/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.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:30:35,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:30:35,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:30:35,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:30:35,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:30:35,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:30:35,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:30:35,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:30:35,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:30:35,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:30:35,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:30:35,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:30:35,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:30:35,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:30:35,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:30:35,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:30:35,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:30:35,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:30:35,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:30:35,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:30:35,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:30:35,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:30:35,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:30:35,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:30:35,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 01:30:35,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 01:30:35,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 01:30:35,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 01:30:35,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 01:30:35,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 01:30:36,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 01:30:36,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 01:30:36,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 01:30:36,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 01:30:36,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 01:30:36,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 01:30:36,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 01:30:36,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 01:30:36,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:30:36,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:30:36,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:30:36,008 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 01:30:36,046 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:30:36,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:30:36,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:30:36,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:30:36,051 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:30:36,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:30:36,051 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:30:36,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:30:36,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:30:36,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:30:36,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:30:36,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:30:36,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:30:36,053 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:30:36,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:30:36,053 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:30:36,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:30:36,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:30:36,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:30:36,054 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:30:36,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:30:36,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:30:36,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:30:36,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:30:36,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:30:36,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:30:36,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:30:36,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:30:36,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:30:36,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:30:36,346 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:30:36,359 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:30:36,362 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:30:36,364 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:30:36,364 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:30:36,365 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-20 01:30:36,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad9f1cd2b/05eb5be2a7dc4fc9a6ff9a0c41acd6ca/FLAGd0ef45d40 [2020-07-20 01:30:37,021 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:30:37,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/dll_nullified-1.i [2020-07-20 01:30:37,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad9f1cd2b/05eb5be2a7dc4fc9a6ff9a0c41acd6ca/FLAGd0ef45d40 [2020-07-20 01:30:37,337 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad9f1cd2b/05eb5be2a7dc4fc9a6ff9a0c41acd6ca [2020-07-20 01:30:37,346 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:30:37,349 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:30:37,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:30:37,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:30:37,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:30:37,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:30:37" (1/1) ... [2020-07-20 01:30:37,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51fba352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:37, skipping insertion in model container [2020-07-20 01:30:37,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:30:37" (1/1) ... [2020-07-20 01:30:37,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:30:37,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:30:37,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:30:37,881 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:30:37,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:30:38,022 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:30:38,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:38 WrapperNode [2020-07-20 01:30:38,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:30:38,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:30:38,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:30:38,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:30:38,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:38" (1/1) ... [2020-07-20 01:30:38,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:38" (1/1) ... [2020-07-20 01:30:38,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:38" (1/1) ... [2020-07-20 01:30:38,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:38" (1/1) ... [2020-07-20 01:30:38,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:38" (1/1) ... [2020-07-20 01:30:38,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:38" (1/1) ... [2020-07-20 01:30:38,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:38" (1/1) ... [2020-07-20 01:30:38,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:30:38,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:30:38,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:30:38,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:30:38,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-20 01:30:38,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:30:38,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:30:38,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 01:30:38,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 01:30:38,168 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 01:30:38,168 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2020-07-20 01:30:38,168 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:30:38,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:30:38,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:30:38,169 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 01:30:38,169 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 01:30:38,169 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 01:30:38,169 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 01:30:38,169 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 01:30:38,170 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 01:30:38,170 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 01:30:38,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 01:30:38,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 01:30:38,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 01:30:38,171 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 01:30:38,172 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 01:30:38,172 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 01:30:38,172 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 01:30:38,173 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 01:30:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 01:30:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 01:30:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 01:30:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 01:30:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 01:30:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 01:30:38,175 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 01:30:38,176 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 01:30:38,176 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 01:30:38,176 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 01:30:38,176 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 01:30:38,176 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 01:30:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 01:30:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 01:30:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 01:30:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 01:30:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 01:30:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 01:30:38,177 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 01:30:38,178 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 01:30:38,178 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 01:30:38,178 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 01:30:38,178 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 01:30:38,178 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 01:30:38,178 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 01:30:38,178 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 01:30:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 01:30:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 01:30:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 01:30:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 01:30:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 01:30:38,179 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 01:30:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 01:30:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 01:30:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 01:30:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 01:30:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 01:30:38,180 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 01:30:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 01:30:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 01:30:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 01:30:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-20 01:30:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 01:30:38,181 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 01:30:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 01:30:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 01:30:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 01:30:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 01:30:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 01:30:38,182 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 01:30:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 01:30:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 01:30:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 01:30:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 01:30:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 01:30:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 01:30:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 01:30:38,184 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 01:30:38,184 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 01:30:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 01:30:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 01:30:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 01:30:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 01:30:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 01:30:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 01:30:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 01:30:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 01:30:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 01:30:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 01:30:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 01:30:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 01:30:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 01:30:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 01:30:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 01:30:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 01:30:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 01:30:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 01:30:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 01:30:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 01:30:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 01:30:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 01:30:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 01:30:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 01:30:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 01:30:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 01:30:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 01:30:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 01:30:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 01:30:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 01:30:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 01:30:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 01:30:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2020-07-20 01:30:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 01:30:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 01:30:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 01:30:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:30:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 01:30:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 01:30:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 01:30:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:30:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:30:38,580 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 01:30:38,819 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:30:38,820 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 01:30:38,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:30:38 BoogieIcfgContainer [2020-07-20 01:30:38,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:30:38,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:30:38,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:30:38,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:30:38,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:30:37" (1/3) ... [2020-07-20 01:30:38,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2bfc32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:30:38, skipping insertion in model container [2020-07-20 01:30:38,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:30:38" (2/3) ... [2020-07-20 01:30:38,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2bfc32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:30:38, skipping insertion in model container [2020-07-20 01:30:38,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:30:38" (3/3) ... [2020-07-20 01:30:38,833 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-07-20 01:30:38,844 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:30:38,853 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:30:38,864 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:30:38,887 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:30:38,887 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:30:38,888 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:30:38,888 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:30:38,888 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:30:38,888 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:30:38,889 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:30:38,889 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:30:38,908 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-20 01:30:38,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 01:30:38,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:30:38,917 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] [2020-07-20 01:30:38,917 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:30:38,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:30:38,924 INFO L82 PathProgramCache]: Analyzing trace with hash 248267832, now seen corresponding path program 1 times [2020-07-20 01:30:38,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:30:38,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560868918] [2020-07-20 01:30:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@416f6d52 [2020-07-20 01:30:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:30:39,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560868918] [2020-07-20 01:30:39,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:30:39,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 01:30:39,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178506394] [2020-07-20 01:30:39,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 01:30:39,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:30:39,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 01:30:39,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:30:39,297 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 7 states. [2020-07-20 01:30:39,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:30:39,614 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-07-20 01:30:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:30:39,615 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-20 01:30:39,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:30:39,624 INFO L225 Difference]: With dead ends: 73 [2020-07-20 01:30:39,624 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 01:30:39,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:30:39,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 01:30:39,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-07-20 01:30:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 01:30:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-07-20 01:30:39,667 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 20 [2020-07-20 01:30:39,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:30:39,667 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-07-20 01:30:39,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 01:30:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-07-20 01:30:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 01:30:39,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:30:39,669 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] [2020-07-20 01:30:39,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:30:39,670 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:30:39,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:30:39,671 INFO L82 PathProgramCache]: Analyzing trace with hash 215856973, now seen corresponding path program 1 times [2020-07-20 01:30:39,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:30:39,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887820149] [2020-07-20 01:30:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@416f6d52 [2020-07-20 01:30:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:30:39,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887820149] [2020-07-20 01:30:39,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:30:39,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 01:30:39,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743318207] [2020-07-20 01:30:39,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:30:39,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:30:39,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:30:39,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:30:39,815 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 6 states. [2020-07-20 01:30:39,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:30:39,999 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2020-07-20 01:30:40,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:30:40,000 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-07-20 01:30:40,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:30:40,002 INFO L225 Difference]: With dead ends: 63 [2020-07-20 01:30:40,002 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 01:30:40,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:30:40,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 01:30:40,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-20 01:30:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 01:30:40,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-07-20 01:30:40,011 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2020-07-20 01:30:40,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:30:40,011 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-07-20 01:30:40,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:30:40,012 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-07-20 01:30:40,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 01:30:40,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:30:40,013 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] [2020-07-20 01:30:40,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:30:40,013 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:30:40,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:30:40,014 INFO L82 PathProgramCache]: Analyzing trace with hash -795260277, now seen corresponding path program 1 times [2020-07-20 01:30:40,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:30:40,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308047127] [2020-07-20 01:30:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@416f6d52 [2020-07-20 01:30:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:30:40,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308047127] [2020-07-20 01:30:40,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670001845] [2020-07-20 01:30:40,200 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e06056a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:30:40,420 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e06056a issued 3 check-sat command(s) [2020-07-20 01:30:40,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:30:40,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 01:30:40,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:30:40,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:30:40,537 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2020-07-20 01:30:40,538 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:30:40,556 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:30:40,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:30:40,564 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2020-07-20 01:30:40,565 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 01:30:40,574 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:30:40,575 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:30:40,575 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:37 [2020-07-20 01:30:40,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:30:40,762 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2020-07-20 01:30:40,763 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:30:40,775 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:30:40,780 INFO L350 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2020-07-20 01:30:40,781 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2020-07-20 01:30:40,782 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 01:30:40,786 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:30:40,787 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:30:40,787 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:55, output treesize:7 [2020-07-20 01:30:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:30:40,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:30:40,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2020-07-20 01:30:40,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283921385] [2020-07-20 01:30:40,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 01:30:40,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:30:40,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 01:30:40,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-07-20 01:30:40,817 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 15 states. [2020-07-20 01:30:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:30:41,462 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2020-07-20 01:30:41,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 01:30:41,462 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-07-20 01:30:41,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:30:41,465 INFO L225 Difference]: With dead ends: 65 [2020-07-20 01:30:41,467 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 01:30:41,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2020-07-20 01:30:41,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 01:30:41,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2020-07-20 01:30:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 01:30:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-07-20 01:30:41,485 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2020-07-20 01:30:41,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:30:41,486 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-07-20 01:30:41,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 01:30:41,486 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-07-20 01:30:41,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 01:30:41,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:30:41,489 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:30:41,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 01:30:41,695 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:30:41,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:30:41,696 INFO L82 PathProgramCache]: Analyzing trace with hash 260013466, now seen corresponding path program 1 times [2020-07-20 01:30:41,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:30:41,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135009028] [2020-07-20 01:30:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@416f6d52 [2020-07-20 01:30:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:30:41,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135009028] [2020-07-20 01:30:41,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314247208] [2020-07-20 01:30:41,909 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@fe109de No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:30:42,828 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@fe109de issued 4 check-sat command(s) [2020-07-20 01:30:42,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:30:42,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 01:30:42,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:30:42,859 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:30:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 01:30:42,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:30:42,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2020-07-20 01:30:42,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425583143] [2020-07-20 01:30:42,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 01:30:42,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:30:42,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 01:30:42,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:30:42,876 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 4 states. [2020-07-20 01:30:42,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:30:42,900 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2020-07-20 01:30:42,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:30:42,902 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-07-20 01:30:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:30:42,903 INFO L225 Difference]: With dead ends: 57 [2020-07-20 01:30:42,903 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 01:30:42,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-07-20 01:30:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 01:30:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-20 01:30:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 01:30:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-07-20 01:30:42,909 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 34 [2020-07-20 01:30:42,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:30:42,909 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-07-20 01:30:42,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 01:30:42,910 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-07-20 01:30:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 01:30:42,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:30:42,911 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:30:43,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:30:43,125 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:30:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:30:43,126 INFO L82 PathProgramCache]: Analyzing trace with hash 260011544, now seen corresponding path program 1 times [2020-07-20 01:30:43,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:30:43,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476183355] [2020-07-20 01:30:43,127 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@416f6d52 [2020-07-20 01:30:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:30:43,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476183355] [2020-07-20 01:30:43,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598756037] [2020-07-20 01:30:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58e9ba8e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:30:43,811 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58e9ba8e issued 4 check-sat command(s) [2020-07-20 01:30:43,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:30:43,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:30:43,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:30:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:30:43,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:30:43,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2020-07-20 01:30:43,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862990721] [2020-07-20 01:30:43,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 01:30:43,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:30:43,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 01:30:43,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:30:43,844 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 10 states. [2020-07-20 01:30:44,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:30:44,068 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-07-20 01:30:44,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 01:30:44,068 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-07-20 01:30:44,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:30:44,070 INFO L225 Difference]: With dead ends: 76 [2020-07-20 01:30:44,071 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 01:30:44,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:30:44,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 01:30:44,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-07-20 01:30:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 01:30:44,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-20 01:30:44,112 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 34 [2020-07-20 01:30:44,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:30:44,113 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-20 01:30:44,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 01:30:44,113 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-20 01:30:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 01:30:44,114 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:30:44,114 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:30:44,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:30:44,316 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:30:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:30:44,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1408992297, now seen corresponding path program 2 times [2020-07-20 01:30:44,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:30:44,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399161879] [2020-07-20 01:30:44,319 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@416f6d52 [2020-07-20 01:30:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:30:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:30:44,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399161879] [2020-07-20 01:30:44,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286760165] [2020-07-20 01:30:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@46660187 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:31:45,607 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@46660187 issued 4 check-sat command(s) [2020-07-20 01:31:45,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:31:45,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 01:31:45,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:31:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:31:45,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:31:45,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2020-07-20 01:31:45,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114299734] [2020-07-20 01:31:45,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 01:31:45,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:31:45,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 01:31:45,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:31:45,965 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 11 states. [2020-07-20 01:31:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:31:46,193 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-07-20 01:31:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 01:31:46,193 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 01:31:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:31:46,195 INFO L225 Difference]: With dead ends: 83 [2020-07-20 01:31:46,195 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 01:31:46,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-07-20 01:31:46,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 01:31:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-20 01:31:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 01:31:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-07-20 01:31:46,204 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 41 [2020-07-20 01:31:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:31:46,205 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-07-20 01:31:46,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 01:31:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-07-20 01:31:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 01:31:46,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:31:46,206 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:31:46,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:31:46,411 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:31:46,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:31:46,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2107133704, now seen corresponding path program 3 times [2020-07-20 01:31:46,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:31:46,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540863173] [2020-07-20 01:31:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@416f6d52 [2020-07-20 01:31:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:31:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:31:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:31:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:31:46,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540863173] [2020-07-20 01:31:46,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032781405] [2020-07-20 01:31:46,586 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1b9cd428 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true