/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:20:01,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:20:01,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:20:01,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:20:01,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:20:01,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:20:01,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:20:01,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:20:01,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:20:01,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:20:01,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:20:01,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:20:01,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:20:01,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:20:01,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:20:01,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:20:01,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:20:01,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:20:01,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:20:01,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:20:01,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:20:01,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:20:01,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:20:01,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:20:01,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 14:20:01,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 14:20:01,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 14:20:01,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 14:20:01,272 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 14:20:01,273 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-20 14:20:01,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:20:01,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:20:01,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:20:01,280 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 14:20:01,302 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:20:01,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:20:01,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:20:01,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:20:01,307 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:20:01,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:20:01,307 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:20:01,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:20:01,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:20:01,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:20:01,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:20:01,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:20:01,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:20:01,310 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:20:01,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:20:01,310 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:20:01,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:20:01,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:20:01,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:20:01,311 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:20:01,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:20:01,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:20:01,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:20:01,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:20:01,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:20:01,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:20:01,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:01,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:20:01,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:20:01,314 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 14:20:01,593 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:20:01,608 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:20:01,611 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:20:01,613 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:20:01,613 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:20:01,614 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-20 14:20:01,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3adeda15e/3f9c73eecfcb4e62bbf0ba60f4fbcb97/FLAG0a1908be2 [2020-07-20 14:20:02,167 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:20:02,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-20 14:20:02,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3adeda15e/3f9c73eecfcb4e62bbf0ba60f4fbcb97/FLAG0a1908be2 [2020-07-20 14:20:02,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3adeda15e/3f9c73eecfcb4e62bbf0ba60f4fbcb97 [2020-07-20 14:20:02,501 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:20:02,504 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:20:02,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:20:02,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:20:02,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:20:02,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:20:02" (1/1) ... [2020-07-20 14:20:02,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f318360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:20:02, skipping insertion in model container [2020-07-20 14:20:02,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:20:02" (1/1) ... [2020-07-20 14:20:02,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:20:02,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:20:02,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:20:02,788 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:20:02,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:20:02,929 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:20:02,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:20:02 WrapperNode [2020-07-20 14:20:02,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:20:02,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:20:02,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:20:02,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:20:02,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:20:02" (1/1) ... [2020-07-20 14:20:02,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:20:02" (1/1) ... [2020-07-20 14:20:02,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:20:02" (1/1) ... [2020-07-20 14:20:02,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:20:02" (1/1) ... [2020-07-20 14:20:02,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:20:02" (1/1) ... [2020-07-20 14:20:02,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:20:02" (1/1) ... [2020-07-20 14:20:02,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:20:02" (1/1) ... [2020-07-20 14:20:03,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:20:03,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:20:03,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:20:03,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:20:03,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:20:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:20:03,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:20:03,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:20:03,066 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:20:03,066 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-07-20 14:20:03,066 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-07-20 14:20:03,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:20:03,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:20:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:20:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-07-20 14:20:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-07-20 14:20:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-07-20 14:20:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-07-20 14:20:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-07-20 14:20:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-07-20 14:20:03,068 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-07-20 14:20:03,068 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-07-20 14:20:03,068 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-07-20 14:20:03,068 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-07-20 14:20:03,068 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-07-20 14:20:03,068 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-07-20 14:20:03,069 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-07-20 14:20:03,069 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-07-20 14:20:03,069 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-07-20 14:20:03,069 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-07-20 14:20:03,069 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-07-20 14:20:03,069 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-07-20 14:20:03,069 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-07-20 14:20:03,070 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-07-20 14:20:03,070 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-07-20 14:20:03,070 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-07-20 14:20:03,070 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-07-20 14:20:03,070 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-07-20 14:20:03,070 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-07-20 14:20:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-07-20 14:20:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 14:20:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 14:20:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 14:20:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 14:20:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:20:03,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:20:03,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:20:03,512 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:20:03,512 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 14:20:03,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:20:03 BoogieIcfgContainer [2020-07-20 14:20:03,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:20:03,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:20:03,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:20:03,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:20:03,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:20:02" (1/3) ... [2020-07-20 14:20:03,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149176e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:20:03, skipping insertion in model container [2020-07-20 14:20:03,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:20:02" (2/3) ... [2020-07-20 14:20:03,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149176e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:20:03, skipping insertion in model container [2020-07-20 14:20:03,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:20:03" (3/3) ... [2020-07-20 14:20:03,529 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-20 14:20:03,540 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:20:03,548 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:20:03,563 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:20:03,585 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:20:03,586 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:20:03,586 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:20:03,586 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:20:03,586 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:20:03,586 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:20:03,587 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:20:03,587 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:20:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-07-20 14:20:03,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 14:20:03,616 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:20:03,617 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] [2020-07-20 14:20:03,618 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:20:03,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:20:03,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2018987797, now seen corresponding path program 1 times [2020-07-20 14:20:03,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:20:03,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781652377] [2020-07-20 14:20:03,636 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:03,785 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:20:03,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:20:03,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 14:20:03,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:20:03,873 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:20:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:03,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:20:03,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781652377] [2020-07-20 14:20:03,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:20:03,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 14:20:03,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605536420] [2020-07-20 14:20:03,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:20:03,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:20:03,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:20:03,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:20:03,921 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 6 states. [2020-07-20 14:20:04,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:20:04,165 INFO L93 Difference]: Finished difference Result 139 states and 195 transitions. [2020-07-20 14:20:04,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 14:20:04,167 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-07-20 14:20:04,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:20:04,180 INFO L225 Difference]: With dead ends: 139 [2020-07-20 14:20:04,180 INFO L226 Difference]: Without dead ends: 81 [2020-07-20 14:20:04,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-07-20 14:20:04,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-20 14:20:04,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-07-20 14:20:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 14:20:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2020-07-20 14:20:04,246 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 29 [2020-07-20 14:20:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:20:04,247 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2020-07-20 14:20:04,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:20:04,247 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2020-07-20 14:20:04,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 14:20:04,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:20:04,249 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, 1, 1] [2020-07-20 14:20:04,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:04,464 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:20:04,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:20:04,465 INFO L82 PathProgramCache]: Analyzing trace with hash 787449890, now seen corresponding path program 1 times [2020-07-20 14:20:04,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:20:04,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515564289] [2020-07-20 14:20:04,466 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:04,592 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:20:04,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:20:04,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 14:20:04,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:20:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:04,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:20:04,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515564289] [2020-07-20 14:20:04,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:20:04,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:20:04,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928095030] [2020-07-20 14:20:04,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:20:04,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:20:04,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:20:04,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:20:04,634 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand 3 states. [2020-07-20 14:20:04,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:20:04,659 INFO L93 Difference]: Finished difference Result 106 states and 137 transitions. [2020-07-20 14:20:04,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:20:04,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-20 14:20:04,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:20:04,662 INFO L225 Difference]: With dead ends: 106 [2020-07-20 14:20:04,662 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 14:20:04,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:20:04,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 14:20:04,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-20 14:20:04,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 14:20:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2020-07-20 14:20:04,674 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 33 [2020-07-20 14:20:04,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:20:04,674 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2020-07-20 14:20:04,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:20:04,674 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2020-07-20 14:20:04,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 14:20:04,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:20:04,676 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, 1, 1] [2020-07-20 14:20:04,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:04,890 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:20:04,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:20:04,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1210151716, now seen corresponding path program 1 times [2020-07-20 14:20:04,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:20:04,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102714941] [2020-07-20 14:20:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:04,980 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:20:04,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:20:04,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 14:20:04,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:20:05,021 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:20:05,052 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:20:05,120 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 [2020-07-20 14:20:05,121 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 14:20:05,125 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 14:20:05,126 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 14:20:05,126 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-07-20 14:20:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:05,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:20:05,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102714941] [2020-07-20 14:20:05,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:20:05,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 14:20:05,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353752857] [2020-07-20 14:20:05,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:20:05,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:20:05,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:20:05,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:20:05,145 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 6 states. [2020-07-20 14:20:05,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:20:05,262 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2020-07-20 14:20:05,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:20:05,263 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-07-20 14:20:05,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:20:05,265 INFO L225 Difference]: With dead ends: 127 [2020-07-20 14:20:05,266 INFO L226 Difference]: Without dead ends: 83 [2020-07-20 14:20:05,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:20:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-20 14:20:05,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2020-07-20 14:20:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 14:20:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-07-20 14:20:05,278 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 33 [2020-07-20 14:20:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:20:05,278 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-07-20 14:20:05,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:20:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-07-20 14:20:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 14:20:05,280 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:20:05,280 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, 1, 1] [2020-07-20 14:20:05,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:05,496 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:20:05,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:20:05,497 INFO L82 PathProgramCache]: Analyzing trace with hash -783992990, now seen corresponding path program 1 times [2020-07-20 14:20:05,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:20:05,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662384283] [2020-07-20 14:20:05,498 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:05,575 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:20:05,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:20:05,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 14:20:05,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:20:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:05,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:20:05,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662384283] [2020-07-20 14:20:05,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:20:05,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 14:20:05,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859988813] [2020-07-20 14:20:05,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 14:20:05,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:20:05,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 14:20:05,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:20:05,617 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 5 states. [2020-07-20 14:20:05,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:20:05,744 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2020-07-20 14:20:05,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 14:20:05,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-20 14:20:05,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:20:05,746 INFO L225 Difference]: With dead ends: 120 [2020-07-20 14:20:05,746 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 14:20:05,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:20:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 14:20:05,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 47. [2020-07-20 14:20:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 14:20:05,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-07-20 14:20:05,754 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 33 [2020-07-20 14:20:05,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:20:05,754 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-07-20 14:20:05,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 14:20:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-07-20 14:20:05,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 14:20:05,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:20:05,756 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:20:05,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:05,958 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:20:05,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:20:05,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1691065521, now seen corresponding path program 1 times [2020-07-20 14:20:05,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:20:05,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541697600] [2020-07-20 14:20:05,960 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 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 [2020-07-20 14:20:06,047 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:20:06,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:20:06,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 14:20:06,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:20:06,089 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:20:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:06,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:20:06,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:20:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:06,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541697600] [2020-07-20 14:20:06,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:20:06,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-20 14:20:06,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350212925] [2020-07-20 14:20:06,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 14:20:06,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:20:06,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 14:20:06,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:20:06,162 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 7 states. [2020-07-20 14:20:06,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:20:06,289 INFO L93 Difference]: Finished difference Result 125 states and 157 transitions. [2020-07-20 14:20:06,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 14:20:06,297 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-20 14:20:06,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:20:06,298 INFO L225 Difference]: With dead ends: 125 [2020-07-20 14:20:06,298 INFO L226 Difference]: Without dead ends: 89 [2020-07-20 14:20:06,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-20 14:20:06,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-20 14:20:06,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-07-20 14:20:06,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 14:20:06,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-07-20 14:20:06,312 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 38 [2020-07-20 14:20:06,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:20:06,312 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-07-20 14:20:06,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 14:20:06,313 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-07-20 14:20:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 14:20:06,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:20:06,319 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:20:06,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:06,521 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:20:06,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:20:06,522 INFO L82 PathProgramCache]: Analyzing trace with hash -731835505, now seen corresponding path program 1 times [2020-07-20 14:20:06,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:20:06,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574720396] [2020-07-20 14:20:06,523 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 [2020-07-20 14:20:06,591 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:20:06,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:20:06,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 14:20:06,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:20:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:06,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:20:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:06,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574720396] [2020-07-20 14:20:06,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:20:06,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-07-20 14:20:06,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755756996] [2020-07-20 14:20:06,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 14:20:06,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:20:06,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 14:20:06,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 14:20:06,712 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 11 states. [2020-07-20 14:20:07,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:20:07,132 INFO L93 Difference]: Finished difference Result 227 states and 298 transitions. [2020-07-20 14:20:07,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 14:20:07,133 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-07-20 14:20:07,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:20:07,135 INFO L225 Difference]: With dead ends: 227 [2020-07-20 14:20:07,135 INFO L226 Difference]: Without dead ends: 123 [2020-07-20 14:20:07,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-07-20 14:20:07,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-20 14:20:07,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 80. [2020-07-20 14:20:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 14:20:07,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2020-07-20 14:20:07,146 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 38 [2020-07-20 14:20:07,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:20:07,147 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2020-07-20 14:20:07,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 14:20:07,147 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2020-07-20 14:20:07,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 14:20:07,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:20:07,148 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:20:07,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:07,355 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:20:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:20:07,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1568987085, now seen corresponding path program 1 times [2020-07-20 14:20:07,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:20:07,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859677632] [2020-07-20 14:20:07,357 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 [2020-07-20 14:20:07,447 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:20:07,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:20:07,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 14:20:07,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:20:07,504 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:20:07,506 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:20:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:07,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:20:07,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:20:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:07,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859677632] [2020-07-20 14:20:07,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:20:07,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-20 14:20:07,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358166852] [2020-07-20 14:20:07,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 14:20:07,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:20:07,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 14:20:07,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:20:07,631 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand 12 states. [2020-07-20 14:20:07,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:20:07,921 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2020-07-20 14:20:07,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 14:20:07,923 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-07-20 14:20:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:20:07,925 INFO L225 Difference]: With dead ends: 129 [2020-07-20 14:20:07,925 INFO L226 Difference]: Without dead ends: 127 [2020-07-20 14:20:07,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-07-20 14:20:07,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-20 14:20:07,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 98. [2020-07-20 14:20:07,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-20 14:20:07,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2020-07-20 14:20:07,937 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 38 [2020-07-20 14:20:07,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:20:07,937 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2020-07-20 14:20:07,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 14:20:07,938 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2020-07-20 14:20:07,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 14:20:07,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:20:07,940 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:20:08,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:08,144 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:20:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:20:08,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1672524348, now seen corresponding path program 2 times [2020-07-20 14:20:08,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:20:08,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564653483] [2020-07-20 14:20:08,146 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 [2020-07-20 14:20:08,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:20:08,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:20:08,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 14:20:08,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:20:08,260 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:20:08,270 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:20:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 14:20:08,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:20:08,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564653483] [2020-07-20 14:20:08,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:20:08,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 14:20:08,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165639443] [2020-07-20 14:20:08,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 14:20:08,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:20:08,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 14:20:08,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:20:08,292 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand 5 states. [2020-07-20 14:20:08,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:20:08,370 INFO L93 Difference]: Finished difference Result 223 states and 276 transitions. [2020-07-20 14:20:08,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 14:20:08,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-07-20 14:20:08,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:20:08,374 INFO L225 Difference]: With dead ends: 223 [2020-07-20 14:20:08,374 INFO L226 Difference]: Without dead ends: 147 [2020-07-20 14:20:08,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:20:08,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-20 14:20:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 102. [2020-07-20 14:20:08,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-20 14:20:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 122 transitions. [2020-07-20 14:20:08,385 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 122 transitions. Word has length 43 [2020-07-20 14:20:08,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:20:08,385 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 122 transitions. [2020-07-20 14:20:08,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 14:20:08,386 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 122 transitions. [2020-07-20 14:20:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 14:20:08,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:20:08,387 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:20:08,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:08,601 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:20:08,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:20:08,602 INFO L82 PathProgramCache]: Analyzing trace with hash -713294332, now seen corresponding path program 2 times [2020-07-20 14:20:08,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:20:08,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418515842] [2020-07-20 14:20:08,603 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 [2020-07-20 14:20:08,674 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:20:08,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:20:08,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 14:20:08,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:20:08,710 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:20:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:08,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:20:08,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418515842] [2020-07-20 14:20:08,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:20:08,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 14:20:08,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344612144] [2020-07-20 14:20:08,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 14:20:08,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:20:08,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 14:20:08,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 14:20:08,725 INFO L87 Difference]: Start difference. First operand 102 states and 122 transitions. Second operand 8 states. [2020-07-20 14:20:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:20:08,873 INFO L93 Difference]: Finished difference Result 251 states and 308 transitions. [2020-07-20 14:20:08,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 14:20:08,874 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-07-20 14:20:08,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:20:08,875 INFO L225 Difference]: With dead ends: 251 [2020-07-20 14:20:08,876 INFO L226 Difference]: Without dead ends: 176 [2020-07-20 14:20:08,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:20:08,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-07-20 14:20:08,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 106. [2020-07-20 14:20:08,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 14:20:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2020-07-20 14:20:08,887 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 43 [2020-07-20 14:20:08,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:20:08,888 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2020-07-20 14:20:08,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 14:20:08,888 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2020-07-20 14:20:08,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 14:20:08,889 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:20:08,890 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:20:09,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:09,103 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:20:09,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:20:09,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1746971937, now seen corresponding path program 1 times [2020-07-20 14:20:09,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:20:09,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302222985] [2020-07-20 14:20:09,105 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 [2020-07-20 14:20:09,180 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:20:09,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:20:09,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:20:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:20:09,195 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:20:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 14:20:09,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:20:09,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302222985] [2020-07-20 14:20:09,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:20:09,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 14:20:09,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766957903] [2020-07-20 14:20:09,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 14:20:09,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:20:09,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 14:20:09,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:20:09,204 INFO L87 Difference]: Start difference. First operand 106 states and 126 transitions. Second operand 4 states. [2020-07-20 14:20:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:20:09,230 INFO L93 Difference]: Finished difference Result 191 states and 230 transitions. [2020-07-20 14:20:09,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 14:20:09,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-07-20 14:20:09,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:20:09,235 INFO L225 Difference]: With dead ends: 191 [2020-07-20 14:20:09,235 INFO L226 Difference]: Without dead ends: 112 [2020-07-20 14:20:09,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:20:09,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-20 14:20:09,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-07-20 14:20:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-20 14:20:09,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2020-07-20 14:20:09,244 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 45 [2020-07-20 14:20:09,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:20:09,244 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2020-07-20 14:20:09,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 14:20:09,245 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2020-07-20 14:20:09,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 14:20:09,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:20:09,246 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:20:09,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:09,461 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:20:09,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:20:09,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1526927005, now seen corresponding path program 1 times [2020-07-20 14:20:09,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:20:09,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968545515] [2020-07-20 14:20:09,463 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 [2020-07-20 14:20:09,535 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:20:09,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:20:09,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 14:20:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:20:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:09,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:20:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:09,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968545515] [2020-07-20 14:20:09,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:20:09,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-07-20 14:20:09,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467196349] [2020-07-20 14:20:09,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 14:20:09,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:20:09,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 14:20:09,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-07-20 14:20:09,719 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand 15 states. [2020-07-20 14:20:10,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:20:10,590 INFO L93 Difference]: Finished difference Result 509 states and 648 transitions. [2020-07-20 14:20:10,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 14:20:10,591 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-07-20 14:20:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:20:10,594 INFO L225 Difference]: With dead ends: 509 [2020-07-20 14:20:10,594 INFO L226 Difference]: Without dead ends: 243 [2020-07-20 14:20:10,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 14:20:10,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-20 14:20:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 128. [2020-07-20 14:20:10,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-20 14:20:10,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 147 transitions. [2020-07-20 14:20:10,611 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 147 transitions. Word has length 45 [2020-07-20 14:20:10,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:20:10,611 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 147 transitions. [2020-07-20 14:20:10,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 14:20:10,612 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 147 transitions. [2020-07-20 14:20:10,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 14:20:10,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:20:10,615 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:20:10,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:10,816 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:20:10,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:20:10,817 INFO L82 PathProgramCache]: Analyzing trace with hash -2066975713, now seen corresponding path program 1 times [2020-07-20 14:20:10,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:20:10,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124291612] [2020-07-20 14:20:10,818 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 [2020-07-20 14:20:10,886 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:20:10,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:20:10,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 14:20:10,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:20:10,988 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:20:10,989 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:20:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:11,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:20:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:11,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124291612] [2020-07-20 14:20:11,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:20:11,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2020-07-20 14:20:11,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212791427] [2020-07-20 14:20:11,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 14:20:11,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:20:11,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 14:20:11,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-07-20 14:20:11,166 INFO L87 Difference]: Start difference. First operand 128 states and 147 transitions. Second operand 19 states. [2020-07-20 14:20:11,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:20:11,840 INFO L93 Difference]: Finished difference Result 245 states and 292 transitions. [2020-07-20 14:20:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 14:20:11,841 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-07-20 14:20:11,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:20:11,843 INFO L225 Difference]: With dead ends: 245 [2020-07-20 14:20:11,843 INFO L226 Difference]: Without dead ends: 243 [2020-07-20 14:20:11,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2020-07-20 14:20:11,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-20 14:20:11,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 115. [2020-07-20 14:20:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-07-20 14:20:11,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2020-07-20 14:20:11,855 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 45 [2020-07-20 14:20:11,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:20:11,855 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2020-07-20 14:20:11,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 14:20:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2020-07-20 14:20:11,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 14:20:11,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:20:11,856 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:20:12,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:12,070 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:20:12,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:20:12,071 INFO L82 PathProgramCache]: Analyzing trace with hash 709278555, now seen corresponding path program 1 times [2020-07-20 14:20:12,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:20:12,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196627664] [2020-07-20 14:20:12,072 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 [2020-07-20 14:20:12,143 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:20:12,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:20:12,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 14:20:12,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:20:12,223 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:20:12,225 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:20:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:12,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:20:12,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:20:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:20:12,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196627664] [2020-07-20 14:20:12,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:20:12,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-07-20 14:20:12,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020418346] [2020-07-20 14:20:12,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 14:20:12,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:20:12,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 14:20:12,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-07-20 14:20:12,358 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand 16 states. [2020-07-20 14:20:12,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:20:12,922 INFO L93 Difference]: Finished difference Result 257 states and 313 transitions. [2020-07-20 14:20:12,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 14:20:12,923 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-07-20 14:20:12,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:20:12,926 INFO L225 Difference]: With dead ends: 257 [2020-07-20 14:20:12,927 INFO L226 Difference]: Without dead ends: 255 [2020-07-20 14:20:12,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2020-07-20 14:20:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-20 14:20:12,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 134. [2020-07-20 14:20:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 14:20:12,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 161 transitions. [2020-07-20 14:20:12,938 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 161 transitions. Word has length 45 [2020-07-20 14:20:12,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:20:12,939 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 161 transitions. [2020-07-20 14:20:12,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 14:20:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 161 transitions. [2020-07-20 14:20:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 14:20:12,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:20:12,940 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:20:13,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:13,149 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:20:13,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:20:13,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1410343133, now seen corresponding path program 1 times [2020-07-20 14:20:13,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:20:13,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513424245] [2020-07-20 14:20:13,151 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 [2020-07-20 14:20:13,220 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:20:13,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 14:20:13,221 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:20:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 14:20:13,242 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 14:20:13,315 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 14:20:13,315 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 14:20:13,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:20:13,549 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 14:20:13,551 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 14:20:13,554 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 14:20:13,554 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 14:20:13,555 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 14:20:13,555 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 14:20:13,557 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 14:20:13,558 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 14:20:13,560 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 14:20:13,560 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 14:20:13,561 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-20 14:20:13,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:20:13 BoogieIcfgContainer [2020-07-20 14:20:13,575 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 14:20:13,577 INFO L168 Benchmark]: Toolchain (without parser) took 11074.13 ms. Allocated memory was 139.5 MB in the beginning and 292.0 MB in the end (delta: 152.6 MB). Free memory was 104.1 MB in the beginning and 180.5 MB in the end (delta: -76.5 MB). Peak memory consumption was 76.1 MB. Max. memory is 7.1 GB. [2020-07-20 14:20:13,578 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 14:20:13,579 INFO L168 Benchmark]: CACSL2BoogieTranslator took 424.85 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 103.6 MB in the beginning and 180.9 MB in the end (delta: -77.3 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-07-20 14:20:13,579 INFO L168 Benchmark]: Boogie Preprocessor took 72.58 ms. Allocated memory is still 204.5 MB. Free memory was 180.9 MB in the beginning and 178.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-20 14:20:13,580 INFO L168 Benchmark]: RCFGBuilder took 513.48 ms. Allocated memory is still 204.5 MB. Free memory was 178.6 MB in the beginning and 151.3 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2020-07-20 14:20:13,581 INFO L168 Benchmark]: TraceAbstraction took 10056.79 ms. Allocated memory was 204.5 MB in the beginning and 292.0 MB in the end (delta: 87.6 MB). Free memory was 150.7 MB in the beginning and 180.5 MB in the end (delta: -29.9 MB). Peak memory consumption was 57.7 MB. Max. memory is 7.1 GB. [2020-07-20 14:20:13,584 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 424.85 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 103.6 MB in the beginning and 180.9 MB in the end (delta: -77.3 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 72.58 ms. Allocated memory is still 204.5 MB. Free memory was 180.9 MB in the beginning and 178.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 513.48 ms. Allocated memory is still 204.5 MB. Free memory was 178.6 MB in the beginning and 151.3 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10056.79 ms. Allocated memory was 204.5 MB in the beginning and 292.0 MB in the end (delta: 87.6 MB). Free memory was 150.7 MB in the beginning and 180.5 MB in the end (delta: -29.9 MB). Peak memory consumption was 57.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L74] char A [2 + 2 + 4 +1]; [L75] A[2 + 2 + 4] = 0 VAL [A={3:0}] [L76] CALL parse_expression_list (A) VAL [str={3:0}] [L48] int start=0, i=-1, j=-1; [L49] char str2[2]; VAL [i=-1, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}] [L50] COND FALSE !(!str) VAL [i=-1, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}] [L52] i++ [L53] str[i] [L54] case 0: VAL [i=0, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=13] [L69] EXPR str[i] VAL [i=0, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=13] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: VAL [i=1, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=15] [L69] EXPR str[i] VAL [i=1, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=15] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: VAL [i=2, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0] [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') VAL [(str[start] == ' ') || (str[start] == '\t')=0, i=2, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0, str[start]=13, str[start]=13] [L55] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L56] EXPR str[start] VAL [i=2, j=-1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0, str[start]=13] [L56] COND FALSE !(str[start] == '"') [L57] j = i-1 VAL [i=2, j=1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0] [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0, str[j]=15, str[j]=15] [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=0, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0, str[j]=15, str[j]=15] [L58] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L59] (0 < j) && (str[j] == '"') [L59] EXPR str[j] [L59] (0 < j) && (str[j] == '"') VAL [(0 < j) && (str[j] == '"')=0, i=2, j=1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0, str[j]=15] [L59] COND FALSE !((0 < j) && (str[j] == '"')) [L60] COND TRUE start<=j VAL [i=2, j=1, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0] [L61] CALL r_strncpy(str2, str+start, j-start+1) VAL [\old(n)=2, dest={2:0}, src={3:0}] [L30] return strncpy(dest,src,n); [L61] RET r_strncpy(str2, str+start, j-start+1) VAL [i=2, j=1, r_strncpy(str2, str+start, j-start+1)={17:18}, start=0, str={3:0}, str={3:0}, str2={2:0}, str[i]=0] [L62] CALL __VERIFIER_assert(j - start + 1 < 2) VAL [\old(cond)=0] [L3] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.9s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 689 SDtfs, 1819 SDslu, 2905 SDs, 0 SdLazy, 2244 SolverSat, 424 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 817 GetRequests, 646 SyntacticMatches, 7 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=13, 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, 629 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 553 NumberOfCodeBlocks, 520 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 738 ConstructedInterpolants, 0 QuantifiedInterpolants, 98288 SizeOfPredicates, 36 NumberOfNonLiveVariables, 1850 ConjunctsInSsa, 97 ConjunctsInUnsatCore, 19 InterpolantComputations, 7 PerfectInterpolantSequences, 27/93 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...