/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 NOT_INCREMENTALLY -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 [2020-07-20 11:48:34,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:48:34,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:48:34,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:48:34,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:48:34,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:48:34,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:48:34,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:48:34,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:48:34,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:48:34,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:48:34,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:48:34,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:48:34,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:48:34,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:48:34,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:48:34,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:48:34,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:48:34,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:48:34,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:48:34,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:48:34,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:48:34,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:48:34,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:48:34,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:48:34,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:48:34,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:48:34,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:48:34,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:48:34,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-20 11:48:34,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:48:34,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:48:34,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:48:34,652 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 11:48:34,666 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:48:34,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:48:34,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:48:34,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:48:34,668 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:48:34,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:48:34,669 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:48:34,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:48:34,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:48:34,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:48:34,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:48:34,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:48:34,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:48:34,670 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:48:34,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:48:34,670 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:48:34,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:48:34,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:48:34,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:48:34,671 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:48:34,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:48:34,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:48:34,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:48:34,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:48:34,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:48:34,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:48:34,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:34,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:48:34,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:48:34,673 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 -> NOT_INCREMENTALLY [2020-07-20 11:48:34,968 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:48:34,981 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:48:34,984 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:48:34,985 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:48:34,986 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:48:34,987 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-07-20 11:48:35,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ae31e206/654a5eaf5f4343edb3e40ff1ecaef1d7/FLAGe3cdfec23 [2020-07-20 11:48:35,492 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:48:35,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-07-20 11:48:35,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ae31e206/654a5eaf5f4343edb3e40ff1ecaef1d7/FLAGe3cdfec23 [2020-07-20 11:48:35,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ae31e206/654a5eaf5f4343edb3e40ff1ecaef1d7 [2020-07-20 11:48:35,873 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:48:35,876 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:48:35,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:35,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:48:35,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:48:35,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:35" (1/1) ... [2020-07-20 11:48:35,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54e20d2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:35, skipping insertion in model container [2020-07-20 11:48:35,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:35" (1/1) ... [2020-07-20 11:48:35,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:48:35,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:48:36,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:36,119 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:48:36,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:36,274 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:48:36,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:36 WrapperNode [2020-07-20 11:48:36,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:36,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:48:36,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:48:36,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:48:36,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:36" (1/1) ... [2020-07-20 11:48:36,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:36" (1/1) ... [2020-07-20 11:48:36,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:36" (1/1) ... [2020-07-20 11:48:36,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:36" (1/1) ... [2020-07-20 11:48:36,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:36" (1/1) ... [2020-07-20 11:48:36,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:36" (1/1) ... [2020-07-20 11:48:36,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:36" (1/1) ... [2020-07-20 11:48:36,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:48:36,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:48:36,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:48:36,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:48:36,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:36" (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 11:48:36,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:48:36,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:48:36,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:48:36,388 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-07-20 11:48:36,389 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-07-20 11:48:36,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:48:36,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:48:36,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 11:48:36,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:48:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-07-20 11:48:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-07-20 11:48:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-07-20 11:48:36,392 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-07-20 11:48:36,392 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-07-20 11:48:36,392 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-07-20 11:48:36,393 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-07-20 11:48:36,393 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-07-20 11:48:36,393 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-07-20 11:48:36,394 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-07-20 11:48:36,394 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-07-20 11:48:36,395 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-07-20 11:48:36,395 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-07-20 11:48:36,396 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-07-20 11:48:36,396 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-07-20 11:48:36,396 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-07-20 11:48:36,398 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-07-20 11:48:36,398 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-07-20 11:48:36,399 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-07-20 11:48:36,399 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-07-20 11:48:36,399 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-07-20 11:48:36,399 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-07-20 11:48:36,399 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-07-20 11:48:36,399 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-07-20 11:48:36,399 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-07-20 11:48:36,400 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-07-20 11:48:36,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:48:36,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:48:36,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:48:36,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:48:36,401 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:48:36,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:48:36,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:48:36,802 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:48:36,802 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 11:48:36,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:36 BoogieIcfgContainer [2020-07-20 11:48:36,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:48:36,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:48:36,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:48:36,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:48:36,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:48:35" (1/3) ... [2020-07-20 11:48:36,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5805738c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:48:36, skipping insertion in model container [2020-07-20 11:48:36,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:36" (2/3) ... [2020-07-20 11:48:36,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5805738c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:48:36, skipping insertion in model container [2020-07-20 11:48:36,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:36" (3/3) ... [2020-07-20 11:48:36,814 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-07-20 11:48:36,821 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:48:36,827 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:48:36,840 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:48:36,861 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:48:36,862 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:48:36,862 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:48:36,862 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:48:36,862 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:48:36,862 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:48:36,862 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:48:36,862 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:48:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-07-20 11:48:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 11:48:36,886 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:36,887 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] [2020-07-20 11:48:36,887 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:36,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:36,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1663477819, now seen corresponding path program 1 times [2020-07-20 11:48:36,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:36,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233647314] [2020-07-20 11:48:36,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:48:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:37,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:48:37,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:37,071 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 11:48:37,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:37,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233647314] [2020-07-20 11:48:37,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:37,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:48:37,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982382623] [2020-07-20 11:48:37,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:48:37,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:37,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:48:37,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:48:37,099 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 2 states. [2020-07-20 11:48:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:37,130 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2020-07-20 11:48:37,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:48:37,132 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2020-07-20 11:48:37,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:37,144 INFO L225 Difference]: With dead ends: 102 [2020-07-20 11:48:37,145 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 11:48:37,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:48:37,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 11:48:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-07-20 11:48:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 11:48:37,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-07-20 11:48:37,193 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 32 [2020-07-20 11:48:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:37,194 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-07-20 11:48:37,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:48:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-07-20 11:48:37,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 11:48:37,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:37,196 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] [2020-07-20 11:48:37,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:37,412 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:37,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:37,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1140955694, now seen corresponding path program 1 times [2020-07-20 11:48:37,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:37,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654558147] [2020-07-20 11:48:37,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:48:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:37,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:48:37,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:37,527 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 11:48:37,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:37,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654558147] [2020-07-20 11:48:37,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:37,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:48:37,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137396933] [2020-07-20 11:48:37,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:48:37,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:37,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:48:37,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:48:37,532 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 3 states. [2020-07-20 11:48:37,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:37,553 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2020-07-20 11:48:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:48:37,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-07-20 11:48:37,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:37,555 INFO L225 Difference]: With dead ends: 83 [2020-07-20 11:48:37,555 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 11:48:37,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 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 11:48:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 11:48:37,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 11:48:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 11:48:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-07-20 11:48:37,566 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 36 [2020-07-20 11:48:37,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:37,566 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-07-20 11:48:37,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:48:37,567 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-07-20 11:48:37,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 11:48:37,568 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:37,569 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] [2020-07-20 11:48:37,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:37,784 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:37,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:37,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1359810412, now seen corresponding path program 1 times [2020-07-20 11:48:37,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:37,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514057171] [2020-07-20 11:48:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:48:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:37,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:48:37,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:37,895 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 11:48:37,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:37,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514057171] [2020-07-20 11:48:37,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:37,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:48:37,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290078974] [2020-07-20 11:48:37,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:48:37,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:37,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:48:37,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:48:37,898 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 3 states. [2020-07-20 11:48:37,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:37,920 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-07-20 11:48:37,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:48:37,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-07-20 11:48:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:37,922 INFO L225 Difference]: With dead ends: 90 [2020-07-20 11:48:37,923 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 11:48:37,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 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 11:48:37,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 11:48:37,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-07-20 11:48:37,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 11:48:37,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-07-20 11:48:37,931 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 36 [2020-07-20 11:48:37,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:37,931 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-07-20 11:48:37,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:48:37,931 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-07-20 11:48:37,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 11:48:37,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:37,933 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, 1, 1] [2020-07-20 11:48:38,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:38,147 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:38,148 INFO L82 PathProgramCache]: Analyzing trace with hash 446687854, now seen corresponding path program 1 times [2020-07-20 11:48:38,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:38,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967459841] [2020-07-20 11:48:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:48:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:38,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:48:38,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:38,251 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:48:38,261 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:48:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:48:38,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:38,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967459841] [2020-07-20 11:48:38,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:38,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:48:38,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338166923] [2020-07-20 11:48:38,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:48:38,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:38,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:48:38,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:48:38,275 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 5 states. [2020-07-20 11:48:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:38,375 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2020-07-20 11:48:38,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:48:38,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-07-20 11:48:38,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:38,379 INFO L225 Difference]: With dead ends: 109 [2020-07-20 11:48:38,379 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 11:48:38,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 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 11:48:38,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 11:48:38,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-07-20 11:48:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-20 11:48:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2020-07-20 11:48:38,393 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 38 [2020-07-20 11:48:38,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:38,394 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2020-07-20 11:48:38,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:48:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2020-07-20 11:48:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 11:48:38,395 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:38,396 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, 1, 1] [2020-07-20 11:48:38,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:38,609 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:38,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:38,610 INFO L82 PathProgramCache]: Analyzing trace with hash -140118160, now seen corresponding path program 1 times [2020-07-20 11:48:38,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:38,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073795687] [2020-07-20 11:48:38,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:48:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:38,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:48:38,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:38,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:48:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:38,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073795687] [2020-07-20 11:48:38,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:48:38,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 11:48:38,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068184417] [2020-07-20 11:48:38,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:48:38,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:38,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:48:38,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:48:38,761 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 6 states. [2020-07-20 11:48:38,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:38,790 INFO L93 Difference]: Finished difference Result 103 states and 125 transitions. [2020-07-20 11:48:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:48:38,791 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-07-20 11:48:38,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:38,792 INFO L225 Difference]: With dead ends: 103 [2020-07-20 11:48:38,792 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 11:48:38,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:48:38,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 11:48:38,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-20 11:48:38,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 11:48:38,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-07-20 11:48:38,800 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 38 [2020-07-20 11:48:38,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:38,801 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-07-20 11:48:38,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:48:38,801 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-07-20 11:48:38,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 11:48:38,802 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:38,803 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:48:39,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:39,016 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:39,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:39,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1723419274, now seen corresponding path program 2 times [2020-07-20 11:48:39,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:39,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424758092] [2020-07-20 11:48:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:48:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:39,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:48:39,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:39,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:48:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:39,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424758092] [2020-07-20 11:48:39,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:48:39,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 11:48:39,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550151551] [2020-07-20 11:48:39,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:48:39,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:39,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:48:39,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:48:39,210 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 10 states. [2020-07-20 11:48:39,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:39,254 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2020-07-20 11:48:39,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:48:39,255 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-07-20 11:48:39,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:39,256 INFO L225 Difference]: With dead ends: 111 [2020-07-20 11:48:39,256 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 11:48:39,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:48:39,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 11:48:39,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-07-20 11:48:39,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 11:48:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-07-20 11:48:39,265 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 44 [2020-07-20 11:48:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:39,265 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-07-20 11:48:39,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:48:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-07-20 11:48:39,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 11:48:39,267 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:39,267 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:48:39,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:39,484 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:39,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:39,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1443576194, now seen corresponding path program 3 times [2020-07-20 11:48:39,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:39,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689891838] [2020-07-20 11:48:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:48:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:39,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:48:39,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-07-20 11:48:39,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:39,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689891838] [2020-07-20 11:48:39,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:39,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 11:48:39,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715278972] [2020-07-20 11:48:39,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:48:39,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:39,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:48:39,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:48:39,657 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 6 states. [2020-07-20 11:48:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:39,780 INFO L93 Difference]: Finished difference Result 159 states and 197 transitions. [2020-07-20 11:48:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:48:39,781 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-07-20 11:48:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:39,782 INFO L225 Difference]: With dead ends: 159 [2020-07-20 11:48:39,782 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 11:48:39,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:48:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 11:48:39,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2020-07-20 11:48:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 11:48:39,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2020-07-20 11:48:39,800 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 52 [2020-07-20 11:48:39,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:39,803 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2020-07-20 11:48:39,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:48:39,804 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2020-07-20 11:48:39,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 11:48:39,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:39,805 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:48:40,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:40,007 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:40,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:40,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1162447360, now seen corresponding path program 1 times [2020-07-20 11:48:40,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:40,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684554228] [2020-07-20 11:48:40,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:48:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:40,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:48:40,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-07-20 11:48:40,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:40,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684554228] [2020-07-20 11:48:40,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:40,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:48:40,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591371311] [2020-07-20 11:48:40,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:48:40,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:40,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:48:40,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:48:40,115 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand 5 states. [2020-07-20 11:48:40,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:40,202 INFO L93 Difference]: Finished difference Result 144 states and 173 transitions. [2020-07-20 11:48:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:48:40,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-07-20 11:48:40,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:40,204 INFO L225 Difference]: With dead ends: 144 [2020-07-20 11:48:40,204 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 11:48:40,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 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 11:48:40,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 11:48:40,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2020-07-20 11:48:40,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 11:48:40,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-07-20 11:48:40,211 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 52 [2020-07-20 11:48:40,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:40,212 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-07-20 11:48:40,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:48:40,212 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-07-20 11:48:40,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 11:48:40,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:40,213 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] [2020-07-20 11:48:40,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:40,420 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:40,422 INFO L82 PathProgramCache]: Analyzing trace with hash 108083261, now seen corresponding path program 1 times [2020-07-20 11:48:40,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:40,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253258791] [2020-07-20 11:48:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:48:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:40,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:48:40,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:40,515 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:48:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 11:48:40,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:40,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253258791] [2020-07-20 11:48:40,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:40,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 11:48:40,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837527309] [2020-07-20 11:48:40,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:48:40,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:40,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:48:40,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:48:40,532 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 6 states. [2020-07-20 11:48:40,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:40,650 INFO L93 Difference]: Finished difference Result 168 states and 208 transitions. [2020-07-20 11:48:40,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:48:40,651 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-07-20 11:48:40,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:40,653 INFO L225 Difference]: With dead ends: 168 [2020-07-20 11:48:40,653 INFO L226 Difference]: Without dead ends: 123 [2020-07-20 11:48:40,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:48:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-20 11:48:40,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 91. [2020-07-20 11:48:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-20 11:48:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-07-20 11:48:40,663 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 57 [2020-07-20 11:48:40,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:40,663 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-07-20 11:48:40,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:48:40,663 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-07-20 11:48:40,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 11:48:40,665 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:40,665 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] [2020-07-20 11:48:40,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:40,879 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:40,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:40,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1580860481, now seen corresponding path program 1 times [2020-07-20 11:48:40,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:40,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022353297] [2020-07-20 11:48:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:48:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:40,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:48:40,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:40,980 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:48:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 11:48:40,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:40,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022353297] [2020-07-20 11:48:40,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:40,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:48:40,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216614216] [2020-07-20 11:48:40,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:48:40,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:40,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:48:40,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:48:40,994 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 5 states. [2020-07-20 11:48:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:41,061 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2020-07-20 11:48:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:48:41,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-07-20 11:48:41,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:41,062 INFO L225 Difference]: With dead ends: 92 [2020-07-20 11:48:41,062 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:48:41,063 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 [2020-07-20 11:48:41,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:48:41,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:48:41,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:48:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:48:41,065 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-07-20 11:48:41,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:41,065 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:48:41,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:48:41,065 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:48:41,065 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:48:41,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:41,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:48:41,363 INFO L268 CegarLoopResult]: For program point L60(line 60) no Hoare annotation was computed. [2020-07-20 11:48:41,364 INFO L268 CegarLoopResult]: For program point L60-2(line 60) no Hoare annotation was computed. [2020-07-20 11:48:41,364 INFO L268 CegarLoopResult]: For program point L60-4(lines 54 72) no Hoare annotation was computed. [2020-07-20 11:48:41,364 INFO L268 CegarLoopResult]: For program point L56-1(line 56) no Hoare annotation was computed. [2020-07-20 11:48:41,364 INFO L268 CegarLoopResult]: For program point L56-3(line 56) no Hoare annotation was computed. [2020-07-20 11:48:41,364 INFO L271 CegarLoopResult]: At program point L56-5(line 56) the Hoare annotation is: true [2020-07-20 11:48:41,365 INFO L268 CegarLoopResult]: For program point L52-1(lines 52 73) no Hoare annotation was computed. [2020-07-20 11:48:41,365 INFO L268 CegarLoopResult]: For program point L56-6(line 56) no Hoare annotation was computed. [2020-07-20 11:48:41,365 INFO L268 CegarLoopResult]: For program point L52-2(lines 52 73) no Hoare annotation was computed. [2020-07-20 11:48:41,365 INFO L271 CegarLoopResult]: At program point L52-4(lines 52 73) the Hoare annotation is: true [2020-07-20 11:48:41,365 INFO L268 CegarLoopResult]: For program point L52-5(lines 52 73) no Hoare annotation was computed. [2020-07-20 11:48:41,365 INFO L264 CegarLoopResult]: At program point L65(line 65) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-07-20 11:48:41,366 INFO L268 CegarLoopResult]: For program point L65-1(line 65) no Hoare annotation was computed. [2020-07-20 11:48:41,366 INFO L268 CegarLoopResult]: For program point L61(lines 61 70) no Hoare annotation was computed. [2020-07-20 11:48:41,367 INFO L268 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-07-20 11:48:41,367 INFO L268 CegarLoopResult]: For program point L57-2(line 57) no Hoare annotation was computed. [2020-07-20 11:48:41,367 INFO L264 CegarLoopResult]: At program point L66(line 66) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-07-20 11:48:41,367 INFO L268 CegarLoopResult]: For program point L66-1(line 66) no Hoare annotation was computed. [2020-07-20 11:48:41,367 INFO L268 CegarLoopResult]: For program point parse_expression_listFINAL(lines 47 75) no Hoare annotation was computed. [2020-07-20 11:48:41,367 INFO L268 CegarLoopResult]: For program point L62(lines 62 64) no Hoare annotation was computed. [2020-07-20 11:48:41,367 INFO L271 CegarLoopResult]: At program point parse_expression_listENTRY(lines 47 75) the Hoare annotation is: true [2020-07-20 11:48:41,368 INFO L268 CegarLoopResult]: For program point L54(lines 54 72) no Hoare annotation was computed. [2020-07-20 11:48:41,368 INFO L268 CegarLoopResult]: For program point parse_expression_listEXIT(lines 47 75) no Hoare annotation was computed. [2020-07-20 11:48:41,368 INFO L268 CegarLoopResult]: For program point L59-1(line 59) no Hoare annotation was computed. [2020-07-20 11:48:41,368 INFO L268 CegarLoopResult]: For program point L59-2(line 59) no Hoare annotation was computed. [2020-07-20 11:48:41,368 INFO L268 CegarLoopResult]: For program point L55(line 55) no Hoare annotation was computed. [2020-07-20 11:48:41,368 INFO L268 CegarLoopResult]: For program point L59-4(line 59) no Hoare annotation was computed. [2020-07-20 11:48:41,368 INFO L268 CegarLoopResult]: For program point L59-6(line 59) no Hoare annotation was computed. [2020-07-20 11:48:41,368 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-07-20 11:48:41,369 INFO L271 CegarLoopResult]: At program point L59-8(line 59) the Hoare annotation is: true [2020-07-20 11:48:41,369 INFO L268 CegarLoopResult]: For program point L59-9(line 59) no Hoare annotation was computed. [2020-07-20 11:48:41,369 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:48:41,369 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:48:41,369 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:48:41,369 INFO L268 CegarLoopResult]: For program point r_strncpyFINAL(line 31) no Hoare annotation was computed. [2020-07-20 11:48:41,369 INFO L268 CegarLoopResult]: For program point r_strncpyEXIT(line 31) no Hoare annotation was computed. [2020-07-20 11:48:41,369 INFO L271 CegarLoopResult]: At program point r_strncpyENTRY(line 31) the Hoare annotation is: true [2020-07-20 11:48:41,370 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:48:41,370 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:48:41,370 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:48:41,370 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:48:41,370 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 76 85) the Hoare annotation is: true [2020-07-20 11:48:41,373 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 76 85) no Hoare annotation was computed. [2020-07-20 11:48:41,373 INFO L271 CegarLoopResult]: At program point L83(line 83) the Hoare annotation is: true [2020-07-20 11:48:41,373 INFO L268 CegarLoopResult]: For program point L83-1(line 83) no Hoare annotation was computed. [2020-07-20 11:48:41,373 INFO L268 CegarLoopResult]: For program point L79-2(lines 79 81) no Hoare annotation was computed. [2020-07-20 11:48:41,373 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 76 85) no Hoare annotation was computed. [2020-07-20 11:48:41,373 INFO L271 CegarLoopResult]: At program point L79-3(lines 79 81) the Hoare annotation is: true [2020-07-20 11:48:41,373 INFO L268 CegarLoopResult]: For program point L79-4(lines 79 81) no Hoare annotation was computed. [2020-07-20 11:48:41,374 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-20 11:48:41,374 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-20 11:48:41,374 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 11:48:41,374 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-20 11:48:41,374 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-20 11:48:41,374 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-20 11:48:41,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:48:41 BoogieIcfgContainer [2020-07-20 11:48:41,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:48:41,385 INFO L168 Benchmark]: Toolchain (without parser) took 5509.90 ms. Allocated memory was 142.6 MB in the beginning and 255.9 MB in the end (delta: 113.2 MB). Free memory was 99.9 MB in the beginning and 194.7 MB in the end (delta: -94.8 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:41,386 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 142.6 MB. Free memory is still 118.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 11:48:41,386 INFO L168 Benchmark]: CACSL2BoogieTranslator took 398.14 ms. Allocated memory was 142.6 MB in the beginning and 199.8 MB in the end (delta: 57.1 MB). Free memory was 99.5 MB in the beginning and 177.1 MB in the end (delta: -77.7 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:41,387 INFO L168 Benchmark]: Boogie Preprocessor took 46.75 ms. Allocated memory is still 199.8 MB. Free memory was 177.1 MB in the beginning and 174.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:41,388 INFO L168 Benchmark]: RCFGBuilder took 483.99 ms. Allocated memory is still 199.8 MB. Free memory was 174.2 MB in the beginning and 144.9 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:41,389 INFO L168 Benchmark]: TraceAbstraction took 4575.67 ms. Allocated memory was 199.8 MB in the beginning and 255.9 MB in the end (delta: 56.1 MB). Free memory was 144.9 MB in the beginning and 194.7 MB in the end (delta: -49.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:41,395 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 142.6 MB. Free memory is still 118.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 398.14 ms. Allocated memory was 142.6 MB in the beginning and 199.8 MB in the end (delta: 57.1 MB). Free memory was 99.5 MB in the beginning and 177.1 MB in the end (delta: -77.7 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 46.75 ms. Allocated memory is still 199.8 MB. Free memory was 177.1 MB in the beginning and 174.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 483.99 ms. Allocated memory is still 199.8 MB. Free memory was 174.2 MB in the beginning and 144.9 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4575.67 ms. Allocated memory was 199.8 MB in the beginning and 255.9 MB in the end (delta: 56.1 MB). Free memory was 144.9 MB in the beginning and 194.7 MB in the end (delta: -49.8 MB). Peak memory consumption was 6.3 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: 4.4s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 524 SDtfs, 214 SDslu, 968 SDs, 0 SdLazy, 370 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 521 GetRequests, 481 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred 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: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 93 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 56 PreInvPairs, 79 NumberOfFragments, 22 HoareAnnotationTreeSize, 56 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 14 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 442 NumberOfCodeBlocks, 442 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 512 ConstructedInterpolants, 0 QuantifiedInterpolants, 42068 SizeOfPredicates, 16 NumberOfNonLiveVariables, 1602 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 12 InterpolantComputations, 8 PerfectInterpolantSequences, 261/295 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...