/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:22:04,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:22:04,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:22:04,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:22:04,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:22:04,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:22:04,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:22:04,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:22:04,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:22:04,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:22:04,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:22:04,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:22:04,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:22:04,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:22:04,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:22:04,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:22:04,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:22:04,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:22:04,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:22:04,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:22:04,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:22:04,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:22:04,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:22:04,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:22:04,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:22:04,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:22:04,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:22:04,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:22:04,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:22:04,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:22:04,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:22:04,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:22:04,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:22:04,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:22:04,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:22:04,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:22:04,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:22:04,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:22:04,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:22:04,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:22:04,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:22:04,985 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:22:05,013 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:22:05,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:22:05,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:22:05,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:22:05,015 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:22:05,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:22:05,016 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:22:05,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:22:05,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:22:05,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:22:05,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:22:05,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:22:05,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:22:05,017 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:22:05,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:22:05,018 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:22:05,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:22:05,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:22:05,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:22:05,019 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:22:05,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:22:05,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:22:05,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:22:05,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:22:05,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:22:05,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:22:05,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:22:05,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:22:05,020 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:22:05,021 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 -> false [2020-09-21 10:22:05,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:22:05,512 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:22:05,517 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:22:05,519 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:22:05,519 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:22:05,521 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-09-21 10:22:05,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fadaf3cac/9fb7e19533dd484e96fd67116b8903c0/FLAG890ed7d01 [2020-09-21 10:22:06,152 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:22:06,153 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/list_and_tree_cnstr-1.i [2020-09-21 10:22:06,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fadaf3cac/9fb7e19533dd484e96fd67116b8903c0/FLAG890ed7d01 [2020-09-21 10:22:06,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fadaf3cac/9fb7e19533dd484e96fd67116b8903c0 [2020-09-21 10:22:06,442 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:22:06,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:22:06,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:22:06,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:22:06,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:22:06,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:22:06" (1/1) ... [2020-09-21 10:22:06,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a556b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:06, skipping insertion in model container [2020-09-21 10:22:06,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:22:06" (1/1) ... [2020-09-21 10:22:06,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:22:06,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:22:07,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:22:07,077 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:22:07,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:22:07,196 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:22:07,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:07 WrapperNode [2020-09-21 10:22:07,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:22:07,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:22:07,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:22:07,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:22:07,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:07" (1/1) ... [2020-09-21 10:22:07,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:07" (1/1) ... [2020-09-21 10:22:07,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:07" (1/1) ... [2020-09-21 10:22:07,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:07" (1/1) ... [2020-09-21 10:22:07,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:07" (1/1) ... [2020-09-21 10:22:07,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:07" (1/1) ... [2020-09-21 10:22:07,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:07" (1/1) ... [2020-09-21 10:22:07,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:22:07,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:22:07,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:22:07,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:22:07,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:22:07,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:22:07,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:22:07,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-21 10:22:07,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-21 10:22:07,368 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-21 10:22:07,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:22:07,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:22:07,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:22:07,369 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-21 10:22:07,369 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-21 10:22:07,370 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-21 10:22:07,370 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-21 10:22:07,370 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-21 10:22:07,370 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-21 10:22:07,370 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-21 10:22:07,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-21 10:22:07,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-21 10:22:07,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-21 10:22:07,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-21 10:22:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-21 10:22:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-21 10:22:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-21 10:22:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-21 10:22:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-21 10:22:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-21 10:22:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-21 10:22:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-21 10:22:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-21 10:22:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-21 10:22:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-21 10:22:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-21 10:22:07,374 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-21 10:22:07,374 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-21 10:22:07,374 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-21 10:22:07,374 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-21 10:22:07,374 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-21 10:22:07,374 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-21 10:22:07,375 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-21 10:22:07,375 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-21 10:22:07,375 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-21 10:22:07,375 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-21 10:22:07,375 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-21 10:22:07,375 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-21 10:22:07,376 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-21 10:22:07,376 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-21 10:22:07,376 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-21 10:22:07,376 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-21 10:22:07,376 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-21 10:22:07,376 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-21 10:22:07,377 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-21 10:22:07,377 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-21 10:22:07,377 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-21 10:22:07,377 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-21 10:22:07,377 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-21 10:22:07,377 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-21 10:22:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-21 10:22:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-21 10:22:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-21 10:22:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-21 10:22:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-21 10:22:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:22:07,379 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 10:22:07,379 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-21 10:22:07,379 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 10:22:07,379 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-21 10:22:07,379 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-21 10:22:07,379 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-21 10:22:07,380 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-21 10:22:07,380 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-21 10:22:07,380 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:22:07,380 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-21 10:22:07,380 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-21 10:22:07,380 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-21 10:22:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 10:22:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-21 10:22:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-21 10:22:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-21 10:22:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-21 10:22:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-21 10:22:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-21 10:22:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-21 10:22:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-21 10:22:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-21 10:22:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-21 10:22:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-21 10:22:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-21 10:22:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-21 10:22:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-21 10:22:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-21 10:22:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-21 10:22:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-21 10:22:07,384 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-21 10:22:07,384 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-21 10:22:07,384 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-21 10:22:07,384 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-21 10:22:07,384 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-21 10:22:07,384 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-21 10:22:07,385 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-21 10:22:07,385 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-21 10:22:07,385 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-21 10:22:07,385 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-21 10:22:07,385 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-21 10:22:07,385 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-21 10:22:07,385 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-21 10:22:07,386 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-21 10:22:07,386 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-21 10:22:07,386 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-21 10:22:07,386 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-21 10:22:07,386 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-21 10:22:07,386 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-21 10:22:07,386 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-21 10:22:07,387 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-21 10:22:07,387 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-21 10:22:07,387 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-21 10:22:07,387 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:22:07,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:22:07,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 10:22:07,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 10:22:07,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:22:07,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:22:07,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:22:07,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:22:07,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:22:07,772 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-21 10:22:08,070 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:22:08,070 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-21 10:22:08,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:22:08 BoogieIcfgContainer [2020-09-21 10:22:08,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:22:08,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:22:08,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:22:08,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:22:08,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:22:06" (1/3) ... [2020-09-21 10:22:08,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce99a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:22:08, skipping insertion in model container [2020-09-21 10:22:08,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:22:07" (2/3) ... [2020-09-21 10:22:08,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce99a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:22:08, skipping insertion in model container [2020-09-21 10:22:08,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:22:08" (3/3) ... [2020-09-21 10:22:08,084 INFO L109 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2020-09-21 10:22:08,096 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:22:08,106 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:22:08,128 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:22:08,157 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:22:08,157 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:22:08,157 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:22:08,158 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:22:08,158 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:22:08,158 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:22:08,158 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:22:08,158 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:22:08,177 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-09-21 10:22:08,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:22:08,185 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:08,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:08,187 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:08,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:08,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1575706012, now seen corresponding path program 1 times [2020-09-21 10:22:08,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:08,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442526054] [2020-09-21 10:22:08,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:08,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:22:08,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442526054] [2020-09-21 10:22:08,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:22:08,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:22:08,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522936074] [2020-09-21 10:22:08,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:22:08,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:08,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:22:08,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:22:08,462 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-09-21 10:22:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:08,672 INFO L93 Difference]: Finished difference Result 108 states and 166 transitions. [2020-09-21 10:22:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:22:08,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-21 10:22:08,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:08,684 INFO L225 Difference]: With dead ends: 108 [2020-09-21 10:22:08,685 INFO L226 Difference]: Without dead ends: 47 [2020-09-21 10:22:08,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:22:08,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-21 10:22:08,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-09-21 10:22:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-21 10:22:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-09-21 10:22:08,734 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 20 [2020-09-21 10:22:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:08,734 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-09-21 10:22:08,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:22:08,734 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-09-21 10:22:08,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:22:08,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:08,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:08,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:22:08,737 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:08,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:08,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1627887593, now seen corresponding path program 1 times [2020-09-21 10:22:08,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:08,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791499961] [2020-09-21 10:22:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:08,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:22:08,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791499961] [2020-09-21 10:22:08,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:22:08,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:22:08,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698911176] [2020-09-21 10:22:08,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:22:08,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:08,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:22:08,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:22:08,824 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 4 states. [2020-09-21 10:22:08,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:08,959 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2020-09-21 10:22:08,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:22:08,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-09-21 10:22:08,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:08,963 INFO L225 Difference]: With dead ends: 75 [2020-09-21 10:22:08,963 INFO L226 Difference]: Without dead ends: 55 [2020-09-21 10:22:08,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:22:08,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-21 10:22:08,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-21 10:22:08,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-21 10:22:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2020-09-21 10:22:08,975 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 25 [2020-09-21 10:22:08,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:08,975 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2020-09-21 10:22:08,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:22:08,976 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2020-09-21 10:22:08,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 10:22:08,977 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:08,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:08,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:22:08,977 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:08,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:08,978 INFO L82 PathProgramCache]: Analyzing trace with hash -164754602, now seen corresponding path program 1 times [2020-09-21 10:22:08,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:08,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72731157] [2020-09-21 10:22:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:09,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:22:09,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72731157] [2020-09-21 10:22:09,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:22:09,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:22:09,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685597216] [2020-09-21 10:22:09,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:22:09,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:09,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:22:09,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:22:09,049 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand 4 states. [2020-09-21 10:22:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:09,177 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2020-09-21 10:22:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:22:09,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-09-21 10:22:09,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:09,179 INFO L225 Difference]: With dead ends: 93 [2020-09-21 10:22:09,179 INFO L226 Difference]: Without dead ends: 57 [2020-09-21 10:22:09,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:22:09,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-21 10:22:09,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-21 10:22:09,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-21 10:22:09,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2020-09-21 10:22:09,188 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 31 [2020-09-21 10:22:09,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:09,189 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2020-09-21 10:22:09,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:22:09,189 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2020-09-21 10:22:09,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 10:22:09,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:09,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:09,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:22:09,191 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:09,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:09,191 INFO L82 PathProgramCache]: Analyzing trace with hash -982403052, now seen corresponding path program 1 times [2020-09-21 10:22:09,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:09,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981135748] [2020-09-21 10:22:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:09,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:22:09,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981135748] [2020-09-21 10:22:09,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:22:09,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:22:09,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310643384] [2020-09-21 10:22:09,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:22:09,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:09,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:22:09,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:22:09,335 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand 6 states. [2020-09-21 10:22:09,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:09,553 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2020-09-21 10:22:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:22:09,553 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-09-21 10:22:09,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:09,555 INFO L225 Difference]: With dead ends: 82 [2020-09-21 10:22:09,555 INFO L226 Difference]: Without dead ends: 78 [2020-09-21 10:22:09,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:22:09,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-21 10:22:09,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2020-09-21 10:22:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-21 10:22:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2020-09-21 10:22:09,566 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 31 [2020-09-21 10:22:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:09,566 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2020-09-21 10:22:09,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:22:09,567 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2020-09-21 10:22:09,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 10:22:09,568 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:09,568 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:09,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:22:09,569 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:09,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:09,569 INFO L82 PathProgramCache]: Analyzing trace with hash 852152367, now seen corresponding path program 1 times [2020-09-21 10:22:09,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:09,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133633161] [2020-09-21 10:22:09,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:09,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:22:09,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133633161] [2020-09-21 10:22:09,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:22:09,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:22:09,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300459333] [2020-09-21 10:22:09,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:22:09,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:09,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:22:09,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:22:09,670 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand 6 states. [2020-09-21 10:22:09,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:09,895 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-09-21 10:22:09,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:22:09,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-21 10:22:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:09,897 INFO L225 Difference]: With dead ends: 84 [2020-09-21 10:22:09,897 INFO L226 Difference]: Without dead ends: 76 [2020-09-21 10:22:09,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:22:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-21 10:22:09,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-09-21 10:22:09,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 10:22:09,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2020-09-21 10:22:09,905 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 33 [2020-09-21 10:22:09,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:09,906 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2020-09-21 10:22:09,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:22:09,906 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2020-09-21 10:22:09,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 10:22:09,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:09,908 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:09,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:22:09,908 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:09,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:09,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1876855343, now seen corresponding path program 1 times [2020-09-21 10:22:09,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:09,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995304135] [2020-09-21 10:22:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:09,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:22:10,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995304135] [2020-09-21 10:22:10,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:22:10,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:22:10,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103893941] [2020-09-21 10:22:10,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:22:10,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:10,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:22:10,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:22:10,006 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand 6 states. [2020-09-21 10:22:10,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:10,189 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2020-09-21 10:22:10,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:22:10,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-21 10:22:10,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:10,191 INFO L225 Difference]: With dead ends: 84 [2020-09-21 10:22:10,191 INFO L226 Difference]: Without dead ends: 73 [2020-09-21 10:22:10,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:22:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-21 10:22:10,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2020-09-21 10:22:10,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-21 10:22:10,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2020-09-21 10:22:10,198 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 33 [2020-09-21 10:22:10,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:10,198 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2020-09-21 10:22:10,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:22:10,198 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2020-09-21 10:22:10,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-21 10:22:10,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:10,200 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:10,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:22:10,200 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:10,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:10,200 INFO L82 PathProgramCache]: Analyzing trace with hash -778946181, now seen corresponding path program 1 times [2020-09-21 10:22:10,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:10,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491507000] [2020-09-21 10:22:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:10,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:22:10,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491507000] [2020-09-21 10:22:10,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:10,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:22:10,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499249390] [2020-09-21 10:22:10,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:22:10,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:10,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:22:10,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:22:10,346 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand 9 states. [2020-09-21 10:22:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:10,672 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2020-09-21 10:22:10,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:22:10,673 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-21 10:22:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:10,674 INFO L225 Difference]: With dead ends: 86 [2020-09-21 10:22:10,674 INFO L226 Difference]: Without dead ends: 80 [2020-09-21 10:22:10,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:22:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-21 10:22:10,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-09-21 10:22:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-21 10:22:10,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2020-09-21 10:22:10,681 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 35 [2020-09-21 10:22:10,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:10,681 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2020-09-21 10:22:10,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:22:10,682 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2020-09-21 10:22:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-21 10:22:10,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:10,683 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:10,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:22:10,683 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:10,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:10,684 INFO L82 PathProgramCache]: Analyzing trace with hash 84455483, now seen corresponding path program 1 times [2020-09-21 10:22:10,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:10,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894823767] [2020-09-21 10:22:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:10,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:22:10,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894823767] [2020-09-21 10:22:10,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:10,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:22:10,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778730613] [2020-09-21 10:22:10,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:22:10,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:10,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:22:10,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:22:10,798 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand 9 states. [2020-09-21 10:22:11,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:11,201 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2020-09-21 10:22:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:22:11,202 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-21 10:22:11,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:11,205 INFO L225 Difference]: With dead ends: 95 [2020-09-21 10:22:11,205 INFO L226 Difference]: Without dead ends: 91 [2020-09-21 10:22:11,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:22:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-21 10:22:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-09-21 10:22:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-21 10:22:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2020-09-21 10:22:11,216 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 35 [2020-09-21 10:22:11,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:11,216 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2020-09-21 10:22:11,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:22:11,217 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2020-09-21 10:22:11,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 10:22:11,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:11,218 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:11,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:22:11,218 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:11,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:11,219 INFO L82 PathProgramCache]: Analyzing trace with hash -169587242, now seen corresponding path program 1 times [2020-09-21 10:22:11,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:11,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025680174] [2020-09-21 10:22:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:11,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:22:11,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025680174] [2020-09-21 10:22:11,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:11,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:22:11,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735575400] [2020-09-21 10:22:11,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:22:11,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:11,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:22:11,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:22:11,462 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand 10 states. [2020-09-21 10:22:11,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:11,910 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-09-21 10:22:11,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:22:11,911 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-09-21 10:22:11,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:11,913 INFO L225 Difference]: With dead ends: 99 [2020-09-21 10:22:11,913 INFO L226 Difference]: Without dead ends: 95 [2020-09-21 10:22:11,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:22:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-21 10:22:11,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2020-09-21 10:22:11,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-21 10:22:11,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 111 transitions. [2020-09-21 10:22:11,920 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 111 transitions. Word has length 37 [2020-09-21 10:22:11,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:11,920 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 111 transitions. [2020-09-21 10:22:11,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:22:11,920 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 111 transitions. [2020-09-21 10:22:11,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 10:22:11,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:11,922 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:11,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:22:11,922 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:11,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:11,922 INFO L82 PathProgramCache]: Analyzing trace with hash 284097905, now seen corresponding path program 1 times [2020-09-21 10:22:11,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:11,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688280100] [2020-09-21 10:22:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:12,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:22:12,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688280100] [2020-09-21 10:22:12,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:12,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:22:12,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084021207] [2020-09-21 10:22:12,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:22:12,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:12,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:22:12,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:22:12,173 INFO L87 Difference]: Start difference. First operand 83 states and 111 transitions. Second operand 10 states. [2020-09-21 10:22:12,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:12,616 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-09-21 10:22:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:22:12,616 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-09-21 10:22:12,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:12,618 INFO L225 Difference]: With dead ends: 101 [2020-09-21 10:22:12,618 INFO L226 Difference]: Without dead ends: 91 [2020-09-21 10:22:12,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:22:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-21 10:22:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2020-09-21 10:22:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-21 10:22:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-09-21 10:22:12,625 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 39 [2020-09-21 10:22:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:12,625 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-09-21 10:22:12,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:22:12,626 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-09-21 10:22:12,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 10:22:12,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:12,627 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:12,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:22:12,627 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:12,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:12,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1308800881, now seen corresponding path program 2 times [2020-09-21 10:22:12,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:12,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135872211] [2020-09-21 10:22:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:12,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:22:12,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135872211] [2020-09-21 10:22:12,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:12,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:22:12,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604038805] [2020-09-21 10:22:12,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:22:12,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:12,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:22:12,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:22:12,828 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 10 states. [2020-09-21 10:22:13,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:13,206 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2020-09-21 10:22:13,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:22:13,207 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-09-21 10:22:13,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:13,208 INFO L225 Difference]: With dead ends: 94 [2020-09-21 10:22:13,208 INFO L226 Difference]: Without dead ends: 81 [2020-09-21 10:22:13,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:22:13,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-21 10:22:13,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2020-09-21 10:22:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-21 10:22:13,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2020-09-21 10:22:13,213 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 39 [2020-09-21 10:22:13,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:13,214 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2020-09-21 10:22:13,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:22:13,214 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2020-09-21 10:22:13,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 10:22:13,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:13,215 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:13,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:22:13,215 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:13,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:13,216 INFO L82 PathProgramCache]: Analyzing trace with hash -315248798, now seen corresponding path program 2 times [2020-09-21 10:22:13,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:13,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607249132] [2020-09-21 10:22:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:13,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:22:13,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607249132] [2020-09-21 10:22:13,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:13,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:22:13,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950284510] [2020-09-21 10:22:13,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:22:13,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:13,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:22:13,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:22:13,482 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand 13 states. [2020-09-21 10:22:14,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:14,038 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2020-09-21 10:22:14,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:22:14,039 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-09-21 10:22:14,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:14,040 INFO L225 Difference]: With dead ends: 94 [2020-09-21 10:22:14,040 INFO L226 Difference]: Without dead ends: 90 [2020-09-21 10:22:14,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-09-21 10:22:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-21 10:22:14,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2020-09-21 10:22:14,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-21 10:22:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2020-09-21 10:22:14,048 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 39 [2020-09-21 10:22:14,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:14,048 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2020-09-21 10:22:14,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:22:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2020-09-21 10:22:14,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 10:22:14,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:14,051 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:14,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:22:14,052 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:14,052 INFO L82 PathProgramCache]: Analyzing trace with hash -15546846, now seen corresponding path program 1 times [2020-09-21 10:22:14,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:14,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644202426] [2020-09-21 10:22:14,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:14,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:22:14,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644202426] [2020-09-21 10:22:14,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:14,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:22:14,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207351382] [2020-09-21 10:22:14,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:22:14,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:14,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:22:14,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:22:14,295 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand 13 states. [2020-09-21 10:22:15,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:15,009 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2020-09-21 10:22:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:22:15,010 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-09-21 10:22:15,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:15,011 INFO L225 Difference]: With dead ends: 107 [2020-09-21 10:22:15,011 INFO L226 Difference]: Without dead ends: 103 [2020-09-21 10:22:15,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2020-09-21 10:22:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-21 10:22:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-21 10:22:15,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-21 10:22:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 109 transitions. [2020-09-21 10:22:15,016 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 109 transitions. Word has length 39 [2020-09-21 10:22:15,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:15,017 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 109 transitions. [2020-09-21 10:22:15,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:22:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 109 transitions. [2020-09-21 10:22:15,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 10:22:15,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:15,018 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:15,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:22:15,018 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:15,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:15,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2037263357, now seen corresponding path program 1 times [2020-09-21 10:22:15,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:15,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55293755] [2020-09-21 10:22:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:15,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:22:15,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55293755] [2020-09-21 10:22:15,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:15,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:22:15,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291868427] [2020-09-21 10:22:15,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:22:15,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:15,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:22:15,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:22:15,202 INFO L87 Difference]: Start difference. First operand 82 states and 109 transitions. Second operand 13 states. [2020-09-21 10:22:15,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:15,777 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2020-09-21 10:22:15,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:22:15,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-09-21 10:22:15,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:15,779 INFO L225 Difference]: With dead ends: 109 [2020-09-21 10:22:15,779 INFO L226 Difference]: Without dead ends: 101 [2020-09-21 10:22:15,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-09-21 10:22:15,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-21 10:22:15,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2020-09-21 10:22:15,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-21 10:22:15,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2020-09-21 10:22:15,786 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 41 [2020-09-21 10:22:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:15,786 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2020-09-21 10:22:15,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:22:15,787 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2020-09-21 10:22:15,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 10:22:15,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:15,787 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:15,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:22:15,788 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:15,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:15,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1233000963, now seen corresponding path program 3 times [2020-09-21 10:22:15,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:15,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986616985] [2020-09-21 10:22:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:16,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:22:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:22:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:22:16,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986616985] [2020-09-21 10:22:16,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:22:16,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:22:16,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507254379] [2020-09-21 10:22:16,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:22:16,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:22:16,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:22:16,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:22:16,167 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand 13 states. [2020-09-21 10:22:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:22:16,983 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2020-09-21 10:22:16,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:22:16,984 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-09-21 10:22:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:22:16,985 INFO L225 Difference]: With dead ends: 116 [2020-09-21 10:22:16,985 INFO L226 Difference]: Without dead ends: 110 [2020-09-21 10:22:16,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-09-21 10:22:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-21 10:22:16,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2020-09-21 10:22:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-21 10:22:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2020-09-21 10:22:16,993 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 41 [2020-09-21 10:22:16,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:22:16,994 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2020-09-21 10:22:16,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:22:16,994 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2020-09-21 10:22:16,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-21 10:22:16,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:22:16,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:22:16,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:22:16,995 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:22:16,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:22:16,996 INFO L82 PathProgramCache]: Analyzing trace with hash -2006936899, now seen corresponding path program 1 times [2020-09-21 10:22:16,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:22:16,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875744460] [2020-09-21 10:22:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:22:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:22:17,025 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:22:17,025 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:22:17,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:22:17,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:22:17 BoogieIcfgContainer [2020-09-21 10:22:17,051 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:22:17,055 INFO L168 Benchmark]: Toolchain (without parser) took 10609.42 ms. Allocated memory was 138.4 MB in the beginning and 326.6 MB in the end (delta: 188.2 MB). Free memory was 100.3 MB in the beginning and 230.6 MB in the end (delta: -130.2 MB). Peak memory consumption was 58.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:22:17,056 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 10:22:17,057 INFO L168 Benchmark]: CACSL2BoogieTranslator took 745.50 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 99.7 MB in the beginning and 167.5 MB in the end (delta: -67.8 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:22:17,057 INFO L168 Benchmark]: Boogie Preprocessor took 89.22 ms. Allocated memory is still 201.9 MB. Free memory was 167.5 MB in the beginning and 164.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:22:17,058 INFO L168 Benchmark]: RCFGBuilder took 788.18 ms. Allocated memory is still 201.9 MB. Free memory was 164.1 MB in the beginning and 107.7 MB in the end (delta: 56.4 MB). Peak memory consumption was 56.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:22:17,059 INFO L168 Benchmark]: TraceAbstraction took 8975.10 ms. Allocated memory was 201.9 MB in the beginning and 326.6 MB in the end (delta: 124.8 MB). Free memory was 107.0 MB in the beginning and 230.6 MB in the end (delta: -123.5 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:22:17,062 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 745.50 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 99.7 MB in the beginning and 167.5 MB in the end (delta: -67.8 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 89.22 ms. Allocated memory is still 201.9 MB. Free memory was 167.5 MB in the beginning and 164.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 788.18 ms. Allocated memory is still 201.9 MB. Free memory was 164.1 MB in the beginning and 107.7 MB in the end (delta: 56.4 MB). Peak memory consumption was 56.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8975.10 ms. Allocated memory was 201.9 MB in the beginning and 326.6 MB in the end (delta: 124.8 MB). Free memory was 107.0 MB in the beginning and 230.6 MB in the end (delta: -123.5 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 609]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L541] struct TreeNode* root = malloc(sizeof(*root)), *n; [L542] root->left = ((void *)0) [L543] root->right = ((void *)0) [L544] COND FALSE !(__VERIFIER_nondet_int()) [L563] n = ((void *)0) [L564] struct TreeNode* pred; [L565] COND TRUE \read(*root) [L566] pred = ((void *)0) [L567] n = root [L568] EXPR n->left [L568] n->left || n->right [L568] EXPR n->right [L568] n->left || n->right [L568] COND FALSE !(n->left || n->right) [L575] COND FALSE !(\read(*pred)) [L581] root = ((void *)0) [L565] COND FALSE !(\read(*root)) [L584] List a = (List) malloc(sizeof(struct node)); [L585] COND FALSE !(a == 0) [L586] List t; [L587] List p = a; [L588] COND TRUE __VERIFIER_nondet_int() [L589] p->h = 1 [L590] t = (List) malloc(sizeof(struct node)) [L591] COND FALSE !(t == 0) [L592] p->n = t [L593] EXPR p->n [L593] p = p->n [L588] COND FALSE !(__VERIFIER_nondet_int()) [L595] COND TRUE __VERIFIER_nondet_int() [L596] p->h = 2 [L597] t = (List) malloc(sizeof(struct node)) [L598] COND FALSE !(t == 0) [L599] p->n = t [L600] EXPR p->n [L600] p = p->n [L595] COND FALSE !(__VERIFIER_nondet_int()) [L602] p->h = 3 [L603] p = a [L604] EXPR p->h [L604] COND FALSE !(p->h == 2) [L606] EXPR p->h [L606] COND TRUE p->h == 1 [L607] EXPR p->n [L607] p = p->n [L606] EXPR p->h [L606] COND FALSE !(p->h == 1) [L608] EXPR p->h [L608] COND TRUE p->h != 3 [L609] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.8s, OverallIterations: 16, TraceHistogramMax: 3, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 855 SDtfs, 581 SDslu, 3411 SDs, 0 SdLazy, 3002 SolverSat, 254 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 222 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 154 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 559 NumberOfCodeBlocks, 559 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 503 ConstructedInterpolants, 0 QuantifiedInterpolants, 106880 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 25/71 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...