/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/splice-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:10:14,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:10:14,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:10:14,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:10:14,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:10:14,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:10:14,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:10:14,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:10:14,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:10:14,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:10:14,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:10:14,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:10:14,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:10:14,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:10:14,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:10:14,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:10:14,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:10:14,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:10:14,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:10:14,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:10:14,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:10:14,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:10:14,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:10:14,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:10:14,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 01:10:14,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 01:10:14,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 01:10:14,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 01:10:14,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 01:10:14,161 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 01:10:14,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 01:10:14,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 01:10:14,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 01:10:14,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 01:10:14,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 01:10:14,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 01:10:14,166 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 01:10:14,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 01:10:14,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:10:14,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:10:14,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:10:14,170 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 [2020-07-21 01:10:14,188 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:10:14,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:10:14,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:10:14,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:10:14,191 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:10:14,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:10:14,192 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:10:14,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:10:14,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:10:14,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:10:14,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:10:14,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:10:14,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:10:14,193 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:10:14,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:10:14,194 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:10:14,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:10:14,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:10:14,194 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:10:14,195 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:10:14,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:10:14,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:10:14,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:10:14,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:10:14,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:10:14,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:10:14,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:10:14,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:10:14,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:10:14,197 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 01:10:14,638 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:10:14,663 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:10:14,670 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:10:14,673 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:10:14,676 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:10:14,679 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-1.i [2020-07-21 01:10:14,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f59d7d63/b66cf9acd909467ba4922184bac7bc8f/FLAGbdbdb823f [2020-07-21 01:10:15,582 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:10:15,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/splice-1.i [2020-07-21 01:10:15,603 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f59d7d63/b66cf9acd909467ba4922184bac7bc8f/FLAGbdbdb823f [2020-07-21 01:10:15,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f59d7d63/b66cf9acd909467ba4922184bac7bc8f [2020-07-21 01:10:15,886 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:10:15,891 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:10:15,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:10:15,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:10:15,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:10:15,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:10:15" (1/1) ... [2020-07-21 01:10:15,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cee54b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:15, skipping insertion in model container [2020-07-21 01:10:15,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:10:15" (1/1) ... [2020-07-21 01:10:15,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:10:15,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:10:16,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:10:16,755 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:10:16,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:10:16,933 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:10:16,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:16 WrapperNode [2020-07-21 01:10:16,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:10:16,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:10:16,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:10:16,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:10:16,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:16" (1/1) ... [2020-07-21 01:10:16,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:16" (1/1) ... [2020-07-21 01:10:17,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:16" (1/1) ... [2020-07-21 01:10:17,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:16" (1/1) ... [2020-07-21 01:10:17,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:16" (1/1) ... [2020-07-21 01:10:17,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:16" (1/1) ... [2020-07-21 01:10:17,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:16" (1/1) ... [2020-07-21 01:10:17,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:10:17,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:10:17,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:10:17,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:10:17,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:16" (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 [2020-07-21 01:10:17,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:10:17,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:10:17,192 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 01:10:17,192 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 01:10:17,192 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-21 01:10:17,192 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-21 01:10:17,193 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-21 01:10:17,193 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-21 01:10:17,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:10:17,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:10:17,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:10:17,193 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 01:10:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 01:10:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 01:10:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 01:10:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 01:10:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 01:10:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 01:10:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 01:10:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 01:10:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 01:10:17,196 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 01:10:17,196 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 01:10:17,196 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 01:10:17,196 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 01:10:17,196 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 01:10:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 01:10:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 01:10:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 01:10:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-21 01:10:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-21 01:10:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-21 01:10:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 01:10:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 01:10:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 01:10:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 01:10:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 01:10:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 01:10:17,199 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 01:10:17,199 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 01:10:17,199 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 01:10:17,199 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 01:10:17,199 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 01:10:17,200 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 01:10:17,200 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 01:10:17,200 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 01:10:17,200 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 01:10:17,200 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 01:10:17,200 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 01:10:17,200 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 01:10:17,201 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 01:10:17,201 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 01:10:17,201 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 01:10:17,201 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 01:10:17,201 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 01:10:17,201 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 01:10:17,202 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 01:10:17,202 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 01:10:17,202 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 01:10:17,202 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 01:10:17,202 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 01:10:17,202 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 01:10:17,203 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 01:10:17,203 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 01:10:17,203 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 01:10:17,203 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 01:10:17,203 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 01:10:17,204 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 01:10:17,204 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 01:10:17,204 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 01:10:17,204 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 01:10:17,204 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 01:10:17,204 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 01:10:17,205 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 01:10:17,205 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:10:17,205 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 01:10:17,205 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 01:10:17,205 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 01:10:17,205 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 01:10:17,206 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 01:10:17,206 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 01:10:17,206 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 01:10:17,206 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 01:10:17,206 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 01:10:17,206 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 01:10:17,207 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 01:10:17,207 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 01:10:17,207 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 01:10:17,207 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 01:10:17,207 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 01:10:17,207 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 01:10:17,208 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 01:10:17,208 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 01:10:17,208 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 01:10:17,208 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 01:10:17,208 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 01:10:17,208 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 01:10:17,208 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 01:10:17,208 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 01:10:17,208 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 01:10:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 01:10:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 01:10:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 01:10:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 01:10:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 01:10:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 01:10:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 01:10:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 01:10:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 01:10:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 01:10:17,210 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 01:10:17,210 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 01:10:17,210 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 01:10:17,210 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 01:10:17,210 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 01:10:17,210 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 01:10:17,210 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 01:10:17,210 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 01:10:17,211 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-21 01:10:17,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:10:17,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 01:10:17,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:10:17,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 01:10:17,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 01:10:17,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:10:17,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:10:17,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:10:17,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:10:17,690 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-21 01:10:18,002 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:10:18,003 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-21 01:10:18,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:10:18 BoogieIcfgContainer [2020-07-21 01:10:18,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:10:18,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:10:18,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:10:18,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:10:18,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:10:15" (1/3) ... [2020-07-21 01:10:18,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ced3a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:10:18, skipping insertion in model container [2020-07-21 01:10:18,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:16" (2/3) ... [2020-07-21 01:10:18,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ced3a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:10:18, skipping insertion in model container [2020-07-21 01:10:18,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:10:18" (3/3) ... [2020-07-21 01:10:18,027 INFO L109 eAbstractionObserver]: Analyzing ICFG splice-1.i [2020-07-21 01:10:18,043 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:10:18,054 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:10:18,076 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:10:18,105 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:10:18,105 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:10:18,105 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:10:18,105 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:10:18,105 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:10:18,106 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:10:18,106 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:10:18,106 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:10:18,130 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-21 01:10:18,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 01:10:18,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:10:18,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:10:18,142 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:10:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:10:18,149 INFO L82 PathProgramCache]: Analyzing trace with hash 661731879, now seen corresponding path program 1 times [2020-07-21 01:10:18,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:10:18,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237678066] [2020-07-21 01:10:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:10:18,399 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:10:18,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:10:18,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:10:18,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:10:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:10:18,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:10:18,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237678066] [2020-07-21 01:10:18,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:10:18,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:10:18,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486959733] [2020-07-21 01:10:18,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:10:18,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:10:18,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:10:18,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:10:18,468 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-07-21 01:10:18,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:10:18,498 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2020-07-21 01:10:18,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:10:18,500 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-07-21 01:10:18,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:10:18,511 INFO L225 Difference]: With dead ends: 54 [2020-07-21 01:10:18,512 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 01:10:18,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:10:18,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 01:10:18,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 01:10:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 01:10:18,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-07-21 01:10:18,561 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 16 [2020-07-21 01:10:18,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:10:18,562 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-07-21 01:10:18,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:10:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-07-21 01:10:18,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 01:10:18,563 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:10:18,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:10:18,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:10:18,780 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:10:18,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:10:18,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1973627133, now seen corresponding path program 1 times [2020-07-21 01:10:18,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:10:18,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797772813] [2020-07-21 01:10:18,783 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:10:18,922 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:10:18,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:10:18,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 01:10:18,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:10:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:10:19,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:10:19,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797772813] [2020-07-21 01:10:19,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:10:19,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:10:19,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025620721] [2020-07-21 01:10:19,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:10:19,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:10:19,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:10:19,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:10:19,062 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 4 states. [2020-07-21 01:10:19,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:10:19,221 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2020-07-21 01:10:19,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:10:19,222 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-07-21 01:10:19,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:10:19,224 INFO L225 Difference]: With dead ends: 49 [2020-07-21 01:10:19,225 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 01:10:19,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:10:19,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 01:10:19,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-07-21 01:10:19,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 01:10:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-07-21 01:10:19,248 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2020-07-21 01:10:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:10:19,248 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-07-21 01:10:19,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:10:19,249 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-07-21 01:10:19,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 01:10:19,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:10:19,253 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] [2020-07-21 01:10:19,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:10:19,467 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:10:19,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:10:19,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1925443576, now seen corresponding path program 1 times [2020-07-21 01:10:19,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:10:19,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190624443] [2020-07-21 01:10:19,472 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:10:19,697 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:10:19,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:10:19,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 01:10:19,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:10:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 01:10:19,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:10:19,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190624443] [2020-07-21 01:10:19,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:10:19,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:10:19,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654333266] [2020-07-21 01:10:19,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:10:19,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:10:19,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:10:19,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:10:19,761 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2020-07-21 01:10:19,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:10:19,869 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-07-21 01:10:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:10:19,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-21 01:10:19,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:10:19,875 INFO L225 Difference]: With dead ends: 46 [2020-07-21 01:10:19,875 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 01:10:19,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:10:19,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 01:10:19,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-07-21 01:10:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 01:10:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-07-21 01:10:19,897 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 24 [2020-07-21 01:10:19,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:10:19,898 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-07-21 01:10:19,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:10:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-07-21 01:10:19,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 01:10:19,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:10:19,900 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] [2020-07-21 01:10:20,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:10:20,117 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:10:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:10:20,118 INFO L82 PathProgramCache]: Analyzing trace with hash 777953469, now seen corresponding path program 1 times [2020-07-21 01:10:20,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:10:20,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267546303] [2020-07-21 01:10:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:10:20,274 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:10:20,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:10:20,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 01:10:20,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:10:20,344 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 01:10:20,345 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:10:20,350 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:10:20,351 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:10:20,352 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-21 01:10:20,390 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 01:10:20,390 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:10:20,425 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:10:20,426 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:10:20,427 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-07-21 01:10:20,475 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:10:20,476 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 15 [2020-07-21 01:10:20,478 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:10:20,493 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:10:20,493 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:10:20,494 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:18 [2020-07-21 01:10:20,545 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-07-21 01:10:20,545 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2020-07-21 01:10:20,546 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:10:20,552 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:10:20,553 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:10:20,553 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:12 [2020-07-21 01:10:20,578 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-07-21 01:10:20,580 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:10:20,591 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:10:20,593 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-21 01:10:20,594 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:19 [2020-07-21 01:10:20,663 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 22 treesize of output 10 [2020-07-21 01:10:20,665 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:10:20,670 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:10:20,672 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:10:20,673 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:26, output treesize:3 [2020-07-21 01:10:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:10:20,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:10:21,238 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~p~0.offset Int)) (< (select (select (store |c_#memory_int| c_main_~p~0.base (store (select |c_#memory_int| c_main_~p~0.base) main_~p~0.offset 3)) c_main_~a~0.base) c_main_~a~0.offset) 3)) is different from false [2020-07-21 01:10:21,266 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 01:10:21,273 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:10:21,274 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-21 01:10:21,275 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:35 [2020-07-21 01:10:24,819 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 01:10:24,895 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 430 treesize of output 414 [2020-07-21 01:10:24,902 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 01:10:24,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,914 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 01:10:24,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,920 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 01:10:24,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,932 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 01:10:24,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,940 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 01:10:24,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:10:24,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,953 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 01:10:24,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 01:10:24,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,966 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 01:10:24,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,971 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 01:10:24,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,976 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 01:10:24,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,981 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 01:10:24,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:24,988 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2020-07-21 01:10:25,332 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 31 [2020-07-21 01:10:25,334 INFO L624 ElimStorePlain]: treesize reduction 3804, result has 1.3 percent of original size [2020-07-21 01:10:25,336 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 01:10:25,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:25,339 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 01:10:25,340 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:48, output treesize:50 [2020-07-21 01:10:25,342 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 01:10:25,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:25,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:27,409 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 01:10:27,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:29,488 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 01:10:29,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:31,564 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 01:10:31,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:31,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:10:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-07-21 01:10:31,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267546303] [2020-07-21 01:10:31,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:10:31,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-21 01:10:31,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656799367] [2020-07-21 01:10:31,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 01:10:31,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:10:31,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 01:10:31,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=217, Unknown=5, NotChecked=30, Total=306 [2020-07-21 01:10:31,661 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 18 states. [2020-07-21 01:10:34,386 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2020-07-21 01:10:40,327 WARN L193 SmtUtils]: Spent 3.57 s on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-07-21 01:11:04,912 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2020-07-21 01:11:11,058 WARN L193 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-07-21 01:11:48,491 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2020-07-21 01:12:24,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:12:24,272 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2020-07-21 01:12:24,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 01:12:24,273 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-07-21 01:12:24,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:12:24,277 INFO L225 Difference]: With dead ends: 81 [2020-07-21 01:12:24,277 INFO L226 Difference]: Without dead ends: 74 [2020-07-21 01:12:24,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 67.0s TimeCoverageRelationStatistics Valid=302, Invalid=936, Unknown=26, NotChecked=68, Total=1332 [2020-07-21 01:12:24,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-21 01:12:24,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2020-07-21 01:12:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 01:12:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-21 01:12:24,292 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 26 [2020-07-21 01:12:24,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:12:24,293 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-21 01:12:24,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 01:12:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-21 01:12:24,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 01:12:24,295 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:12:24,295 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] [2020-07-21 01:12:24,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:12:24,497 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:12:24,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:12:24,498 INFO L82 PathProgramCache]: Analyzing trace with hash -743556192, now seen corresponding path program 1 times [2020-07-21 01:12:24,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:12:24,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68380641] [2020-07-21 01:12:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:12:24,679 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:12:24,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:12:24,680 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:12:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:12:24,712 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:12:24,796 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:12:24,797 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:12:24,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:12:25,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:12:25 BoogieIcfgContainer [2020-07-21 01:12:25,082 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:12:25,085 INFO L168 Benchmark]: Toolchain (without parser) took 129196.17 ms. Allocated memory was 137.4 MB in the beginning and 281.5 MB in the end (delta: 144.2 MB). Free memory was 100.6 MB in the beginning and 240.2 MB in the end (delta: -139.7 MB). Peak memory consumption was 4.5 MB. Max. memory is 7.1 GB. [2020-07-21 01:12:25,086 INFO L168 Benchmark]: CDTParser took 1.27 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 01:12:25,087 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1040.14 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 100.1 MB in the beginning and 168.4 MB in the end (delta: -68.3 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:12:25,088 INFO L168 Benchmark]: Boogie Preprocessor took 157.58 ms. Allocated memory is still 201.9 MB. Free memory was 168.4 MB in the beginning and 165.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-21 01:12:25,089 INFO L168 Benchmark]: RCFGBuilder took 921.19 ms. Allocated memory is still 201.9 MB. Free memory was 165.7 MB in the beginning and 118.8 MB in the end (delta: 46.8 MB). Peak memory consumption was 46.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:12:25,090 INFO L168 Benchmark]: TraceAbstraction took 127065.98 ms. Allocated memory was 201.9 MB in the beginning and 281.5 MB in the end (delta: 79.7 MB). Free memory was 118.2 MB in the beginning and 240.2 MB in the end (delta: -122.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 01:12:25,094 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.27 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1040.14 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 100.1 MB in the beginning and 168.4 MB in the end (delta: -68.3 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 157.58 ms. Allocated memory is still 201.9 MB. Free memory was 168.4 MB in the beginning and 165.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 921.19 ms. Allocated memory is still 201.9 MB. Free memory was 165.7 MB in the beginning and 118.8 MB in the end (delta: 46.8 MB). Peak memory consumption was 46.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 127065.98 ms. Allocated memory was 201.9 MB in the beginning and 281.5 MB in the end (delta: 79.7 MB). Free memory was 118.2 MB in the beginning and 240.2 MB in the end (delta: -122.1 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 573]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = 1; [L522] List a = (List) malloc(sizeof(struct node)); VAL [a={-2:0}, flag=1, malloc(sizeof(struct node))={-2:0}] [L523] COND FALSE !(a == 0) VAL [a={-2:0}, flag=1, malloc(sizeof(struct node))={-2:0}] [L524] List t; [L525] List l1; [L526] List l2; [L527] List b; [L528] List u; [L529] List p = a; VAL [a={-2:0}, flag=1, malloc(sizeof(struct node))={-2:0}, p={-2:0}] [L530] COND TRUE __VERIFIER_nondet_int() [L531] COND TRUE \read(flag) [L532] p->h = 1 [L533] flag = 0 VAL [a={-2:0}, flag=0, malloc(sizeof(struct node))={-2:0}, p={-2:0}] [L538] t = (List) malloc(sizeof(struct node)) VAL [a={-2:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, t={-1:0}] [L539] COND FALSE !(t == 0) VAL [a={-2:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, t={-1:0}] [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L530] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 3 [L544] EXPR a->h VAL [a={-2:0}, a->h=1, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-1:0}] [L544] COND FALSE !(a->h == 3) [L545] flag = 1 [L546] l1 = 0 [L547] l2 = 0 [L548] p = a VAL [a={-2:0}, flag=1, l1={0:0}, l2={0:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, t={-1:0}] [L549] EXPR p->h VAL [a={-2:0}, flag=1, l1={0:0}, l2={0:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, p->h=1, t={-1:0}] [L549] COND TRUE p->h != 3 [L550] t = p [L551] EXPR p->n [L551] p = p->n [L552] COND TRUE \read(flag) [L553] t->n = l1 [L554] l1 = t [L555] flag = 0 VAL [a={-2:0}, flag=0, l1={-2:0}, l2={0:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L549] EXPR p->h VAL [a={-2:0}, flag=0, l1={-2:0}, l2={0:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->h=3, t={-2:0}] [L549] COND FALSE !(p->h != 3) [L562] p = l1 VAL [a={-2:0}, flag=0, l1={-2:0}, l2={0:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, t={-2:0}] [L563] COND TRUE p != 0 [L564] EXPR p->h VAL [a={-2:0}, flag=0, l1={-2:0}, l2={0:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, p->h=1, t={-2:0}] [L564] COND TRUE p->h != 2 [L573] __VERIFIER_error() VAL [a={-2:0}, flag=0, l1={-2:0}, l2={0:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, t={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 126.8s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 112.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 126 SDtfs, 126 SDslu, 214 SDs, 0 SdLazy, 261 SolverSat, 105 SolverUnsat, 32 SolverUnknown, 0 SolverNotchecked, 55.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 67.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 36 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 11.5s InterpolantComputationTime, 111 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 105 ConstructedInterpolants, 11 QuantifiedInterpolants, 15660 SizeOfPredicates, 27 NumberOfNonLiveVariables, 385 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 2/6 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...