/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 --traceabstraction.use.minimal.unsat.core.enumeration 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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:48:10,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:48:10,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:48:10,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:48:10,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:48:10,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:48:10,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:48:10,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:48:10,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:48:10,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:48:10,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:48:10,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:48:10,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:48:10,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:48:10,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:48:10,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:48:10,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:48:10,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:48:10,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:48:10,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:48:10,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:48:10,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:48:10,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:48:10,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:48:10,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:48:10,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:48:10,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:48:10,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:48:10,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:48:10,193 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:48:10,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:48:10,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:48:10,197 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:48:10,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:48:10,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:48:10,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:48:10,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:48:10,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:48:10,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:48:10,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:48:10,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:48:10,204 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 [2020-08-21 23:48:10,255 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:48:10,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:48:10,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:48:10,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:48:10,261 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:48:10,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:48:10,261 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:48:10,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:48:10,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:48:10,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:48:10,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:48:10,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:48:10,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:48:10,263 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:48:10,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:48:10,263 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:48:10,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:48:10,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:48:10,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:48:10,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:48:10,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:48:10,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:48:10,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:48:10,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:48:10,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:48:10,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:48:10,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:48:10,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:48:10,266 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:48:10,266 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-08-21 23:48:10,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:48:10,598 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:48:10,601 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:48:10,602 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:48:10,603 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:48:10,604 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-21 23:48:10,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08cc6f605/abe8bcb24ad54b78b9a7be46c1253cd2/FLAG0362d7a61 [2020-08-21 23:48:11,190 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:48:11,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-21 23:48:11,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08cc6f605/abe8bcb24ad54b78b9a7be46c1253cd2/FLAG0362d7a61 [2020-08-21 23:48:11,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/08cc6f605/abe8bcb24ad54b78b9a7be46c1253cd2 [2020-08-21 23:48:11,500 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:48:11,502 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:48:11,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:48:11,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:48:11,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:48:11,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:48:11" (1/1) ... [2020-08-21 23:48:11,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42a1b8e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:11, skipping insertion in model container [2020-08-21 23:48:11,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:48:11" (1/1) ... [2020-08-21 23:48:11,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:48:11,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:48:12,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:48:12,080 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:48:12,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:48:12,203 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:48:12,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:12 WrapperNode [2020-08-21 23:48:12,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:48:12,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:48:12,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:48:12,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:48:12,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:12" (1/1) ... [2020-08-21 23:48:12,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:12" (1/1) ... [2020-08-21 23:48:12,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:12" (1/1) ... [2020-08-21 23:48:12,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:12" (1/1) ... [2020-08-21 23:48:12,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:12" (1/1) ... [2020-08-21 23:48:12,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:12" (1/1) ... [2020-08-21 23:48:12,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:12" (1/1) ... [2020-08-21 23:48:12,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:48:12,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:48:12,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:48:12,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:48:12,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:12" (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 [2020-08-21 23:48:12,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:48:12,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:48:12,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-21 23:48:12,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-21 23:48:12,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-21 23:48:12,362 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-21 23:48:12,362 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_slave [2020-08-21 23:48:12,363 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_master [2020-08-21 23:48:12,363 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_slave [2020-08-21 23:48:12,363 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2020-08-21 23:48:12,363 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2020-08-21 23:48:12,363 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_slave [2020-08-21 23:48:12,363 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_nested_lists [2020-08-21 23:48:12,364 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_reinit_nested_lists [2020-08-21 23:48:12,364 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_master [2020-08-21 23:48:12,364 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2020-08-21 23:48:12,364 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_master [2020-08-21 23:48:12,364 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2020-08-21 23:48:12,364 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_full [2020-08-21 23:48:12,364 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_dangling [2020-08-21 23:48:12,364 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_init [2020-08-21 23:48:12,365 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:48:12,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:48:12,365 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 23:48:12,365 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 23:48:12,365 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 23:48:12,365 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 23:48:12,366 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 23:48:12,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 23:48:12,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 23:48:12,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 23:48:12,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 23:48:12,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 23:48:12,367 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 23:48:12,367 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 23:48:12,367 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 23:48:12,367 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 23:48:12,367 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 23:48:12,367 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 23:48:12,367 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-21 23:48:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-21 23:48:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 23:48:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 23:48:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 23:48:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 23:48:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 23:48:12,368 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 23:48:12,369 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 23:48:12,369 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 23:48:12,369 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 23:48:12,369 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 23:48:12,369 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 23:48:12,369 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 23:48:12,369 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 23:48:12,369 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 23:48:12,370 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 23:48:12,370 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 23:48:12,370 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 23:48:12,370 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 23:48:12,370 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 23:48:12,370 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 23:48:12,370 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 23:48:12,370 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 23:48:12,370 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 23:48:12,370 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 23:48:12,371 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 23:48:12,371 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 23:48:12,371 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 23:48:12,371 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 23:48:12,371 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 23:48:12,371 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 23:48:12,371 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 23:48:12,371 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 23:48:12,371 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 23:48:12,371 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 23:48:12,372 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 23:48:12,372 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 23:48:12,374 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 23:48:12,374 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 23:48:12,375 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 23:48:12,375 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 23:48:12,375 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 23:48:12,376 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 23:48:12,376 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 23:48:12,376 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 23:48:12,376 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 23:48:12,376 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 23:48:12,377 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 23:48:12,377 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 23:48:12,377 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 23:48:12,377 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 23:48:12,377 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 23:48:12,377 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 23:48:12,377 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 23:48:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 23:48:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 23:48:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 23:48:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 23:48:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 23:48:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 23:48:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 23:48:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 23:48:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 23:48:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 23:48:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 23:48:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 23:48:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 23:48:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 23:48:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 23:48:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 23:48:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 23:48:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 23:48:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 23:48:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 23:48:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 23:48:12,381 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 23:48:12,381 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 23:48:12,382 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 23:48:12,382 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 23:48:12,382 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 23:48:12,382 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 23:48:12,383 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 23:48:12,383 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 23:48:12,383 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 23:48:12,383 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 23:48:12,383 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 23:48:12,383 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 23:48:12,383 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 23:48:12,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 23:48:12,385 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-21 23:48:12,389 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_slave [2020-08-21 23:48:12,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 23:48:12,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 23:48:12,390 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_master [2020-08-21 23:48:12,390 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_slave [2020-08-21 23:48:12,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 23:48:12,390 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2020-08-21 23:48:12,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 23:48:12,390 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-21 23:48:12,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 23:48:12,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 23:48:12,391 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2020-08-21 23:48:12,391 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_slave [2020-08-21 23:48:12,398 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_nested_lists [2020-08-21 23:48:12,398 INFO L130 BoogieDeclarations]: Found specification of procedure dll_reinit_nested_lists [2020-08-21 23:48:12,398 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_master [2020-08-21 23:48:12,399 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2020-08-21 23:48:12,399 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_master [2020-08-21 23:48:12,400 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2020-08-21 23:48:12,400 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_full [2020-08-21 23:48:12,400 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_dangling [2020-08-21 23:48:12,400 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_init [2020-08-21 23:48:12,400 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:48:12,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:48:12,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:48:13,288 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:48:13,289 INFO L295 CfgBuilder]: Removed 38 assume(true) statements. [2020-08-21 23:48:13,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:48:13 BoogieIcfgContainer [2020-08-21 23:48:13,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:48:13,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:48:13,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:48:13,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:48:13,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:48:11" (1/3) ... [2020-08-21 23:48:13,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c52cf86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:48:13, skipping insertion in model container [2020-08-21 23:48:13,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:48:12" (2/3) ... [2020-08-21 23:48:13,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c52cf86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:48:13, skipping insertion in model container [2020-08-21 23:48:13,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:48:13" (3/3) ... [2020-08-21 23:48:13,310 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_of_dll-1.i [2020-08-21 23:48:13,321 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:48:13,331 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:48:13,346 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:48:13,377 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:48:13,377 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:48:13,377 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:48:13,377 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:48:13,378 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:48:13,378 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:48:13,378 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:48:13,378 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:48:13,403 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states. [2020-08-21 23:48:13,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-21 23:48:13,412 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:13,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:13,414 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:13,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:13,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1405399524, now seen corresponding path program 1 times [2020-08-21 23:48:13,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:13,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733145477] [2020-08-21 23:48:13,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:48:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-21 23:48:13,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733145477] [2020-08-21 23:48:13,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:48:13,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 23:48:13,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289718460] [2020-08-21 23:48:13,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 23:48:13,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:13,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 23:48:13,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 23:48:13,966 INFO L87 Difference]: Start difference. First operand 169 states. Second operand 4 states. [2020-08-21 23:48:14,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:14,445 INFO L93 Difference]: Finished difference Result 343 states and 542 transitions. [2020-08-21 23:48:14,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 23:48:14,448 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-08-21 23:48:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:14,474 INFO L225 Difference]: With dead ends: 343 [2020-08-21 23:48:14,474 INFO L226 Difference]: Without dead ends: 166 [2020-08-21 23:48:14,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 23:48:14,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-21 23:48:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2020-08-21 23:48:14,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-21 23:48:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2020-08-21 23:48:14,622 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 59 [2020-08-21 23:48:14,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:14,623 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2020-08-21 23:48:14,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 23:48:14,624 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2020-08-21 23:48:14,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 23:48:14,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:14,632 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:14,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:48:14,633 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:14,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:14,633 INFO L82 PathProgramCache]: Analyzing trace with hash 747676979, now seen corresponding path program 1 times [2020-08-21 23:48:14,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:14,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415736342] [2020-08-21 23:48:14,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:14,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:14,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:48:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:14,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:15,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:15,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:15,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:15,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:15,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:15,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-21 23:48:15,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415736342] [2020-08-21 23:48:15,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:48:15,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 23:48:15,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861452996] [2020-08-21 23:48:15,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 23:48:15,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:15,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 23:48:15,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-21 23:48:15,138 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 13 states. [2020-08-21 23:48:16,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:16,252 INFO L93 Difference]: Finished difference Result 327 states and 406 transitions. [2020-08-21 23:48:16,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 23:48:16,253 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-08-21 23:48:16,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:16,256 INFO L225 Difference]: With dead ends: 327 [2020-08-21 23:48:16,256 INFO L226 Difference]: Without dead ends: 179 [2020-08-21 23:48:16,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-08-21 23:48:16,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-08-21 23:48:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 168. [2020-08-21 23:48:16,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 23:48:16,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 199 transitions. [2020-08-21 23:48:16,280 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 199 transitions. Word has length 60 [2020-08-21 23:48:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:16,281 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 199 transitions. [2020-08-21 23:48:16,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 23:48:16,281 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 199 transitions. [2020-08-21 23:48:16,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 23:48:16,285 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:16,285 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:16,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:48:16,285 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:16,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:16,286 INFO L82 PathProgramCache]: Analyzing trace with hash 586330229, now seen corresponding path program 1 times [2020-08-21 23:48:16,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:16,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825988309] [2020-08-21 23:48:16,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:16,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:16,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:48:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:16,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:16,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:16,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:16,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:16,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:48:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:16,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:16,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:17,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:17,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:17,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:17,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:17,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:17,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 23:48:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:17,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:17,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:17,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:48:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:17,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:17,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:17,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:17,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:17,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:17,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:17,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 16 proven. 93 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-21 23:48:18,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825988309] [2020-08-21 23:48:18,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:48:18,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 23:48:18,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992803345] [2020-08-21 23:48:18,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 23:48:18,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:18,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 23:48:18,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-21 23:48:18,043 INFO L87 Difference]: Start difference. First operand 168 states and 199 transitions. Second operand 28 states. [2020-08-21 23:48:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:21,224 INFO L93 Difference]: Finished difference Result 348 states and 425 transitions. [2020-08-21 23:48:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 23:48:21,225 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-21 23:48:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:21,234 INFO L225 Difference]: With dead ends: 348 [2020-08-21 23:48:21,235 INFO L226 Difference]: Without dead ends: 189 [2020-08-21 23:48:21,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 23:48:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-21 23:48:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2020-08-21 23:48:21,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-21 23:48:21,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 208 transitions. [2020-08-21 23:48:21,259 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 208 transitions. Word has length 154 [2020-08-21 23:48:21,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:21,259 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 208 transitions. [2020-08-21 23:48:21,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 23:48:21,260 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 208 transitions. [2020-08-21 23:48:21,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 23:48:21,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:21,263 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:21,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:48:21,263 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:21,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:21,264 INFO L82 PathProgramCache]: Analyzing trace with hash -467161035, now seen corresponding path program 1 times [2020-08-21 23:48:21,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:21,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436949009] [2020-08-21 23:48:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:21,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:21,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:48:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:21,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:21,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:21,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:48:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 23:48:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:48:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-08-21 23:48:22,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436949009] [2020-08-21 23:48:22,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:48:22,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 23:48:22,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354420582] [2020-08-21 23:48:22,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 23:48:22,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:22,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 23:48:22,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-08-21 23:48:22,591 INFO L87 Difference]: Start difference. First operand 176 states and 208 transitions. Second operand 19 states. [2020-08-21 23:48:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:24,889 INFO L93 Difference]: Finished difference Result 360 states and 431 transitions. [2020-08-21 23:48:24,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 23:48:24,891 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 154 [2020-08-21 23:48:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:24,897 INFO L225 Difference]: With dead ends: 360 [2020-08-21 23:48:24,897 INFO L226 Difference]: Without dead ends: 193 [2020-08-21 23:48:24,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2020-08-21 23:48:24,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-21 23:48:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 182. [2020-08-21 23:48:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-21 23:48:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-08-21 23:48:24,953 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 154 [2020-08-21 23:48:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:24,957 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-08-21 23:48:24,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 23:48:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-08-21 23:48:24,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 23:48:24,959 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:24,960 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:24,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:48:24,960 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:24,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:24,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1717739637, now seen corresponding path program 1 times [2020-08-21 23:48:24,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:24,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931642345] [2020-08-21 23:48:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:25,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:25,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:48:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:25,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:25,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:25,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:25,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:25,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:48:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:25,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:25,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:25,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:25,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:25,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:25,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:25,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:25,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 23:48:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:25,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:26,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:26,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:48:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:26,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:26,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:26,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:26,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:26,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:26,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:26,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2020-08-21 23:48:26,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931642345] [2020-08-21 23:48:26,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:48:26,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 23:48:26,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143550961] [2020-08-21 23:48:26,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 23:48:26,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:26,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 23:48:26,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-21 23:48:26,430 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 28 states. [2020-08-21 23:48:29,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:29,105 INFO L93 Difference]: Finished difference Result 371 states and 447 transitions. [2020-08-21 23:48:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 23:48:29,105 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-21 23:48:29,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:29,111 INFO L225 Difference]: With dead ends: 371 [2020-08-21 23:48:29,112 INFO L226 Difference]: Without dead ends: 198 [2020-08-21 23:48:29,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 23:48:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-08-21 23:48:29,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2020-08-21 23:48:29,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-21 23:48:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 217 transitions. [2020-08-21 23:48:29,140 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 217 transitions. Word has length 154 [2020-08-21 23:48:29,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:29,144 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 217 transitions. [2020-08-21 23:48:29,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 23:48:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 217 transitions. [2020-08-21 23:48:29,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 23:48:29,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:29,148 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:29,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:48:29,149 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:29,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2084601485, now seen corresponding path program 1 times [2020-08-21 23:48:29,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:29,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683299201] [2020-08-21 23:48:29,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:29,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:29,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:48:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:29,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:29,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:29,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:29,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:29,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:48:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:29,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:29,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 23:48:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:48:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-08-21 23:48:30,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683299201] [2020-08-21 23:48:30,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:48:30,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 23:48:30,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216219080] [2020-08-21 23:48:30,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 23:48:30,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:48:30,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 23:48:30,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-08-21 23:48:30,624 INFO L87 Difference]: Start difference. First operand 185 states and 217 transitions. Second operand 22 states. [2020-08-21 23:48:32,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:48:32,743 INFO L93 Difference]: Finished difference Result 323 states and 388 transitions. [2020-08-21 23:48:32,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 23:48:32,743 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 154 [2020-08-21 23:48:32,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:48:32,748 INFO L225 Difference]: With dead ends: 323 [2020-08-21 23:48:32,748 INFO L226 Difference]: Without dead ends: 254 [2020-08-21 23:48:32,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 23:48:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-08-21 23:48:32,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2020-08-21 23:48:32,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-21 23:48:32,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 246 transitions. [2020-08-21 23:48:32,767 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 246 transitions. Word has length 154 [2020-08-21 23:48:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:48:32,768 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 246 transitions. [2020-08-21 23:48:32,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 23:48:32,768 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 246 transitions. [2020-08-21 23:48:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-21 23:48:32,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:48:32,771 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:48:32,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:48:32,771 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:48:32,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:48:32,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1709746076, now seen corresponding path program 1 times [2020-08-21 23:48:32,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:48:32,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452291703] [2020-08-21 23:48:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:48:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:33,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:33,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 23:48:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:33,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:33,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:33,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:34,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:34,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:48:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:34,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:35,036 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-08-21 23:48:35,910 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 20 [2020-08-21 23:48:36,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:36,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:36,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:36,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 23:48:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:36,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:37,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:37,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 23:48:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:37,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 23:48:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:38,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 23:48:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:38,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 23:48:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:48:39,006 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-08-21 23:48:39,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:48:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat