-14 05:01:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:01:39,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:39,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:39,913 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:39,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:39,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1666427650, now seen corresponding path program 1 times [2020-10-14 05:01:39,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:39,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467900328] [2020-10-14 05:01:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:40,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:40,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:40,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:40,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:40,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:01:40,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:01:40,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-14 05:01:40,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:40,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:40,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:40,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 05:01:40,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:40,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:01:40,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:40,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:40,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:40,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:40,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:40,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 05:01:40,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:40,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:40,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:40,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:40,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:40,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:40,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 05:01:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:40,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:40,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:40,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 05:01:40,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:40,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-14 05:01:40,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:40,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:40,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:40,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-14 05:01:40,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:40,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:40,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-14 05:01:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:40,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:40,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:40,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:40,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 05:01:40,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:01:40,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-14 05:01:40,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:40,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:40,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:40,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-14 05:01:40,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:40,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:40,440 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 05:01:40,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467900328] [2020-10-14 05:01:40,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:01:40,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 05:01:40,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041821351] [2020-10-14 05:01:40,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:01:40,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:40,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:01:40,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:01:40,469 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2020-10-14 05:01:40,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:40,695 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2020-10-14 05:01:40,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:01:40,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-14 05:01:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:40,714 INFO L225 Difference]: With dead ends: 90 [2020-10-14 05:01:40,714 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 05:01:40,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:01:40,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 05:01:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-10-14 05:01:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 05:01:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-14 05:01:40,800 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-10-14 05:01:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:40,801 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-14 05:01:40,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:01:40,801 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-14 05:01:40,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:01:40,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:40,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:40,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:01:40,804 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:40,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:40,805 INFO L82 PathProgramCache]: Analyzing trace with hash -29727073, now seen corresponding path program 1 times [2020-10-14 05:01:40,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:40,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501662315] [2020-10-14 05:01:40,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:40,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:40,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:40,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:01:40,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:40,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-14 05:01:40,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:40,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:40,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:01:40,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:40,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:01:40,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:40,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:40,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:40,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:40,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:40,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:40,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:01:40,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:40,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:40,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:41,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:41,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:41,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:41,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 05:01:41,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:41,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-14 05:01:41,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:41,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:41,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:01:41,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:01:41,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:01:41,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:41,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-14 05:01:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:41,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:41,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:41,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 05:01:41,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:41,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:01:41,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:41,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:41,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:41,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-14 05:01:41,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:41,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:41,080 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 05:01:41,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501662315] [2020-10-14 05:01:41,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:01:41,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 05:01:41,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193069378] [2020-10-14 05:01:41,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:01:41,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:41,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:01:41,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:01:41,084 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-10-14 05:01:41,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:41,278 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-14 05:01:41,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:01:41,278 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-14 05:01:41,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:41,280 INFO L225 Difference]: With dead ends: 45 [2020-10-14 05:01:41,280 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 05:01:41,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:01:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 05:01:41,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-14 05:01:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 05:01:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-14 05:01:41,289 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-10-14 05:01:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:41,290 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-14 05:01:41,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:01:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-14 05:01:41,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:01:41,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:41,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:41,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:01:41,292 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:41,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:41,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1680455870, now seen corresponding path program 1 times [2020-10-14 05:01:41,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:41,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981501353] [2020-10-14 05:01:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:41,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:41,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:41,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:41,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:42,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:42,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:01:42,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:01:42,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 906 [2020-10-14 05:01:42,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:42,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:42,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:01:42,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:42,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:01:42,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:42,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:42,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:42,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:42,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:42,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:42,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:01:42,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:42,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:42,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:42,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:42,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:42,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:42,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:42,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:42,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:42,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-14 05:01:42,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:42,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-14 05:01:42,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:42,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:42,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:01:42,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:01:42,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:01:42,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:42,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-14 05:01:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:42,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:42,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:42,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 05:01:42,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:42,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:01:42,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:42,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:42,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:42,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-14 05:01:42,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:42,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:42,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981501353] [2020-10-14 05:01:42,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:42,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:01:42,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341062728] [2020-10-14 05:01:42,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:01:42,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:42,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:01:42,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:01:42,386 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 8 states. [2020-10-14 05:01:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:42,555 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-14 05:01:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:01:42,556 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-14 05:01:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:42,557 INFO L225 Difference]: With dead ends: 48 [2020-10-14 05:01:42,557 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 05:01:42,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:01:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 05:01:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-14 05:01:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 05:01:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-14 05:01:42,565 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2020-10-14 05:01:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:42,566 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-14 05:01:42,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:01:42,566 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-14 05:01:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 05:01:42,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:42,567 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:42,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:01:42,568 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:42,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:42,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1166508097, now seen corresponding path program 2 times [2020-10-14 05:01:42,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:42,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599629895] [2020-10-14 05:01:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:42,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:42,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:42,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:43,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:43,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 05:01:43,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:01:43,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-14 05:01:43,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:43,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:43,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:01:43,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:43,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:01:43,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:43,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:43,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:43,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:43,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:43,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:43,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:01:43,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:43,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:43,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:43,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:43,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:43,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:43,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-14 05:01:43,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:43,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-14 05:01:43,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:43,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:43,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:01:43,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:01:43,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:01:43,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:43,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-14 05:01:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:43,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:43,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:43,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 05:01:43,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:43,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:01:43,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:43,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:43,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:43,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-14 05:01:43,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:43,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:01:43,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599629895] [2020-10-14 05:01:43,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:43,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:01:43,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919647729] [2020-10-14 05:01:43,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:01:43,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:43,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:01:43,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:01:43,407 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-10-14 05:01:43,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:43,621 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-10-14 05:01:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:01:43,622 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-14 05:01:43,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:43,623 INFO L225 Difference]: With dead ends: 51 [2020-10-14 05:01:43,623 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 05:01:43,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:01:43,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 05:01:43,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-14 05:01:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 05:01:43,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-14 05:01:43,630 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 31 [2020-10-14 05:01:43,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:43,631 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-14 05:01:43,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:01:43,631 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-14 05:01:43,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:01:43,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:43,632 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:43,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:01:43,633 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1706812894, now seen corresponding path program 3 times [2020-10-14 05:01:43,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:43,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69888854] [2020-10-14 05:01:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:43,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:43,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:43,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:43,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:01:43,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:01:43,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-14 05:01:43,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:43,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:43,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:01:43,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 05:01:43,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:01:43,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:43,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:43,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:43,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:43,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:43,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:43,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:01:43,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:43,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:43,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:43,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:43,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:43,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:43,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:43,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:43,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:43,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:01:43,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:43,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-14 05:01:43,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:43,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:01:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:43,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:01:43,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:44,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 05:01:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:44,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:44,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:44,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-14 05:01:44,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:44,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 05:01:44,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:44,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:44,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:01:44,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:01:44,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:01:44,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 05:01:44,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69888854] [2020-10-14 05:01:44,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:01:44,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-14 05:01:44,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004811497] [2020-10-14 05:01:44,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:01:44,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:44,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:01:44,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:01:44,049 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2020-10-14 05:01:44,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:44,276 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2020-10-14 05:01:44,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:01:44,276 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-14 05:01:44,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:44,277 INFO L225 Difference]: With dead ends: 43 [2020-10-14 05:01:44,277 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 05:01:44,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:01:44,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 05:01:44,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-14 05:01:44,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 05:01:44,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-14 05:01:44,285 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 34 [2020-10-14 05:01:44,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:44,285 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-14 05:01:44,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:01:44,285 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-14 05:01:44,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 05:01:44,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:44,286 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:44,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:01:44,287 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:44,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:44,287 INFO L82 PathProgramCache]: Analyzing trace with hash 991320762, now seen corresponding path program 1 times [2020-10-14 05:01:44,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:44,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686756214] [2020-10-14 05:01:44,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:44,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:44,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:44,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:44,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 05:01:44,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:01:44,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-14 05:01:44,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:44,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:44,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:01:44,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 05:01:44,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:01:44,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:44,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:44,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:44,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:44,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:44,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:44,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:01:44,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:44,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:44,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:44,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:44,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:44,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:44,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:01:44,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:44,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-14 05:01:44,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:44,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:01:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:01:44,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:01:44,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 05:01:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:44,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:44,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:44,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 05:01:44,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:44,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-14 05:01:44,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:44,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:01:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-14 05:01:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:01:44,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:01:44,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686756214] [2020-10-14 05:01:44,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:44,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:01:44,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474529161] [2020-10-14 05:01:44,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:01:44,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:44,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:01:44,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:01:44,996 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 13 states. [2020-10-14 05:01:45,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:45,395 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-14 05:01:45,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:01:45,396 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-14 05:01:45,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:45,397 INFO L225 Difference]: With dead ends: 44 [2020-10-14 05:01:45,397 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 05:01:45,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:01:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 05:01:45,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-14 05:01:45,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:01:45,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-14 05:01:45,405 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 35 [2020-10-14 05:01:45,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:45,406 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-14 05:01:45,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:01:45,406 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-14 05:01:45,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:01:45,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:45,407 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:45,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:01:45,407 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:45,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:45,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1265881822, now seen corresponding path program 2 times [2020-10-14 05:01:45,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:45,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599900242] [2020-10-14 05:01:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:45,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:45,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:45,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:45,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:47,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:47,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:01:47,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 05:01:47,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1926 [2020-10-14 05:01:47,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:47,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:47,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:01:47,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:01:47,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:01:47,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:47,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:01:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:47,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:47,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:47,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 05:01:47,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:47,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:01:47,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:47,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:47,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:01:47,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:47,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:01:47,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:47,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 05:01:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:47,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:47,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:47,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:47,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:01:47,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:01:47,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-14 05:01:47,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:47,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:47,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:01:47,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:47,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:01:47,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:01:47,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 05:01:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:01:47,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:01:47,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:01:47,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-14 05:01:47,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:01:47,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-14 05:01:47,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:01:47,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:01:47,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:01:47,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:01:47,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:01:47,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:01:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 05:01:47,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599900242] [2020-10-14 05:01:47,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:01:47,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:01:47,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69084075] [2020-10-14 05:01:47,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:01:47,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:01:47,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:01:47,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:01:47,622 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 10 states. [2020-10-14 05:01:47,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:01:47,892 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-10-14 05:01:47,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:01:47,892 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-14 05:01:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:01:47,895 INFO L225 Difference]: With dead ends: 55 [2020-10-14 05:01:47,896 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 05:01:47,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:01:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 05:01:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-10-14 05:01:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 05:01:47,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-14 05:01:47,906 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 36 [2020-10-14 05:01:47,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:01:47,906 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-14 05:01:47,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:01:47,906 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-14 05:01:47,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 05:01:47,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:01:47,909 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:01:47,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:01:47,909 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:01:47,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:01:47,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1775282106, now seen corresponding path program 3 times [2020-10-14 05:01:47,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:01:47,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562980292] [2020-10-14 05:01:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:01:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 05:01:47,927 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 05:01:47,928 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 05:01:47,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:01:47,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 05:01:47 BoogieIcfgContainer [2020-10-14 05:01:47,951 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 05:01:47,954 INFO L168 Benchmark]: Toolchain (without parser) took 9448.00 ms. Allocated memory was 147.8 MB in the beginning and 348.1 MB in the end (delta: 200.3 MB). Free memory was 102.7 MB in the beginning and 179.6 MB in the end (delta: -76.9 MB). Peak memory consumption was 123.4 MB. Max. memory is 7.1 GB. [2020-10-14 05:01:47,955 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-14 05:01:47,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 650.43 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 102.3 MB in the beginning and 171.1 MB in the end (delta: -68.8 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-10-14 05:01:47,957 INFO L168 Benchmark]: Boogie Preprocessor took 61.12 ms. Allocated memory is still 204.5 MB. Free memory was 171.1 MB in the beginning and 168.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-10-14 05:01:47,957 INFO L168 Benchmark]: RCFGBuilder took 596.14 ms. Allocated memory is still 204.5 MB. Free memory was 168.3 MB in the beginning and 125.7 MB in the end (delta: 42.5 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. [2020-10-14 05:01:47,958 INFO L168 Benchmark]: TraceAbstraction took 8128.81 ms. Allocated memory was 204.5 MB in the beginning and 348.1 MB in the end (delta: 143.7 MB). Free memory was 124.8 MB in the beginning and 179.6 MB in the end (delta: -54.8 MB). Peak memory consumption was 88.9 MB. Max. memory is 7.1 GB. [2020-10-14 05:01:47,962 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 650.43 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 102.3 MB in the beginning and 171.1 MB in the end (delta: -68.8 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.12 ms. Allocated memory is still 204.5 MB. Free memory was 171.1 MB in the beginning and 168.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 596.14 ms. Allocated memory is still 204.5 MB. Free memory was 168.3 MB in the beginning and 125.7 MB in the end (delta: 42.5 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8128.81 ms. Allocated memory was 204.5 MB in the beginning and 348.1 MB in the end (delta: 143.7 MB). Free memory was 124.8 MB in the beginning and 179.6 MB in the end (delta: -54.8 MB). Peak memory consumption was 88.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L592] int len = 2; [L593] len < 32 && __VERIFIER_nondet_int() [L593] len < 32 && __VERIFIER_nondet_int() [L593] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L596] CALL, EXPR sll_create(len + 1) [L564] SLL head = ((void *)0); [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND TRUE len > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L572] len-- [L565] COND FALSE !(len > 0) [L574] return head; [L596] RET, EXPR sll_create(len + 1) [L596] SLL s = sll_create(len + 1); [L597] CALL, EXPR sll_length(s) [L577] int len = 0; [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND TRUE \read(head) [L579] len++ [L580] EXPR head->next [L580] head = head->next [L578] COND FALSE !(\read(head)) [L582] return len; [L597] RET, EXPR sll_length(s) [L597] COND TRUE len != sll_length(s) [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.0s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 183 SDtfs, 295 SDslu, 489 SDs, 0 SdLazy, 880 SolverSat, 91 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 127 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 20 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 249 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 205 ConstructedInterpolants, 0 QuantifiedInterpolants, 21376 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 33/46 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...