/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 2 -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 13:39:01,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:39:01,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:39:01,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:39:01,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:39:01,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:39:01,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:39:01,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:39:01,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:39:01,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:39:01,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:39:01,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:39:01,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:39:01,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:39:01,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:39:01,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:39:01,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:39:01,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:39:01,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:39:01,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:39:01,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:39:01,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:39:01,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:39:01,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:39:01,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 13:39:01,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 13:39:01,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 13:39:01,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 13:39:01,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 13:39:01,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 13:39:01,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 13:39:01,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 13:39:01,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 13:39:01,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 13:39:01,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 13:39:01,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 13:39:01,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 13:39:01,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 13:39:01,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:39:01,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:39:01,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:39:01,385 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 13:39:01,400 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:39:01,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:39:01,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:39:01,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:39:01,401 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:39:01,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:39:01,402 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:39:01,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:39:01,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:39:01,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:39:01,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:39:01,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:39:01,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:39:01,403 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:39:01,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:39:01,404 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:39:01,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:39:01,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:39:01,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:39:01,404 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:39:01,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:39:01,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:39:01,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:39:01,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:39:01,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:39:01,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:39:01,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:39:01,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:39:01,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:39:01,406 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 -> 2 [2020-07-21 13:39:01,689 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:39:01,702 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:39:01,706 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:39:01,707 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:39:01,707 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:39:01,708 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-1.i [2020-07-21 13:39:01,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b3116826/e9e8908862f84bf7bd2349d2d5d4099d/FLAGd6a2728e7 [2020-07-21 13:39:02,362 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:39:02,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/splice-1.i [2020-07-21 13:39:02,376 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b3116826/e9e8908862f84bf7bd2349d2d5d4099d/FLAGd6a2728e7 [2020-07-21 13:39:02,622 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b3116826/e9e8908862f84bf7bd2349d2d5d4099d [2020-07-21 13:39:02,632 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:39:02,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:39:02,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:39:02,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:39:02,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:39:02,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:39:02" (1/1) ... [2020-07-21 13:39:02,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1226146e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:02, skipping insertion in model container [2020-07-21 13:39:02,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:39:02" (1/1) ... [2020-07-21 13:39:02,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:39:02,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:39:03,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:39:03,104 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:39:03,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:39:03,219 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:39:03,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:03 WrapperNode [2020-07-21 13:39:03,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:39:03,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:39:03,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:39:03,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:39:03,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:03" (1/1) ... [2020-07-21 13:39:03,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:03" (1/1) ... [2020-07-21 13:39:03,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:03" (1/1) ... [2020-07-21 13:39:03,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:03" (1/1) ... [2020-07-21 13:39:03,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:03" (1/1) ... [2020-07-21 13:39:03,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:03" (1/1) ... [2020-07-21 13:39:03,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:03" (1/1) ... [2020-07-21 13:39:03,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:39:03,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:39:03,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:39:03,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:39:03,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:03" (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 13:39:03,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:39:03,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:39:03,374 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 13:39:03,374 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 13:39:03,374 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-21 13:39:03,374 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-21 13:39:03,375 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-21 13:39:03,375 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-21 13:39:03,375 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:39:03,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:39:03,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:39:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 13:39:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 13:39:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 13:39:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 13:39:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 13:39:03,376 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 13:39:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 13:39:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 13:39:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 13:39:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 13:39:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 13:39:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 13:39:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 13:39:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 13:39:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 13:39:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 13:39:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 13:39:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 13:39:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-21 13:39:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-21 13:39:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-21 13:39:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 13:39:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 13:39:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 13:39:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 13:39:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 13:39:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 13:39:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 13:39:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 13:39:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 13:39:03,379 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 13:39:03,380 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 13:39:03,380 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 13:39:03,380 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 13:39:03,380 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 13:39:03,380 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 13:39:03,380 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 13:39:03,380 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 13:39:03,380 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 13:39:03,380 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 13:39:03,380 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 13:39:03,380 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 13:39:03,381 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 13:39:03,381 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 13:39:03,381 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 13:39:03,381 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 13:39:03,381 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 13:39:03,381 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 13:39:03,381 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 13:39:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 13:39:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 13:39:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 13:39:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 13:39:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 13:39:03,382 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 13:39:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 13:39:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 13:39:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 13:39:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 13:39:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 13:39:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 13:39:03,383 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 13:39:03,384 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 13:39:03,384 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 13:39:03,384 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 13:39:03,384 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 13:39:03,384 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 13:39:03,384 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 13:39:03,385 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 13:39:03,385 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 13:39:03,385 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 13:39:03,385 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 13:39:03,385 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 13:39:03,385 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 13:39:03,385 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 13:39:03,386 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 13:39:03,386 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 13:39:03,386 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 13:39:03,386 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 13:39:03,386 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 13:39:03,386 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 13:39:03,387 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 13:39:03,387 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 13:39:03,387 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 13:39:03,387 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 13:39:03,387 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 13:39:03,387 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 13:39:03,387 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 13:39:03,388 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 13:39:03,388 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 13:39:03,388 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 13:39:03,388 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 13:39:03,388 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 13:39:03,388 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 13:39:03,388 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 13:39:03,389 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 13:39:03,389 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 13:39:03,389 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 13:39:03,389 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 13:39:03,389 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 13:39:03,389 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 13:39:03,389 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 13:39:03,390 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 13:39:03,390 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 13:39:03,390 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 13:39:03,390 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 13:39:03,390 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 13:39:03,390 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-21 13:39:03,390 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:39:03,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 13:39:03,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 13:39:03,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 13:39:03,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 13:39:03,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 13:39:03,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:39:03,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:39:03,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 13:39:03,751 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-21 13:39:03,958 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:39:03,958 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-21 13:39:03,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:39:03 BoogieIcfgContainer [2020-07-21 13:39:03,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:39:03,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:39:03,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:39:03,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:39:03,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:39:02" (1/3) ... [2020-07-21 13:39:03,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20807bbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:39:03, skipping insertion in model container [2020-07-21 13:39:03,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:03" (2/3) ... [2020-07-21 13:39:03,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20807bbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:39:03, skipping insertion in model container [2020-07-21 13:39:03,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:39:03" (3/3) ... [2020-07-21 13:39:03,972 INFO L109 eAbstractionObserver]: Analyzing ICFG splice-1.i [2020-07-21 13:39:03,982 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:39:03,990 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:39:04,004 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:39:04,027 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:39:04,028 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:39:04,028 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:39:04,028 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:39:04,028 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:39:04,028 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:39:04,029 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:39:04,029 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:39:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-21 13:39:04,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 13:39:04,054 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:39:04,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:39:04,055 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:39:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:39:04,062 INFO L82 PathProgramCache]: Analyzing trace with hash 661731879, now seen corresponding path program 1 times [2020-07-21 13:39:04,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:39:04,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030839577] [2020-07-21 13:39:04,071 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:39:04,256 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 13:39:04,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:39:04,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:39:04,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:39:04,339 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 13:39:04,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:39:04,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030839577] [2020-07-21 13:39:04,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:39:04,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 13:39:04,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782732773] [2020-07-21 13:39:04,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 13:39:04,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:39:04,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 13:39:04,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 13:39:04,365 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-07-21 13:39:04,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:39:04,470 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2020-07-21 13:39:04,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 13:39:04,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-21 13:39:04,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:39:04,481 INFO L225 Difference]: With dead ends: 68 [2020-07-21 13:39:04,481 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 13:39:04,484 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 [2020-07-21 13:39:04,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 13:39:04,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-07-21 13:39:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 13:39:04,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-07-21 13:39:04,525 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 16 [2020-07-21 13:39:04,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:39:04,526 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-07-21 13:39:04,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 13:39:04,526 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-07-21 13:39:04,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 13:39:04,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:39:04,527 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 13:39:04,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:39:04,742 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:39:04,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:39:04,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1925443576, now seen corresponding path program 1 times [2020-07-21 13:39:04,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:39:04,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500391673] [2020-07-21 13:39:04,744 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:39:04,874 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:39:04,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:39:04,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 13:39:04,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:39:04,907 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 13:39:04,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:39:04,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500391673] [2020-07-21 13:39:04,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:39:04,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 13:39:04,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277885408] [2020-07-21 13:39:04,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 13:39:04,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:39:04,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 13:39:04,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 13:39:04,911 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2020-07-21 13:39:04,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:39:04,961 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-07-21 13:39:04,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:39:04,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-21 13:39:04,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:39:04,963 INFO L225 Difference]: With dead ends: 46 [2020-07-21 13:39:04,963 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 13:39:04,964 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 13:39:04,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 13:39:04,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-07-21 13:39:04,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 13:39:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-07-21 13:39:04,970 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 24 [2020-07-21 13:39:04,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:39:04,971 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-07-21 13:39:04,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 13:39:04,971 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-07-21 13:39:04,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 13:39:04,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:39:04,972 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 13:39:05,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:39:05,187 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:39:05,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:39:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash 777953469, now seen corresponding path program 1 times [2020-07-21 13:39:05,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:39:05,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127146996] [2020-07-21 13:39:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:39:05,319 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:39:05,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:39:05,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-21 13:39:05,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:39:05,377 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 13:39:05,378 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:05,390 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:05,391 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:39:05,392 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-21 13:39:05,425 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 13:39:05,426 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:05,440 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:05,441 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:39:05,441 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-07-21 13:39:05,475 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:05,476 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 13:39:05,477 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:05,487 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:05,487 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:39:05,488 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:21 [2020-07-21 13:39:05,516 INFO L440 ElimStorePlain]: Different costs {0=[|#memory_$Pointer$.offset|], 2=[|v_#memory_int_20|]} [2020-07-21 13:39:05,521 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2020-07-21 13:39:05,521 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:05,531 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:05,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 13:39:05,537 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-07-21 13:39:05,538 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:05,545 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:05,546 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:39:05,546 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:15 [2020-07-21 13:39:05,571 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 13:39:05,572 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:05,581 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:05,583 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 13:39:05,583 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:22 [2020-07-21 13:39:05,647 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 13:39:05,648 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 13:39:05,653 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:05,654 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 13:39:05,654 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-07-21 13:39:05,702 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 13:39:05,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:39:05,773 INFO L440 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_19|], 3=[|v_#memory_int_23|]} [2020-07-21 13:39:05,777 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 21 treesize of output 15 [2020-07-21 13:39:05,778 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 13:39:05,785 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:05,790 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 13:39:05,793 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 13:39:05,794 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-21 13:39:05,794 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:35 [2020-07-21 13:39:06,444 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_8 Int) (v_DerPreprocessor_1 Int)) (< (select (select (let ((.cse0 (store |c_#memory_int| c_main_~p~0.base (store (select |c_#memory_int| c_main_~p~0.base) (+ c_main_~p~0.offset 4) v_DerPreprocessor_1)))) (store .cse0 c_main_~t~0.base (store (select .cse0 c_main_~t~0.base) v_arrayElimCell_8 3))) c_main_~a~0.base) c_main_~a~0.offset) 3)) is different from false [2020-07-21 13:39:06,518 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 236 treesize of output 228 [2020-07-21 13:39:06,520 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:39:06,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:39:06,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:39:06,524 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:39:06,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:39:06,529 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:39:06,540 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2020-07-21 13:39:06,721 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2020-07-21 13:39:06,722 INFO L624 ElimStorePlain]: treesize reduction 445, result has 10.1 percent of original size [2020-07-21 13:39:06,726 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:39:06,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:39:06,730 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 13:39:06,730 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:48, output treesize:50 [2020-07-21 13:39:06,733 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:39:06,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:39:06,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:39:07,443 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:39:07,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:39:09,533 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:39:09,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:39:11,599 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:39:11,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:39:11,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:39:11,655 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 13:39:11,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127146996] [2020-07-21 13:39:11,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:39:11,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-21 13:39:11,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147655771] [2020-07-21 13:39:11,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 13:39:11,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:39:11,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 13:39:11,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=220, Unknown=2, NotChecked=30, Total=306 [2020-07-21 13:39:11,658 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 18 states. [2020-07-21 13:39:13,328 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2020-07-21 13:39:13,925 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2020-07-21 13:39:27,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:39:27,444 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2020-07-21 13:39:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 13:39:27,445 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-07-21 13:39:27,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:39:27,448 INFO L225 Difference]: With dead ends: 73 [2020-07-21 13:39:27,448 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 13:39:27,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=230, Invalid=752, Unknown=14, NotChecked=60, Total=1056 [2020-07-21 13:39:27,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 13:39:27,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2020-07-21 13:39:27,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 13:39:27,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-21 13:39:27,458 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 26 [2020-07-21 13:39:27,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:39:27,458 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-21 13:39:27,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 13:39:27,458 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-21 13:39:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 13:39:27,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:39:27,460 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 13:39:27,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:39:27,672 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:39:27,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:39:27,673 INFO L82 PathProgramCache]: Analyzing trace with hash -743556192, now seen corresponding path program 1 times [2020-07-21 13:39:27,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:39:27,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246283350] [2020-07-21 13:39:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 13:39:27,861 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:39:27,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 13:39:27,861 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:39:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 13:39:27,897 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 13:39:27,944 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 13:39:27,945 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 13:39:28,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:39:28,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:39:28 BoogieIcfgContainer [2020-07-21 13:39:28,206 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 13:39:28,207 INFO L168 Benchmark]: Toolchain (without parser) took 25574.08 ms. Allocated memory was 145.8 MB in the beginning and 248.5 MB in the end (delta: 102.8 MB). Free memory was 102.0 MB in the beginning and 124.7 MB in the end (delta: -22.7 MB). Peak memory consumption was 80.1 MB. Max. memory is 7.1 GB. [2020-07-21 13:39:28,208 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 13:39:28,208 INFO L168 Benchmark]: CACSL2BoogieTranslator took 584.25 ms. Allocated memory was 145.8 MB in the beginning and 204.5 MB in the end (delta: 58.7 MB). Free memory was 101.6 MB in the beginning and 171.5 MB in the end (delta: -69.9 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2020-07-21 13:39:28,209 INFO L168 Benchmark]: Boogie Preprocessor took 81.66 ms. Allocated memory is still 204.5 MB. Free memory was 171.5 MB in the beginning and 167.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 7.1 GB. [2020-07-21 13:39:28,210 INFO L168 Benchmark]: RCFGBuilder took 661.32 ms. Allocated memory is still 204.5 MB. Free memory was 167.9 MB in the beginning and 121.7 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. [2020-07-21 13:39:28,211 INFO L168 Benchmark]: TraceAbstraction took 24241.16 ms. Allocated memory was 204.5 MB in the beginning and 248.5 MB in the end (delta: 44.0 MB). Free memory was 121.1 MB in the beginning and 124.7 MB in the end (delta: -3.6 MB). Peak memory consumption was 40.4 MB. Max. memory is 7.1 GB. [2020-07-21 13:39:28,214 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 584.25 ms. Allocated memory was 145.8 MB in the beginning and 204.5 MB in the end (delta: 58.7 MB). Free memory was 101.6 MB in the beginning and 171.5 MB in the end (delta: -69.9 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 81.66 ms. Allocated memory is still 204.5 MB. Free memory was 171.5 MB in the beginning and 167.9 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 661.32 ms. Allocated memory is still 204.5 MB. Free memory was 167.9 MB in the beginning and 121.7 MB in the end (delta: 46.2 MB). Peak memory consumption was 46.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24241.16 ms. Allocated memory was 204.5 MB in the beginning and 248.5 MB in the end (delta: 44.0 MB). Free memory was 121.1 MB in the beginning and 124.7 MB in the end (delta: -3.6 MB). Peak memory consumption was 40.4 MB. 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))={17067:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={17067:0}] [L539] COND FALSE !(t == 0) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={17067:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={17067:0}] [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))={17067:0}, malloc(sizeof(struct node))={-1:0}, p={17067:0}, t={17067:0}] [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))={17067:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={17067:0}] [L549] EXPR p->h VAL [a={-1:0}, flag=1, l1={0:0}, l2={0:0}, malloc(sizeof(struct node))={17067:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={17067:0}] [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))={17067:0}, malloc(sizeof(struct node))={-1:0}, p={17067:0}, t={-1:0}] [L549] EXPR p->h VAL [a={-1:0}, flag=0, l1={-1:0}, l2={0:0}, malloc(sizeof(struct node))={17067:0}, malloc(sizeof(struct node))={-1:0}, p={17067:0}, 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))={17067:0}, 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))={17067:0}, malloc(sizeof(struct node))={-1:0}, 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))={17067:0}, malloc(sizeof(struct node))={-1:0}, 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: 24.1s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 15.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 92 SDtfs, 98 SDslu, 261 SDs, 0 SdLazy, 308 SolverSat, 78 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 7.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 107 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 14.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred 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, 28 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.4s InterpolantComputationTime, 93 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 88 ConstructedInterpolants, 8 QuantifiedInterpolants, 16191 SizeOfPredicates, 29 NumberOfNonLiveVariables, 296 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 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...