/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 NUM_FUNCTIONS --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 [2020-07-20 13:51:24,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:51:24,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:51:24,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:51:24,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:51:24,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:51:24,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:51:24,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:51:24,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:51:24,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:51:24,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:51:24,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:51:24,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:51:24,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:51:24,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:51:24,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:51:24,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:51:24,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:51:24,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:51:24,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:51:24,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:51:24,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:51:24,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:51:24,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:51:24,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 13:51:24,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 13:51:24,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 13:51:24,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 13:51:24,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 13:51:24,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 13:51:24,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 13:51:24,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 13:51:24,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 13:51:24,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 13:51:24,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 13:51:24,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 13:51:24,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 13:51:24,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 13:51:24,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:51:24,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:51:24,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:51:24,092 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 13:51:24,107 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:51:24,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:51:24,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:51:24,109 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:51:24,109 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:51:24,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:51:24,110 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:51:24,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:51:24,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:51:24,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:51:24,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:51:24,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:51:24,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:51:24,111 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:51:24,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:51:24,112 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:51:24,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:51:24,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:51:24,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:51:24,113 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:51:24,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:51:24,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:51:24,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:51:24,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:51:24,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:51:24,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:51:24,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:51:24,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:51:24,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:51:24,115 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 -> NUM_FUNCTIONS 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 [2020-07-20 13:51:24,440 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:51:24,459 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:51:24,464 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:51:24,465 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:51:24,468 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:51:24,469 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-1.i [2020-07-20 13:51:24,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad176a4b4/1783ff67b0a94258aac41cfad47c6295/FLAGb713f3a34 [2020-07-20 13:51:25,158 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:51:25,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/splice-1.i [2020-07-20 13:51:25,177 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad176a4b4/1783ff67b0a94258aac41cfad47c6295/FLAGb713f3a34 [2020-07-20 13:51:25,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad176a4b4/1783ff67b0a94258aac41cfad47c6295 [2020-07-20 13:51:25,475 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:51:25,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:51:25,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:51:25,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:51:25,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:51:25,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:51:25" (1/1) ... [2020-07-20 13:51:25,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b1ca428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:25, skipping insertion in model container [2020-07-20 13:51:25,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:51:25" (1/1) ... [2020-07-20 13:51:25,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:51:25,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:51:26,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:51:26,078 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:51:26,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:51:26,201 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:51:26,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26 WrapperNode [2020-07-20 13:51:26,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:51:26,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:51:26,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:51:26,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:51:26,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (1/1) ... [2020-07-20 13:51:26,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (1/1) ... [2020-07-20 13:51:26,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (1/1) ... [2020-07-20 13:51:26,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (1/1) ... [2020-07-20 13:51:26,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (1/1) ... [2020-07-20 13:51:26,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (1/1) ... [2020-07-20 13:51:26,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (1/1) ... [2020-07-20 13:51:26,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:51:26,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:51:26,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:51:26,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:51:26,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (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 13:51:26,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:51:26,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:51:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-20 13:51:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-20 13:51:26,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-20 13:51:26,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-20 13:51:26,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-20 13:51:26,369 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-20 13:51:26,370 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:51:26,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:51:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:51:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-20 13:51:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-20 13:51:26,371 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-20 13:51:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-20 13:51:26,372 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-20 13:51:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-20 13:51:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-20 13:51:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-20 13:51:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-20 13:51:26,373 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-20 13:51:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-20 13:51:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-20 13:51:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-20 13:51:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-20 13:51:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-20 13:51:26,375 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-20 13:51:26,376 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-20 13:51:26,377 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-20 13:51:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-20 13:51:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-20 13:51:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-20 13:51:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-20 13:51:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-20 13:51:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-20 13:51:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-20 13:51:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-20 13:51:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-20 13:51:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-20 13:51:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-20 13:51:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-20 13:51:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-20 13:51:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-20 13:51:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-20 13:51:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-20 13:51:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-20 13:51:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-20 13:51:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-20 13:51:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-20 13:51:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-20 13:51:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-20 13:51:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-20 13:51:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-20 13:51:26,382 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-20 13:51:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-20 13:51:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-20 13:51:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-20 13:51:26,383 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-20 13:51:26,384 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-20 13:51:26,384 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-20 13:51:26,384 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-20 13:51:26,384 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-20 13:51:26,384 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-20 13:51:26,385 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-20 13:51:26,385 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-20 13:51:26,385 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-20 13:51:26,385 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 13:51:26,386 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 13:51:26,386 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-20 13:51:26,386 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 13:51:26,387 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-20 13:51:26,387 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-20 13:51:26,387 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-20 13:51:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-20 13:51:26,388 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 13:51:26,389 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-20 13:51:26,389 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-20 13:51:26,389 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-20 13:51:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-20 13:51:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-20 13:51:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-20 13:51:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-20 13:51:26,390 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-20 13:51:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-20 13:51:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-20 13:51:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-20 13:51:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-20 13:51:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-20 13:51:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-20 13:51:26,392 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-20 13:51:26,392 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-20 13:51:26,392 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-20 13:51:26,392 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-20 13:51:26,392 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-20 13:51:26,392 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-20 13:51:26,392 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-20 13:51:26,393 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-20 13:51:26,393 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-20 13:51:26,393 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-20 13:51:26,393 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-20 13:51:26,393 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-20 13:51:26,393 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-20 13:51:26,393 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-20 13:51:26,394 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-20 13:51:26,394 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-20 13:51:26,394 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-20 13:51:26,394 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-20 13:51:26,394 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-20 13:51:26,394 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-20 13:51:26,395 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-20 13:51:26,395 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-20 13:51:26,395 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-20 13:51:26,395 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-20 13:51:26,395 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-20 13:51:26,395 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-20 13:51:26,395 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-20 13:51:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-20 13:51:26,397 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-20 13:51:26,397 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-20 13:51:26,397 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:51:26,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 13:51:26,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 13:51:26,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 13:51:26,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 13:51:26,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 13:51:26,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:51:26,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:51:26,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 13:51:26,822 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-20 13:51:27,062 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:51:27,065 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 13:51:27,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:51:27 BoogieIcfgContainer [2020-07-20 13:51:27,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:51:27,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:51:27,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:51:27,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:51:27,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:51:25" (1/3) ... [2020-07-20 13:51:27,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461c1dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:51:27, skipping insertion in model container [2020-07-20 13:51:27,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (2/3) ... [2020-07-20 13:51:27,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461c1dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:51:27, skipping insertion in model container [2020-07-20 13:51:27,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:51:27" (3/3) ... [2020-07-20 13:51:27,085 INFO L109 eAbstractionObserver]: Analyzing ICFG splice-1.i [2020-07-20 13:51:27,097 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:51:27,118 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:51:27,134 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:51:27,169 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:51:27,169 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:51:27,169 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:51:27,170 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:51:27,170 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:51:27,170 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:51:27,170 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:51:27,170 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:51:27,199 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-20 13:51:27,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 13:51:27,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:51:27,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:51:27,212 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:51:27,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:51:27,220 INFO L82 PathProgramCache]: Analyzing trace with hash 661731879, now seen corresponding path program 1 times [2020-07-20 13:51:27,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:51:27,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358196661] [2020-07-20 13:51:27,233 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 [2020-07-20 13:51:27,450 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:51:27,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:51:27,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:51:27,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:51:27,540 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 13:51:27,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:51:27,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358196661] [2020-07-20 13:51:27,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:51:27,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:51:27,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457353561] [2020-07-20 13:51:27,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:51:27,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:51:27,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:51:27,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:51:27,569 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-07-20 13:51:27,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:51:27,691 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2020-07-20 13:51:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 13:51:27,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-20 13:51:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:51:27,706 INFO L225 Difference]: With dead ends: 68 [2020-07-20 13:51:27,707 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 13:51:27,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:51:27,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 13:51:27,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-07-20 13:51:27,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 13:51:27,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-07-20 13:51:27,765 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 16 [2020-07-20 13:51:27,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:51:27,766 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-07-20 13:51:27,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:51:27,767 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-07-20 13:51:27,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 13:51:27,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:51:27,768 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] [2020-07-20 13:51:27,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:51:27,984 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:51:27,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:51:27,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1925443576, now seen corresponding path program 1 times [2020-07-20 13:51:27,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:51:27,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259753770] [2020-07-20 13:51:27,985 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 [2020-07-20 13:51:28,149 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:51:28,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:51:28,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 13:51:28,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:51:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 13:51:28,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:51:28,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259753770] [2020-07-20 13:51:28,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:51:28,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:51:28,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167412676] [2020-07-20 13:51:28,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:51:28,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:51:28,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:51:28,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:51:28,185 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2020-07-20 13:51:28,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:51:28,249 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-07-20 13:51:28,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:51:28,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-20 13:51:28,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:51:28,251 INFO L225 Difference]: With dead ends: 46 [2020-07-20 13:51:28,252 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 13:51:28,254 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 [2020-07-20 13:51:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 13:51:28,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-07-20 13:51:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 13:51:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-07-20 13:51:28,261 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 24 [2020-07-20 13:51:28,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:51:28,262 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-07-20 13:51:28,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:51:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-07-20 13:51:28,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 13:51:28,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:51:28,264 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] [2020-07-20 13:51:28,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:51:28,479 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:51:28,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:51:28,480 INFO L82 PathProgramCache]: Analyzing trace with hash 777953469, now seen corresponding path program 1 times [2020-07-20 13:51:28,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:51:28,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541080319] [2020-07-20 13:51:28,481 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 [2020-07-20 13:51:28,620 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:51:28,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:51:28,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 13:51:28,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:51:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 13:51:28,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:51:28,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541080319] [2020-07-20 13:51:28,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:51:28,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 13:51:28,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623030417] [2020-07-20 13:51:28,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 13:51:28,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:51:28,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 13:51:28,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 13:51:28,684 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 4 states. [2020-07-20 13:51:28,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:51:28,755 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-07-20 13:51:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:51:28,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-07-20 13:51:28,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:51:28,760 INFO L225 Difference]: With dead ends: 53 [2020-07-20 13:51:28,760 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 13:51:28,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:51:28,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 13:51:28,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-07-20 13:51:28,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 13:51:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-07-20 13:51:28,771 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 26 [2020-07-20 13:51:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:51:28,772 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-07-20 13:51:28,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 13:51:28,772 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-07-20 13:51:28,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:51:28,773 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:51:28,774 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] [2020-07-20 13:51:28,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:51:28,985 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:51:28,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:51:28,986 INFO L82 PathProgramCache]: Analyzing trace with hash -743556192, now seen corresponding path program 1 times [2020-07-20 13:51:28,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:51:28,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061028665] [2020-07-20 13:51:28,988 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 [2020-07-20 13:51:29,191 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:51:29,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 13:51:29,192 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:51:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 13:51:29,228 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 13:51:29,262 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 13:51:29,263 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 13:51:29,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:51:29,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:51:29 BoogieIcfgContainer [2020-07-20 13:51:29,528 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 13:51:29,535 INFO L168 Benchmark]: Toolchain (without parser) took 4053.06 ms. Allocated memory was 137.9 MB in the beginning and 251.7 MB in the end (delta: 113.8 MB). Free memory was 100.3 MB in the beginning and 209.9 MB in the end (delta: -109.6 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-07-20 13:51:29,536 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 13:51:29,542 INFO L168 Benchmark]: CACSL2BoogieTranslator took 723.67 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 99.9 MB in the beginning and 169.6 MB in the end (delta: -69.7 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:51:29,543 INFO L168 Benchmark]: Boogie Preprocessor took 77.53 ms. Allocated memory is still 202.9 MB. Free memory was 169.6 MB in the beginning and 166.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-20 13:51:29,544 INFO L168 Benchmark]: RCFGBuilder took 792.11 ms. Allocated memory is still 202.9 MB. Free memory was 166.9 MB in the beginning and 120.1 MB in the end (delta: 46.8 MB). Peak memory consumption was 46.8 MB. Max. memory is 7.1 GB. [2020-07-20 13:51:29,545 INFO L168 Benchmark]: TraceAbstraction took 2452.60 ms. Allocated memory was 202.9 MB in the beginning and 251.7 MB in the end (delta: 48.8 MB). Free memory was 119.4 MB in the beginning and 209.9 MB in the end (delta: -90.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 13:51:29,549 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 723.67 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 99.9 MB in the beginning and 169.6 MB in the end (delta: -69.7 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 77.53 ms. Allocated memory is still 202.9 MB. Free memory was 169.6 MB in the beginning and 166.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 792.11 ms. Allocated memory is still 202.9 MB. Free memory was 166.9 MB in the beginning and 120.1 MB in the end (delta: 46.8 MB). Peak memory consumption was 46.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2452.60 ms. Allocated memory was 202.9 MB in the beginning and 251.7 MB in the end (delta: 48.8 MB). Free memory was 119.4 MB in the beginning and 209.9 MB in the end (delta: -90.5 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={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L523] COND FALSE !(a == 0) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L524] List t; [L525] List l1; [L526] List l2; [L527] List b; [L528] List u; [L529] List p = a; VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L530] COND TRUE __VERIFIER_nondet_int() [L531] COND TRUE \read(flag) [L532] p->h = 1 [L533] flag = 0 VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L538] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={31598:0}, p={-1:0}, t={31598:0}] [L539] COND FALSE !(t == 0) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={31598:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={31598:0}] [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={-1:0}, a->h=1, flag=0, malloc(sizeof(struct node))={31598:0}, malloc(sizeof(struct node))={-1:0}, p={31598:0}, t={31598:0}] [L544] COND FALSE !(a->h == 3) [L545] flag = 1 [L546] l1 = 0 [L547] l2 = 0 [L548] p = a VAL [a={-1:0}, flag=1, l1={0:0}, l2={0:0}, malloc(sizeof(struct node))={31598:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={31598:0}] [L549] EXPR p->h VAL [a={-1:0}, flag=1, l1={0:0}, l2={0:0}, malloc(sizeof(struct node))={31598:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={31598:0}] [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={-1:0}, flag=0, l1={-1:0}, l2={0:0}, malloc(sizeof(struct node))={31598:0}, malloc(sizeof(struct node))={-1:0}, p={31598:0}, t={-1:0}] [L549] EXPR p->h VAL [a={-1:0}, flag=0, l1={-1:0}, l2={0:0}, malloc(sizeof(struct node))={31598:0}, malloc(sizeof(struct node))={-1:0}, p={31598:0}, p->h=3, t={-1:0}] [L549] COND FALSE !(p->h != 3) [L562] p = l1 VAL [a={-1:0}, flag=0, l1={-1:0}, l2={0:0}, malloc(sizeof(struct node))={31598:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-1:0}] [L563] COND TRUE p != 0 [L564] EXPR p->h VAL [a={-1:0}, flag=0, l1={-1:0}, l2={0:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={31598:0}, p={-1:0}, p->h=1, t={-1:0}] [L564] COND TRUE p->h != 2 [L573] __VERIFIER_error() VAL [a={-1:0}, flag=0, l1={-1:0}, l2={0:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={31598:0}, p={-1:0}, t={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 99 SDtfs, 28 SDslu, 155 SDs, 0 SdLazy, 73 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=3, 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, 3 MinimizatonAttempts, 14 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 93 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 3041 SizeOfPredicates, 13 NumberOfNonLiveVariables, 261 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 4/4 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...