/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:14:41,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:14:41,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:14:41,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:14:41,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:14:41,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:14:41,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:14:41,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:14:41,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:14:41,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:14:41,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:14:41,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:14:41,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:14:41,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:14:41,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:14:41,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:14:41,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:14:41,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:14:41,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:14:41,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:14:41,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:14:41,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:14:41,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:14:41,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:14:41,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 01:14:41,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 01:14:41,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 01:14:41,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 01:14:41,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 01:14:41,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 01:14:41,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 01:14:41,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 01:14:41,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 01:14:41,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 01:14:41,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 01:14:41,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 01:14:41,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 01:14:41,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 01:14:41,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:14:41,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:14:41,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:14:41,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 01:14:41,234 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:14:41,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:14:41,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:14:41,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:14:41,237 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:14:41,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:14:41,237 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:14:41,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:14:41,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:14:41,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:14:41,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:14:41,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:14:41,239 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:14:41,240 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:14:41,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:14:41,240 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:14:41,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:14:41,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:14:41,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:14:41,241 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:14:41,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:14:41,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:14:41,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:14:41,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:14:41,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:14:41,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:14:41,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:41,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:14:41,243 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:14:41,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:14:41,576 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:14:41,594 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:14:41,598 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:14:41,600 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:14:41,600 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:14:41,601 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-07-21 01:14:41,692 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/578b4680d/af3e43f470744094abc202658569add8/FLAG1ae00fd32 [2020-07-21 01:14:42,253 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:14:42,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-07-21 01:14:42,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/578b4680d/af3e43f470744094abc202658569add8/FLAG1ae00fd32 [2020-07-21 01:14:42,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/578b4680d/af3e43f470744094abc202658569add8 [2020-07-21 01:14:42,576 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:14:42,579 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:14:42,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:14:42,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:14:42,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:14:42,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:14:42" (1/1) ... [2020-07-21 01:14:42,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c2043f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:42, skipping insertion in model container [2020-07-21 01:14:42,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:14:42" (1/1) ... [2020-07-21 01:14:42,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:14:42,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:14:43,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:14:43,114 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:14:43,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:14:43,221 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:14:43,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:43 WrapperNode [2020-07-21 01:14:43,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:14:43,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:14:43,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:14:43,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:14:43,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:43" (1/1) ... [2020-07-21 01:14:43,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:43" (1/1) ... [2020-07-21 01:14:43,257 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:43" (1/1) ... [2020-07-21 01:14:43,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:43" (1/1) ... [2020-07-21 01:14:43,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:43" (1/1) ... [2020-07-21 01:14:43,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:43" (1/1) ... [2020-07-21 01:14:43,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:43" (1/1) ... [2020-07-21 01:14:43,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:14:43,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:14:43,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:14:43,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:14:43,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:14:43,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:14:43,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:14:43,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:14:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 01:14:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 01:14:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 01:14:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 01:14:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 01:14:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 01:14:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 01:14:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 01:14:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 01:14:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 01:14:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 01:14:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 01:14:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 01:14:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 01:14:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 01:14:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 01:14:43,399 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 01:14:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 01:14:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 01:14:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 01:14:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 01:14:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 01:14:43,400 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 01:14:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 01:14:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 01:14:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 01:14:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 01:14:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 01:14:43,401 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 01:14:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 01:14:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 01:14:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 01:14:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 01:14:43,402 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 01:14:43,403 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 01:14:43,403 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 01:14:43,403 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 01:14:43,403 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 01:14:43,403 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 01:14:43,403 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 01:14:43,403 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 01:14:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 01:14:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 01:14:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 01:14:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 01:14:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 01:14:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 01:14:43,404 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 01:14:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 01:14:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 01:14:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 01:14:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 01:14:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 01:14:43,405 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 01:14:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 01:14:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 01:14:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 01:14:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 01:14:43,406 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 01:14:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:14:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 01:14:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 01:14:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 01:14:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 01:14:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 01:14:43,407 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 01:14:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 01:14:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 01:14:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 01:14:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 01:14:43,408 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 01:14:43,409 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 01:14:43,409 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 01:14:43,409 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 01:14:43,409 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 01:14:43,409 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 01:14:43,409 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 01:14:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 01:14:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 01:14:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 01:14:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 01:14:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 01:14:43,410 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 01:14:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 01:14:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 01:14:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 01:14:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 01:14:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 01:14:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 01:14:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 01:14:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 01:14:43,411 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 01:14:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 01:14:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 01:14:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 01:14:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 01:14:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 01:14:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 01:14:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 01:14:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 01:14:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 01:14:43,412 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 01:14:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 01:14:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:14:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:14:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:14:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 01:14:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 01:14:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 01:14:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:14:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:14:43,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:14:44,157 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:14:44,157 INFO L295 CfgBuilder]: Removed 30 assume(true) statements. [2020-07-21 01:14:44,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:14:44 BoogieIcfgContainer [2020-07-21 01:14:44,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:14:44,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:14:44,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:14:44,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:14:44,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:14:42" (1/3) ... [2020-07-21 01:14:44,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab6465b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:14:44, skipping insertion in model container [2020-07-21 01:14:44,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:43" (2/3) ... [2020-07-21 01:14:44,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab6465b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:14:44, skipping insertion in model container [2020-07-21 01:14:44,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:14:44" (3/3) ... [2020-07-21 01:14:44,182 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-07-21 01:14:44,194 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:14:44,205 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-07-21 01:14:44,222 INFO L251 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-07-21 01:14:44,262 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:14:44,263 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:14:44,267 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:14:44,267 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:14:44,267 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:14:44,268 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:14:44,268 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:14:44,268 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:14:44,297 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-07-21 01:14:44,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-21 01:14:44,303 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:44,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:44,305 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:44,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454184, now seen corresponding path program 1 times [2020-07-21 01:14:44,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:44,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458338575] [2020-07-21 01:14:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:44,520 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:14:44,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:44,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:14:44,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:14:44,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:44,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458338575] [2020-07-21 01:14:44,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:44,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:14:44,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561242422] [2020-07-21 01:14:44,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:14:44,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:44,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:14:44,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:14:44,608 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 3 states. [2020-07-21 01:14:44,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:14:44,709 INFO L93 Difference]: Finished difference Result 186 states and 302 transitions. [2020-07-21 01:14:44,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:14:44,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-21 01:14:44,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:14:44,732 INFO L225 Difference]: With dead ends: 186 [2020-07-21 01:14:44,733 INFO L226 Difference]: Without dead ends: 99 [2020-07-21 01:14:44,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:14:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-21 01:14:44,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-07-21 01:14:44,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 01:14:44,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-07-21 01:14:44,814 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 8 [2020-07-21 01:14:44,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:14:44,814 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-07-21 01:14:44,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:14:44,815 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-07-21 01:14:44,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 01:14:44,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:44,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:45,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:45,031 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:45,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:45,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1461031906, now seen corresponding path program 1 times [2020-07-21 01:14:45,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:45,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215427408] [2020-07-21 01:14:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:45,150 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:14:45,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:45,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 01:14:45,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:45,231 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 13 treesize of output 9 [2020-07-21 01:14:45,232 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:45,239 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:45,243 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 13 treesize of output 9 [2020-07-21 01:14:45,243 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:45,259 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:45,259 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:14:45,260 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-21 01:14:45,280 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:14:45,281 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:14:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:14:45,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:45,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215427408] [2020-07-21 01:14:45,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:45,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:14:45,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319052004] [2020-07-21 01:14:45,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:14:45,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:45,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:14:45,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:14:45,298 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 4 states. [2020-07-21 01:14:45,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:14:45,414 INFO L93 Difference]: Finished difference Result 205 states and 227 transitions. [2020-07-21 01:14:45,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:14:45,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-21 01:14:45,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:14:45,416 INFO L225 Difference]: With dead ends: 205 [2020-07-21 01:14:45,417 INFO L226 Difference]: Without dead ends: 136 [2020-07-21 01:14:45,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:14:45,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-07-21 01:14:45,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 83. [2020-07-21 01:14:45,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-21 01:14:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2020-07-21 01:14:45,429 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 14 [2020-07-21 01:14:45,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:14:45,429 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2020-07-21 01:14:45,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:14:45,430 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2020-07-21 01:14:45,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 01:14:45,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:45,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:45,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:45,647 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:45,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:45,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1461033828, now seen corresponding path program 1 times [2020-07-21 01:14:45,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:45,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786698882] [2020-07-21 01:14:45,649 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:45,752 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:14:45,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:45,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 01:14:45,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:45,764 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 13 treesize of output 9 [2020-07-21 01:14:45,765 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:45,771 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:45,775 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 13 treesize of output 9 [2020-07-21 01:14:45,776 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:45,781 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:45,782 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:14:45,782 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-21 01:14:45,795 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:14:45,796 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:14:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:14:45,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:45,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786698882] [2020-07-21 01:14:45,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:45,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:14:45,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009086559] [2020-07-21 01:14:45,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:14:45,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:45,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:14:45,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:14:45,809 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 4 states. [2020-07-21 01:14:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:14:45,922 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2020-07-21 01:14:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:14:45,922 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-21 01:14:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:14:45,924 INFO L225 Difference]: With dead ends: 137 [2020-07-21 01:14:45,924 INFO L226 Difference]: Without dead ends: 135 [2020-07-21 01:14:45,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:14:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-21 01:14:45,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2020-07-21 01:14:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-21 01:14:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2020-07-21 01:14:45,933 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 14 [2020-07-21 01:14:45,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:14:45,934 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2020-07-21 01:14:45,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:14:45,936 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2020-07-21 01:14:45,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 01:14:45,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:45,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:46,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:46,139 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:46,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:46,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1462880870, now seen corresponding path program 1 times [2020-07-21 01:14:46,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:46,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606855963] [2020-07-21 01:14:46,142 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:46,271 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:14:46,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:46,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 01:14:46,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:46,280 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 01:14:46,281 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:46,283 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:46,283 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:14:46,283 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-21 01:14:46,322 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:46,322 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 01:14:46,323 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:46,343 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:46,345 INFO L440 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_37|], 8=[|v_#memory_$Pointer$.base_37|]} [2020-07-21 01:14:46,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:14:46,351 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:46,366 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:46,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:14:46,384 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-07-21 01:14:46,385 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2020-07-21 01:14:46,386 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:46,399 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:46,401 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 01:14:46,401 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:186, output treesize:49 [2020-07-21 01:14:46,423 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 01:14:46,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:14:46,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:46,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606855963] [2020-07-21 01:14:46,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:46,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:14:46,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23251622] [2020-07-21 01:14:46,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:14:46,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:46,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:14:46,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:14:46,435 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand 5 states. [2020-07-21 01:14:47,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:14:47,167 INFO L93 Difference]: Finished difference Result 220 states and 242 transitions. [2020-07-21 01:14:47,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:14:47,168 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 01:14:47,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:14:47,171 INFO L225 Difference]: With dead ends: 220 [2020-07-21 01:14:47,171 INFO L226 Difference]: Without dead ends: 151 [2020-07-21 01:14:47,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:14:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-21 01:14:47,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 81. [2020-07-21 01:14:47,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 01:14:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-07-21 01:14:47,193 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 14 [2020-07-21 01:14:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:14:47,194 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-07-21 01:14:47,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:14:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-07-21 01:14:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 01:14:47,195 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:47,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:47,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:47,408 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:47,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:47,408 INFO L82 PathProgramCache]: Analyzing trace with hash -631612141, now seen corresponding path program 1 times [2020-07-21 01:14:47,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:47,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316999352] [2020-07-21 01:14:47,409 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:47,501 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:14:47,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:47,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 01:14:47,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:47,511 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 01:14:47,512 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:47,513 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:47,514 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:14:47,514 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-07-21 01:14:47,550 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:47,551 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 01:14:47,551 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:47,561 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:47,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:14:47,575 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:47,581 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:47,582 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:14:47,582 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:48, output treesize:4 [2020-07-21 01:14:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:14:47,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:47,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316999352] [2020-07-21 01:14:47,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:47,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:14:47,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460880391] [2020-07-21 01:14:47,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:14:47,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:47,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:14:47,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:14:47,594 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 5 states. [2020-07-21 01:14:47,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:14:47,729 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2020-07-21 01:14:47,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:14:47,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-21 01:14:47,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:14:47,730 INFO L225 Difference]: With dead ends: 126 [2020-07-21 01:14:47,731 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 01:14:47,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:14:47,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 01:14:47,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-07-21 01:14:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 01:14:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-07-21 01:14:47,739 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 19 [2020-07-21 01:14:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:14:47,739 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-07-21 01:14:47,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:14:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-07-21 01:14:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 01:14:47,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:47,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:47,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:47,958 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:47,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1894864309, now seen corresponding path program 1 times [2020-07-21 01:14:47,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:47,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390355467] [2020-07-21 01:14:47,960 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:48,047 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:14:48,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:48,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 01:14:48,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:14:48,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:48,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390355467] [2020-07-21 01:14:48,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:48,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:14:48,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194695573] [2020-07-21 01:14:48,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:14:48,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:48,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:14:48,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:14:48,076 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 4 states. [2020-07-21 01:14:48,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:14:48,179 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2020-07-21 01:14:48,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:14:48,179 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-07-21 01:14:48,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:14:48,180 INFO L225 Difference]: With dead ends: 136 [2020-07-21 01:14:48,180 INFO L226 Difference]: Without dead ends: 116 [2020-07-21 01:14:48,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:14:48,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-21 01:14:48,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-07-21 01:14:48,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 01:14:48,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2020-07-21 01:14:48,187 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 20 [2020-07-21 01:14:48,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:14:48,187 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2020-07-21 01:14:48,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:14:48,187 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2020-07-21 01:14:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 01:14:48,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:48,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:48,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:48,399 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:48,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:48,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1337316768, now seen corresponding path program 1 times [2020-07-21 01:14:48,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:48,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291790209] [2020-07-21 01:14:48,401 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:48,486 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:14:48,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:48,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 01:14:48,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:14:48,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:48,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291790209] [2020-07-21 01:14:48,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:48,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:14:48,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803735332] [2020-07-21 01:14:48,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:14:48,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:48,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:14:48,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:14:48,512 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 3 states. [2020-07-21 01:14:48,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:14:48,523 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2020-07-21 01:14:48,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:14:48,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 01:14:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:14:48,525 INFO L225 Difference]: With dead ends: 102 [2020-07-21 01:14:48,525 INFO L226 Difference]: Without dead ends: 100 [2020-07-21 01:14:48,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:14:48,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-21 01:14:48,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 78. [2020-07-21 01:14:48,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-21 01:14:48,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2020-07-21 01:14:48,532 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 24 [2020-07-21 01:14:48,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:14:48,533 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2020-07-21 01:14:48,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:14:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2020-07-21 01:14:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 01:14:48,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:48,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:48,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:48,747 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:48,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:48,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1492857654, now seen corresponding path program 1 times [2020-07-21 01:14:48,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:48,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898666384] [2020-07-21 01:14:48,749 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:48,840 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:14:48,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:48,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:14:48,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:14:48,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:48,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898666384] [2020-07-21 01:14:48,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:48,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:14:48,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056206428] [2020-07-21 01:14:48,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:14:48,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:48,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:14:48,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:14:48,860 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand 3 states. [2020-07-21 01:14:48,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:14:48,872 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2020-07-21 01:14:48,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:14:48,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 01:14:48,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:14:48,874 INFO L225 Difference]: With dead ends: 78 [2020-07-21 01:14:48,875 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 01:14:48,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:14:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 01:14:48,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-07-21 01:14:48,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 01:14:48,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-07-21 01:14:48,882 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 25 [2020-07-21 01:14:48,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:14:48,882 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-07-21 01:14:48,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:14:48,883 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-07-21 01:14:48,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 01:14:48,884 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:48,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:49,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:49,087 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:49,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:49,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1632693981, now seen corresponding path program 1 times [2020-07-21 01:14:49,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:49,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557865316] [2020-07-21 01:14:49,089 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:49,205 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:14:49,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:49,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 01:14:49,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:49,225 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 13 treesize of output 9 [2020-07-21 01:14:49,226 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:49,232 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:49,235 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 13 treesize of output 9 [2020-07-21 01:14:49,236 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:49,241 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:49,242 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:14:49,242 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-07-21 01:14:49,253 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:14:49,254 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:14:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:14:49,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:49,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557865316] [2020-07-21 01:14:49,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:49,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:14:49,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294658405] [2020-07-21 01:14:49,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:14:49,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:49,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:14:49,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:14:49,272 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 4 states. [2020-07-21 01:14:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:14:49,367 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2020-07-21 01:14:49,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:14:49,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-21 01:14:49,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:14:49,369 INFO L225 Difference]: With dead ends: 86 [2020-07-21 01:14:49,370 INFO L226 Difference]: Without dead ends: 84 [2020-07-21 01:14:49,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:14:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-21 01:14:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2020-07-21 01:14:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 01:14:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-07-21 01:14:49,376 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 27 [2020-07-21 01:14:49,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:14:49,376 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-07-21 01:14:49,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:14:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-07-21 01:14:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 01:14:49,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:49,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:49,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:49,593 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:49,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:49,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1630846939, now seen corresponding path program 1 times [2020-07-21 01:14:49,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:49,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051563550] [2020-07-21 01:14:49,595 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:49,734 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:14:49,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:49,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 01:14:49,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:49,777 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:14:49,782 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:14:49,783 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:14:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:14:49,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:49,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051563550] [2020-07-21 01:14:49,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:49,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:14:49,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60272493] [2020-07-21 01:14:49,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:14:49,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:49,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:14:49,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:14:49,796 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 4 states. [2020-07-21 01:14:49,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:14:49,906 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2020-07-21 01:14:49,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:14:49,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-07-21 01:14:49,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:14:49,908 INFO L225 Difference]: With dead ends: 80 [2020-07-21 01:14:49,908 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 01:14:49,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:14:49,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 01:14:49,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2020-07-21 01:14:49,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-21 01:14:49,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-07-21 01:14:49,917 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 27 [2020-07-21 01:14:49,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:14:49,917 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-07-21 01:14:49,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:14:49,917 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-07-21 01:14:49,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 01:14:49,918 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:49,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:50,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:50,121 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:50,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:50,122 INFO L82 PathProgramCache]: Analyzing trace with hash 668074133, now seen corresponding path program 1 times [2020-07-21 01:14:50,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:50,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190377606] [2020-07-21 01:14:50,125 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:50,218 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:14:50,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:50,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 01:14:50,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:50,240 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 13 treesize of output 9 [2020-07-21 01:14:50,240 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:50,247 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:50,251 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 13 treesize of output 9 [2020-07-21 01:14:50,252 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:50,269 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:50,269 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:14:50,270 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2020-07-21 01:14:50,297 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 15 treesize of output 7 [2020-07-21 01:14:50,298 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:50,303 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:50,306 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 15 treesize of output 7 [2020-07-21 01:14:50,306 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:50,310 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:50,310 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:14:50,311 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-07-21 01:14:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:14:50,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:50,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190377606] [2020-07-21 01:14:50,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:50,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 01:14:50,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010216103] [2020-07-21 01:14:50,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:14:50,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:50,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:14:50,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:14:50,324 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 6 states. [2020-07-21 01:14:50,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:14:50,578 INFO L93 Difference]: Finished difference Result 200 states and 225 transitions. [2020-07-21 01:14:50,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 01:14:50,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-21 01:14:50,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:14:50,580 INFO L225 Difference]: With dead ends: 200 [2020-07-21 01:14:50,580 INFO L226 Difference]: Without dead ends: 159 [2020-07-21 01:14:50,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-07-21 01:14:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-07-21 01:14:50,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 96. [2020-07-21 01:14:50,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-21 01:14:50,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2020-07-21 01:14:50,588 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 28 [2020-07-21 01:14:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:14:50,589 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2020-07-21 01:14:50,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:14:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2020-07-21 01:14:50,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 01:14:50,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:50,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:50,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:50,804 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:50,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:50,805 INFO L82 PathProgramCache]: Analyzing trace with hash 567478293, now seen corresponding path program 1 times [2020-07-21 01:14:50,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:50,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614919557] [2020-07-21 01:14:50,806 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:50,915 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:14:50,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:50,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 01:14:50,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:50,935 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 01:14:50,936 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:50,940 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:50,940 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:14:50,940 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-07-21 01:14:50,967 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:50,968 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-07-21 01:14:50,969 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:14:50,969 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:50,999 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:51,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:14:51,011 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 01:14:51,024 INFO L350 Elim1Store]: treesize reduction 87, result has 9.4 percent of original size [2020-07-21 01:14:51,025 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 193 [2020-07-21 01:14:51,025 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:51,045 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:51,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:14:51,054 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 31 [2020-07-21 01:14:51,054 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:51,078 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:51,080 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:14:51,080 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:356, output treesize:75 [2020-07-21 01:14:51,175 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 01:14:51,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 01:14:51,191 INFO L350 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2020-07-21 01:14:51,192 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 55 [2020-07-21 01:14:51,194 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:14:51,196 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 01:14:51,198 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 01:14:51,224 INFO L624 ElimStorePlain]: treesize reduction 8, result has 84.0 percent of original size [2020-07-21 01:14:51,266 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:51,267 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 34 [2020-07-21 01:14:51,268 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 01:14:51,273 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:14:51,274 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:14:51,275 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:94, output treesize:7 [2020-07-21 01:14:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:14:51,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:51,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614919557] [2020-07-21 01:14:51,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:51,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 01:14:51,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889777694] [2020-07-21 01:14:51,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:14:51,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:51,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:14:51,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:14:51,318 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand 7 states. [2020-07-21 01:14:51,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:14:51,998 INFO L93 Difference]: Finished difference Result 238 states and 265 transitions. [2020-07-21 01:14:51,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 01:14:51,998 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-21 01:14:51,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:14:52,000 INFO L225 Difference]: With dead ends: 238 [2020-07-21 01:14:52,000 INFO L226 Difference]: Without dead ends: 236 [2020-07-21 01:14:52,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-21 01:14:52,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-07-21 01:14:52,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 108. [2020-07-21 01:14:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 01:14:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2020-07-21 01:14:52,011 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 28 [2020-07-21 01:14:52,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:14:52,012 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2020-07-21 01:14:52,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:14:52,012 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2020-07-21 01:14:52,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 01:14:52,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:52,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:52,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:52,222 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:52,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:52,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1429819819, now seen corresponding path program 1 times [2020-07-21 01:14:52,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:52,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647778492] [2020-07-21 01:14:52,223 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:52,318 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:14:52,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:14:52,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:14:52,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:14:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 01:14:52,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:14:52,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647778492] [2020-07-21 01:14:52,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:14:52,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:14:52,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987567757] [2020-07-21 01:14:52,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:14:52,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:14:52,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:14:52,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:14:52,343 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 3 states. [2020-07-21 01:14:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:14:52,388 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2020-07-21 01:14:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:14:52,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-07-21 01:14:52,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:14:52,390 INFO L225 Difference]: With dead ends: 109 [2020-07-21 01:14:52,390 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 01:14:52,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:14:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 01:14:52,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-07-21 01:14:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-21 01:14:52,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2020-07-21 01:14:52,398 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 30 [2020-07-21 01:14:52,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:14:52,399 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2020-07-21 01:14:52,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:14:52,399 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2020-07-21 01:14:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 01:14:52,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:14:52,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:14:52,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:52,618 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr12ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:14:52,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:14:52,618 INFO L82 PathProgramCache]: Analyzing trace with hash 758661948, now seen corresponding path program 1 times [2020-07-21 01:14:52,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:14:52,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188289312] [2020-07-21 01:14:52,619 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:52,722 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:14:52,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:14:52,723 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:14:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:14:52,739 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:14:52,762 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:14:52,763 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:14:52,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:14:53,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:14:53 BoogieIcfgContainer [2020-07-21 01:14:53,012 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:14:53,014 INFO L168 Benchmark]: Toolchain (without parser) took 10436.55 ms. Allocated memory was 142.6 MB in the beginning and 299.9 MB in the end (delta: 157.3 MB). Free memory was 98.9 MB in the beginning and 109.1 MB in the end (delta: -10.2 MB). Peak memory consumption was 147.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:14:53,014 INFO L168 Benchmark]: CDTParser took 1.76 ms. Allocated memory is still 142.6 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 01:14:53,015 INFO L168 Benchmark]: CACSL2BoogieTranslator took 641.91 ms. Allocated memory was 142.6 MB in the beginning and 200.3 MB in the end (delta: 57.7 MB). Free memory was 98.5 MB in the beginning and 168.1 MB in the end (delta: -69.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:14:53,015 INFO L168 Benchmark]: Boogie Preprocessor took 89.67 ms. Allocated memory is still 200.3 MB. Free memory was 168.1 MB in the beginning and 164.5 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:14:53,016 INFO L168 Benchmark]: RCFGBuilder took 856.75 ms. Allocated memory is still 200.3 MB. Free memory was 164.5 MB in the beginning and 107.9 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:14:53,016 INFO L168 Benchmark]: TraceAbstraction took 8840.58 ms. Allocated memory was 200.3 MB in the beginning and 299.9 MB in the end (delta: 99.6 MB). Free memory was 107.9 MB in the beginning and 109.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 98.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:14:53,018 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.76 ms. Allocated memory is still 142.6 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 641.91 ms. Allocated memory was 142.6 MB in the beginning and 200.3 MB in the end (delta: 57.7 MB). Free memory was 98.5 MB in the beginning and 168.1 MB in the end (delta: -69.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 89.67 ms. Allocated memory is still 200.3 MB. Free memory was 168.1 MB in the beginning and 164.5 MB in the end (delta: 3.6 MB). Peak memory consumption was 3.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 856.75 ms. Allocated memory is still 200.3 MB. Free memory was 164.5 MB in the beginning and 107.9 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8840.58 ms. Allocated memory was 200.3 MB in the beginning and 299.9 MB in the end (delta: 99.6 MB). Free memory was 107.9 MB in the beginning and 109.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 98.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1029]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* list = malloc(sizeof(SLL)); [L993] list->next = ((void*)0) [L994] list->prev = ((void*)0) VAL [list={-2:0}, malloc(sizeof(SLL))={-2:0}] [L995] COND FALSE !(!(list != ((void*)0))) VAL [list={-2:0}, malloc(sizeof(SLL))={-2:0}] [L995] COND FALSE !(__VERIFIER_nondet_int()) [L995] list->inner = malloc(sizeof(SLL)) [L995] EXPR list->inner [L995] list->inner->next = ((void*)0) [L995] EXPR list->inner [L995] list->inner->inner = ((void*)0) [L995] EXPR list->inner [L995] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) VAL [list={-2:0}, list->inner={-1:0}, list->inner != ((void*)0) || list->inner == ((void*)0)=1, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L995] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L997] SLL* end = list; VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1011] end = ((void*)0) [L1012] end = list VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1015] COND FALSE !(!(((void*)0) != end)) VAL [end={-2:0}, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1017] COND TRUE ((void*)0) != end [L1019] int len = 0; [L1020] EXPR end->inner [L1020] SLL* inner = end->inner; [L1021] COND TRUE ((void*)0) != inner VAL [end={-2:0}, inner={-1:0}, len=0, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1023] COND TRUE len == 0 [L1024] len = 1 VAL [end={-2:0}, inner={-1:0}, len=1, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1027] COND FALSE !(!(((void*)0) != inner)) VAL [end={-2:0}, inner={-1:0}, len=1, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1028] EXPR inner->inner VAL [end={-2:0}, inner={-1:0}, inner->inner={0:0}, len=1, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1028] COND FALSE !(!(((void*)0) == inner->inner)) [L1029] EXPR inner->next VAL [end={-2:0}, inner={-1:0}, inner->next={0:0}, len=1, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1029] COND TRUE !(((void*)0) != inner->next) [L1029] __VERIFIER_error() VAL [end={-2:0}, inner={-1:0}, len=1, list={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 88 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.7s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1018 SDtfs, 1172 SDslu, 1633 SDs, 0 SdLazy, 733 SolverSat, 67 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 284 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 500 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 309 NumberOfCodeBlocks, 305 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 265 ConstructedInterpolants, 6 QuantifiedInterpolants, 51575 SizeOfPredicates, 76 NumberOfNonLiveVariables, 1131 ConjunctsInSsa, 133 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 1/1 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...