/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_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:44:33,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:44:33,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:44:33,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:44:33,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:44:33,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:44:33,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:44:33,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:44:33,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:44:33,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:44:33,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:44:33,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:44:33,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:44:33,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:44:33,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:44:33,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:44:33,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:44:33,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:44:33,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:44:33,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:44:33,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:44:33,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:44:33,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:44:33,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:44:33,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:44:33,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:44:33,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:44:33,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:44:33,525 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 16:44:33,555 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:44:33,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:44:33,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:44:33,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:44:33,558 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:44:33,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:44:33,558 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:44:33,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:44:33,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:44:33,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:44:33,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:44:33,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:44:33,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:44:33,561 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:44:33,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:44:33,561 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:44:33,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:44:33,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:44:33,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:44:33,562 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:44:33,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:44:33,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:44:33,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:44:33,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:44:33,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:44:33,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:44:33,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:33,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:44:33,564 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:44:33,564 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_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:44:33,866 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:44:33,883 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:44:33,888 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:44:33,890 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:44:33,890 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:44:33,891 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-07-21 16:44:33,968 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a761d2d7/4b14c27fc946400ba675eb77cd783d3a/FLAGbc0bf5df9 [2020-07-21 16:44:34,450 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:44:34,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-07-21 16:44:34,465 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a761d2d7/4b14c27fc946400ba675eb77cd783d3a/FLAGbc0bf5df9 [2020-07-21 16:44:34,774 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a761d2d7/4b14c27fc946400ba675eb77cd783d3a [2020-07-21 16:44:34,783 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:44:34,785 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:44:34,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:44:34,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:44:34,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:44:34,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:44:34" (1/1) ... [2020-07-21 16:44:34,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ef8221c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:34, skipping insertion in model container [2020-07-21 16:44:34,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:44:34" (1/1) ... [2020-07-21 16:44:34,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:44:34,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:44:35,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:44:35,043 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:44:35,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:44:35,193 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:44:35,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:35 WrapperNode [2020-07-21 16:44:35,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:44:35,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:44:35,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:44:35,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:44:35,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:35" (1/1) ... [2020-07-21 16:44:35,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:35" (1/1) ... [2020-07-21 16:44:35,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:35" (1/1) ... [2020-07-21 16:44:35,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:35" (1/1) ... [2020-07-21 16:44:35,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:35" (1/1) ... [2020-07-21 16:44:35,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:35" (1/1) ... [2020-07-21 16:44:35,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:35" (1/1) ... [2020-07-21 16:44:35,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:44:35,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:44:35,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:44:35,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:44:35,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:44:35,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:44:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:44:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:44:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-07-21 16:44:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-07-21 16:44:35,331 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:44:35,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:44:35,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 16:44:35,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:44:35,332 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-07-21 16:44:35,332 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-07-21 16:44:35,332 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-07-21 16:44:35,332 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-07-21 16:44:35,333 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-07-21 16:44:35,333 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-07-21 16:44:35,333 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-07-21 16:44:35,334 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-07-21 16:44:35,334 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-07-21 16:44:35,334 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-07-21 16:44:35,334 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-07-21 16:44:35,335 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-07-21 16:44:35,335 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-07-21 16:44:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-07-21 16:44:35,336 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-07-21 16:44:35,337 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-07-21 16:44:35,338 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-07-21 16:44:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-07-21 16:44:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-07-21 16:44:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-07-21 16:44:35,339 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-07-21 16:44:35,340 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-07-21 16:44:35,340 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-07-21 16:44:35,340 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-07-21 16:44:35,340 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-07-21 16:44:35,340 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-07-21 16:44:35,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 16:44:35,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:44:35,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:44:35,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:44:35,341 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:44:35,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:44:35,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:44:35,819 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:44:35,819 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-21 16:44:35,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:44:35 BoogieIcfgContainer [2020-07-21 16:44:35,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:44:35,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:44:35,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:44:35,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:44:35,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:44:34" (1/3) ... [2020-07-21 16:44:35,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b53e66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:44:35, skipping insertion in model container [2020-07-21 16:44:35,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:35" (2/3) ... [2020-07-21 16:44:35,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b53e66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:44:35, skipping insertion in model container [2020-07-21 16:44:35,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:44:35" (3/3) ... [2020-07-21 16:44:35,833 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-07-21 16:44:35,844 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:44:35,852 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:44:35,867 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:44:35,893 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:44:35,893 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:44:35,893 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:44:35,893 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:44:35,894 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:44:35,894 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:44:35,894 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:44:35,894 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:44:35,913 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-07-21 16:44:35,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 16:44:35,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:35,920 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] [2020-07-21 16:44:35,921 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:35,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:35,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1663477819, now seen corresponding path program 1 times [2020-07-21 16:44:35,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:35,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143559068] [2020-07-21 16:44:35,935 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:36,073 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:44:36,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:36,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:44:36,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:36,184 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:44:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:36,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:36,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143559068] [2020-07-21 16:44:36,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:36,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 16:44:36,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617953047] [2020-07-21 16:44:36,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:44:36,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:36,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:44:36,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:44:36,238 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 6 states. [2020-07-21 16:44:36,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:36,419 INFO L93 Difference]: Finished difference Result 149 states and 212 transitions. [2020-07-21 16:44:36,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:44:36,421 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-07-21 16:44:36,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:36,432 INFO L225 Difference]: With dead ends: 149 [2020-07-21 16:44:36,432 INFO L226 Difference]: Without dead ends: 86 [2020-07-21 16:44:36,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-07-21 16:44:36,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-21 16:44:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 63. [2020-07-21 16:44:36,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-21 16:44:36,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2020-07-21 16:44:36,491 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 32 [2020-07-21 16:44:36,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:36,492 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2020-07-21 16:44:36,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:44:36,492 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2020-07-21 16:44:36,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 16:44:36,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:36,494 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, 1, 1, 1] [2020-07-21 16:44:36,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:36,704 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:36,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:36,705 INFO L82 PathProgramCache]: Analyzing trace with hash 554149680, now seen corresponding path program 1 times [2020-07-21 16:44:36,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:36,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966602216] [2020-07-21 16:44:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:36,793 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:44:36,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:36,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 16:44:36,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:36,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:36,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966602216] [2020-07-21 16:44:36,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:36,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 16:44:36,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317522140] [2020-07-21 16:44:36,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:44:36,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:36,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:44:36,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:44:36,879 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand 6 states. [2020-07-21 16:44:37,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:37,015 INFO L93 Difference]: Finished difference Result 126 states and 160 transitions. [2020-07-21 16:44:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 16:44:37,015 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-07-21 16:44:37,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:37,017 INFO L225 Difference]: With dead ends: 126 [2020-07-21 16:44:37,018 INFO L226 Difference]: Without dead ends: 75 [2020-07-21 16:44:37,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:44:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-21 16:44:37,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2020-07-21 16:44:37,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-21 16:44:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2020-07-21 16:44:37,030 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 36 [2020-07-21 16:44:37,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:37,030 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2020-07-21 16:44:37,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:44:37,030 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2020-07-21 16:44:37,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 16:44:37,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:37,032 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, 1, 1, 1] [2020-07-21 16:44:37,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:37,248 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:37,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:37,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1134794062, now seen corresponding path program 1 times [2020-07-21 16:44:37,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:37,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235962487] [2020-07-21 16:44:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:37,337 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:44:37,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:37,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:44:37,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:37,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:37,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235962487] [2020-07-21 16:44:37,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:37,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:44:37,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55659568] [2020-07-21 16:44:37,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:44:37,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:37,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:44:37,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:44:37,385 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand 5 states. [2020-07-21 16:44:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:37,486 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-07-21 16:44:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:44:37,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-07-21 16:44:37,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:37,488 INFO L225 Difference]: With dead ends: 116 [2020-07-21 16:44:37,488 INFO L226 Difference]: Without dead ends: 65 [2020-07-21 16:44:37,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:44:37,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-21 16:44:37,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-07-21 16:44:37,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 16:44:37,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-07-21 16:44:37,497 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 36 [2020-07-21 16:44:37,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:37,498 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-07-21 16:44:37,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:44:37,498 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-07-21 16:44:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 16:44:37,499 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:37,499 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, 1, 1, 1] [2020-07-21 16:44:37,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:37,714 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:37,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:37,714 INFO L82 PathProgramCache]: Analyzing trace with hash 544839181, now seen corresponding path program 1 times [2020-07-21 16:44:37,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:37,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040393527] [2020-07-21 16:44:37,715 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:37,786 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:44:37,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:37,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 16:44:37,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:37,848 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:44:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:37,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:44:37,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:44:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:37,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040393527] [2020-07-21 16:44:37,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:44:37,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-21 16:44:37,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089882365] [2020-07-21 16:44:37,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 16:44:37,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:37,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 16:44:37,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:44:37,932 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 7 states. [2020-07-21 16:44:38,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:38,100 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2020-07-21 16:44:38,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:44:38,101 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-07-21 16:44:38,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:38,103 INFO L225 Difference]: With dead ends: 127 [2020-07-21 16:44:38,103 INFO L226 Difference]: Without dead ends: 91 [2020-07-21 16:44:38,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-21 16:44:38,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-21 16:44:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-07-21 16:44:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-21 16:44:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2020-07-21 16:44:38,114 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 41 [2020-07-21 16:44:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:38,115 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2020-07-21 16:44:38,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 16:44:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2020-07-21 16:44:38,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 16:44:38,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:38,117 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, 1, 1, 1] [2020-07-21 16:44:38,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:38,333 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:38,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:38,333 INFO L82 PathProgramCache]: Analyzing trace with hash -41966833, now seen corresponding path program 1 times [2020-07-21 16:44:38,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:38,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654793786] [2020-07-21 16:44:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:38,409 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:44:38,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:38,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 16:44:38,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:38,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:44:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:38,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654793786] [2020-07-21 16:44:38,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:44:38,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-07-21 16:44:38,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942498691] [2020-07-21 16:44:38,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 16:44:38,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:38,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 16:44:38,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-21 16:44:38,555 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 11 states. [2020-07-21 16:44:38,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:38,901 INFO L93 Difference]: Finished difference Result 225 states and 297 transitions. [2020-07-21 16:44:38,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 16:44:38,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 16:44:38,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:38,904 INFO L225 Difference]: With dead ends: 225 [2020-07-21 16:44:38,904 INFO L226 Difference]: Without dead ends: 127 [2020-07-21 16:44:38,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:44:38,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-21 16:44:38,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-07-21 16:44:38,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-21 16:44:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-07-21 16:44:38,915 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 41 [2020-07-21 16:44:38,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:38,915 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-07-21 16:44:38,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 16:44:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-07-21 16:44:38,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 16:44:38,916 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:38,917 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, 1, 1, 1] [2020-07-21 16:44:39,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:39,131 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:39,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:39,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1730910575, now seen corresponding path program 1 times [2020-07-21 16:44:39,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:39,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986239715] [2020-07-21 16:44:39,133 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:39,190 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:39,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:39,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 16:44:39,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:44:39,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:39,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986239715] [2020-07-21 16:44:39,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:39,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:44:39,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252510404] [2020-07-21 16:44:39,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:44:39,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:39,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:44:39,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:44:39,211 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 3 states. [2020-07-21 16:44:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:39,222 INFO L93 Difference]: Finished difference Result 147 states and 179 transitions. [2020-07-21 16:44:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:44:39,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-07-21 16:44:39,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:39,224 INFO L225 Difference]: With dead ends: 147 [2020-07-21 16:44:39,224 INFO L226 Difference]: Without dead ends: 84 [2020-07-21 16:44:39,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:44:39,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-21 16:44:39,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-07-21 16:44:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-21 16:44:39,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2020-07-21 16:44:39,233 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 41 [2020-07-21 16:44:39,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:39,233 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2020-07-21 16:44:39,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:44:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2020-07-21 16:44:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 16:44:39,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:39,235 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, 1, 1, 1] [2020-07-21 16:44:39,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:39,449 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:39,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1512055857, now seen corresponding path program 1 times [2020-07-21 16:44:39,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:39,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356018707] [2020-07-21 16:44:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:39,512 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:39,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:39,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 16:44:39,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:44:39,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:39,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356018707] [2020-07-21 16:44:39,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:39,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:44:39,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620839482] [2020-07-21 16:44:39,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:44:39,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:39,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:44:39,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:44:39,545 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand 3 states. [2020-07-21 16:44:39,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:39,555 INFO L93 Difference]: Finished difference Result 162 states and 192 transitions. [2020-07-21 16:44:39,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:44:39,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-07-21 16:44:39,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:39,557 INFO L225 Difference]: With dead ends: 162 [2020-07-21 16:44:39,557 INFO L226 Difference]: Without dead ends: 86 [2020-07-21 16:44:39,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:44:39,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-21 16:44:39,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-07-21 16:44:39,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 16:44:39,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2020-07-21 16:44:39,566 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 41 [2020-07-21 16:44:39,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:39,566 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2020-07-21 16:44:39,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:44:39,566 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2020-07-21 16:44:39,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-21 16:44:39,567 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:39,568 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, 1, 1, 1, 1, 1] [2020-07-21 16:44:39,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:39,783 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:39,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1069051379, now seen corresponding path program 1 times [2020-07-21 16:44:39,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:39,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407013991] [2020-07-21 16:44:39,784 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:39,844 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:39,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:39,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:44:39,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:44:39,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:44:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:44:39,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407013991] [2020-07-21 16:44:39,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:44:39,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 16:44:39,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705648624] [2020-07-21 16:44:39,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:44:39,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:39,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:44:39,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:44:39,917 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand 6 states. [2020-07-21 16:44:39,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:39,941 INFO L93 Difference]: Finished difference Result 167 states and 199 transitions. [2020-07-21 16:44:39,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 16:44:39,942 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-07-21 16:44:39,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:39,943 INFO L225 Difference]: With dead ends: 167 [2020-07-21 16:44:39,943 INFO L226 Difference]: Without dead ends: 91 [2020-07-21 16:44:39,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:44:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-21 16:44:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-07-21 16:44:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-21 16:44:39,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2020-07-21 16:44:39,952 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 43 [2020-07-21 16:44:39,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:39,952 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2020-07-21 16:44:39,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:44:39,952 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2020-07-21 16:44:39,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-21 16:44:39,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:39,954 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1] [2020-07-21 16:44:40,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:40,164 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:40,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1705682887, now seen corresponding path program 2 times [2020-07-21 16:44:40,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:40,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053549413] [2020-07-21 16:44:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:40,238 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:40,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:40,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 16:44:40,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:44:40,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:44:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:44:40,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053549413] [2020-07-21 16:44:40,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:44:40,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 16:44:40,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794845688] [2020-07-21 16:44:40,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 16:44:40,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:40,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 16:44:40,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-21 16:44:40,359 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 10 states. [2020-07-21 16:44:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:40,411 INFO L93 Difference]: Finished difference Result 175 states and 208 transitions. [2020-07-21 16:44:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:44:40,412 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-07-21 16:44:40,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:40,413 INFO L225 Difference]: With dead ends: 175 [2020-07-21 16:44:40,413 INFO L226 Difference]: Without dead ends: 99 [2020-07-21 16:44:40,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-21 16:44:40,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-07-21 16:44:40,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-07-21 16:44:40,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-21 16:44:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2020-07-21 16:44:40,437 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 49 [2020-07-21 16:44:40,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:40,439 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2020-07-21 16:44:40,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 16:44:40,440 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2020-07-21 16:44:40,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 16:44:40,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:40,442 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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, 1, 1, 1] [2020-07-21 16:44:40,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:40,659 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:40,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1580860481, now seen corresponding path program 3 times [2020-07-21 16:44:40,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:40,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357288677] [2020-07-21 16:44:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:40,796 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:40,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:40,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:44:40,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:40,810 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:44:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 16:44:40,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:40,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357288677] [2020-07-21 16:44:40,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:40,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:44:40,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852480362] [2020-07-21 16:44:40,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:44:40,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:40,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:44:40,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:44:40,830 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand 5 states. [2020-07-21 16:44:40,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:40,882 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2020-07-21 16:44:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:44:40,882 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-07-21 16:44:40,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:40,883 INFO L225 Difference]: With dead ends: 111 [2020-07-21 16:44:40,883 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 16:44:40,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:44:40,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 16:44:40,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 16:44:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 16:44:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 16:44:40,885 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-07-21 16:44:40,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:40,885 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 16:44:40,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:44:40,885 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 16:44:40,886 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 16:44:41,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:41,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 16:44:41,319 INFO L268 CegarLoopResult]: For program point L60(line 60) no Hoare annotation was computed. [2020-07-21 16:44:41,319 INFO L268 CegarLoopResult]: For program point L60-2(line 60) no Hoare annotation was computed. [2020-07-21 16:44:41,320 INFO L268 CegarLoopResult]: For program point L60-4(lines 54 72) no Hoare annotation was computed. [2020-07-21 16:44:41,320 INFO L268 CegarLoopResult]: For program point L56-1(line 56) no Hoare annotation was computed. [2020-07-21 16:44:41,320 INFO L268 CegarLoopResult]: For program point L56-3(line 56) no Hoare annotation was computed. [2020-07-21 16:44:41,320 INFO L271 CegarLoopResult]: At program point L56-5(line 56) the Hoare annotation is: true [2020-07-21 16:44:41,320 INFO L268 CegarLoopResult]: For program point L52-1(lines 52 73) no Hoare annotation was computed. [2020-07-21 16:44:41,320 INFO L268 CegarLoopResult]: For program point L56-6(line 56) no Hoare annotation was computed. [2020-07-21 16:44:41,321 INFO L268 CegarLoopResult]: For program point L52-2(lines 52 73) no Hoare annotation was computed. [2020-07-21 16:44:41,321 INFO L271 CegarLoopResult]: At program point L52-4(lines 52 73) the Hoare annotation is: true [2020-07-21 16:44:41,321 INFO L268 CegarLoopResult]: For program point L52-5(lines 52 73) no Hoare annotation was computed. [2020-07-21 16:44:41,321 INFO L264 CegarLoopResult]: At program point L65(line 65) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-07-21 16:44:41,321 INFO L268 CegarLoopResult]: For program point L65-1(line 65) no Hoare annotation was computed. [2020-07-21 16:44:41,321 INFO L268 CegarLoopResult]: For program point L61(lines 61 70) no Hoare annotation was computed. [2020-07-21 16:44:41,321 INFO L268 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-07-21 16:44:41,322 INFO L268 CegarLoopResult]: For program point L57-2(line 57) no Hoare annotation was computed. [2020-07-21 16:44:41,322 INFO L264 CegarLoopResult]: At program point L66(line 66) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-07-21 16:44:41,322 INFO L268 CegarLoopResult]: For program point L66-1(line 66) no Hoare annotation was computed. [2020-07-21 16:44:41,322 INFO L268 CegarLoopResult]: For program point parse_expression_listFINAL(lines 47 75) no Hoare annotation was computed. [2020-07-21 16:44:41,322 INFO L268 CegarLoopResult]: For program point L62(lines 62 64) no Hoare annotation was computed. [2020-07-21 16:44:41,322 INFO L271 CegarLoopResult]: At program point parse_expression_listENTRY(lines 47 75) the Hoare annotation is: true [2020-07-21 16:44:41,322 INFO L268 CegarLoopResult]: For program point L54(lines 54 72) no Hoare annotation was computed. [2020-07-21 16:44:41,323 INFO L268 CegarLoopResult]: For program point parse_expression_listEXIT(lines 47 75) no Hoare annotation was computed. [2020-07-21 16:44:41,323 INFO L268 CegarLoopResult]: For program point L59-1(line 59) no Hoare annotation was computed. [2020-07-21 16:44:41,323 INFO L268 CegarLoopResult]: For program point L59-2(line 59) no Hoare annotation was computed. [2020-07-21 16:44:41,323 INFO L268 CegarLoopResult]: For program point L55(line 55) no Hoare annotation was computed. [2020-07-21 16:44:41,323 INFO L268 CegarLoopResult]: For program point L59-4(line 59) no Hoare annotation was computed. [2020-07-21 16:44:41,323 INFO L268 CegarLoopResult]: For program point L59-6(line 59) no Hoare annotation was computed. [2020-07-21 16:44:41,323 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-07-21 16:44:41,323 INFO L271 CegarLoopResult]: At program point L59-8(line 59) the Hoare annotation is: true [2020-07-21 16:44:41,324 INFO L268 CegarLoopResult]: For program point L59-9(line 59) no Hoare annotation was computed. [2020-07-21 16:44:41,324 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:44:41,324 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:44:41,324 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:44:41,324 INFO L268 CegarLoopResult]: For program point r_strncpyFINAL(line 31) no Hoare annotation was computed. [2020-07-21 16:44:41,324 INFO L268 CegarLoopResult]: For program point r_strncpyEXIT(line 31) no Hoare annotation was computed. [2020-07-21 16:44:41,324 INFO L271 CegarLoopResult]: At program point r_strncpyENTRY(line 31) the Hoare annotation is: true [2020-07-21 16:44:41,325 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:44:41,325 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 16:44:41,325 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:44:41,325 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:44:41,325 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 76 85) the Hoare annotation is: true [2020-07-21 16:44:41,325 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 76 85) no Hoare annotation was computed. [2020-07-21 16:44:41,325 INFO L271 CegarLoopResult]: At program point L83(line 83) the Hoare annotation is: true [2020-07-21 16:44:41,326 INFO L268 CegarLoopResult]: For program point L83-1(line 83) no Hoare annotation was computed. [2020-07-21 16:44:41,326 INFO L268 CegarLoopResult]: For program point L79-2(lines 79 81) no Hoare annotation was computed. [2020-07-21 16:44:41,326 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 76 85) no Hoare annotation was computed. [2020-07-21 16:44:41,326 INFO L271 CegarLoopResult]: At program point L79-3(lines 79 81) the Hoare annotation is: true [2020-07-21 16:44:41,326 INFO L268 CegarLoopResult]: For program point L79-4(lines 79 81) no Hoare annotation was computed. [2020-07-21 16:44:41,326 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 16:44:41,326 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 16:44:41,326 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 16:44:41,327 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 16:44:41,327 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 16:44:41,327 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 16:44:41,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:44:41 BoogieIcfgContainer [2020-07-21 16:44:41,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:44:41,340 INFO L168 Benchmark]: Toolchain (without parser) took 6555.39 ms. Allocated memory was 137.9 MB in the beginning and 273.2 MB in the end (delta: 135.3 MB). Free memory was 102.6 MB in the beginning and 235.0 MB in the end (delta: -132.4 MB). Peak memory consumption was 118.7 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:41,341 INFO L168 Benchmark]: CDTParser took 0.60 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 16:44:41,342 INFO L168 Benchmark]: CACSL2BoogieTranslator took 408.14 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 102.2 MB in the beginning and 178.6 MB in the end (delta: -76.4 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:41,343 INFO L168 Benchmark]: Boogie Preprocessor took 52.27 ms. Allocated memory is still 202.4 MB. Free memory was 178.6 MB in the beginning and 176.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:41,343 INFO L168 Benchmark]: RCFGBuilder took 576.76 ms. Allocated memory is still 202.4 MB. Free memory was 176.6 MB in the beginning and 146.9 MB in the end (delta: 29.7 MB). Peak memory consumption was 29.7 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:41,344 INFO L168 Benchmark]: TraceAbstraction took 5512.56 ms. Allocated memory was 202.4 MB in the beginning and 273.2 MB in the end (delta: 70.8 MB). Free memory was 146.9 MB in the beginning and 235.0 MB in the end (delta: -88.1 MB). Peak memory consumption was 98.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:41,348 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 408.14 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 102.2 MB in the beginning and 178.6 MB in the end (delta: -76.4 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 52.27 ms. Allocated memory is still 202.4 MB. Free memory was 178.6 MB in the beginning and 176.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 576.76 ms. Allocated memory is still 202.4 MB. Free memory was 176.6 MB in the beginning and 146.9 MB in the end (delta: 29.7 MB). Peak memory consumption was 29.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5512.56 ms. Allocated memory was 202.4 MB in the beginning and 273.2 MB in the end (delta: 70.8 MB). Free memory was 146.9 MB in the beginning and 235.0 MB in the end (delta: -88.1 MB). Peak memory consumption was 98.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 79]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.2s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 514 SDtfs, 487 SDslu, 1460 SDs, 0 SdLazy, 607 SolverSat, 101 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 601 GetRequests, 534 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=9, 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, 10 MinimizatonAttempts, 118 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 56 PreInvPairs, 127 NumberOfFragments, 22 HoareAnnotationTreeSize, 56 FomulaSimplifications, 87 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 14 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 417 NumberOfCodeBlocks, 325 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 577 ConstructedInterpolants, 0 QuantifiedInterpolants, 47428 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1290 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 78/120 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 correct! Received shutdown request...