/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -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 0.1.25-5644d1e-m [2020-08-19 06:56:13,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:56:13,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:56:13,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:56:13,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:56:13,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:56:13,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:56:13,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:56:13,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:56:13,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:56:13,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:56:13,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:56:13,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:56:13,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:56:13,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:56:13,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:56:13,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:56:13,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:56:13,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:56:13,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:56:13,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:56:13,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:56:13,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:56:13,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:56:13,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 06:56:13,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 06:56:13,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 06:56:13,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 06:56:13,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 06:56:13,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 06:56:13,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 06:56:13,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 06:56:13,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 06:56:13,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 06:56:13,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 06:56:13,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 06:56:13,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 06:56:13,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 06:56:13,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:56:13,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:56:13,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:56:13,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 06:56:13,487 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:56:13,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:56:13,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:56:13,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:56:13,489 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:56:13,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:56:13,489 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:56:13,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:56:13,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:56:13,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:56:13,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:56:13,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:56:13,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:56:13,491 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:56:13,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:56:13,491 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:56:13,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:56:13,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:56:13,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:56:13,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:56:13,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:56:13,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:56:13,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:56:13,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:56:13,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:56:13,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:56:13,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:56:13,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:56:13,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:56:13,494 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:56:13,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:56:13,791 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:56:13,794 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:56:13,796 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:56:13,796 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:56:13,797 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-19 06:56:13,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da0c591ed/0a2177efbdf34deba0a5c9f4b047225d/FLAG9fc066c44 [2020-08-19 06:56:14,365 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:56:14,366 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-19 06:56:14,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da0c591ed/0a2177efbdf34deba0a5c9f4b047225d/FLAG9fc066c44 [2020-08-19 06:56:14,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da0c591ed/0a2177efbdf34deba0a5c9f4b047225d [2020-08-19 06:56:14,712 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:56:14,713 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:56:14,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:56:14,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:56:14,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:56:14,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:56:14" (1/1) ... [2020-08-19 06:56:14,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c07bf98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:14, skipping insertion in model container [2020-08-19 06:56:14,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:56:14" (1/1) ... [2020-08-19 06:56:14,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:56:14,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:56:14,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:56:14,996 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:56:15,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:56:15,150 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:56:15,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:15 WrapperNode [2020-08-19 06:56:15,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:56:15,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:56:15,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:56:15,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:56:15,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:15" (1/1) ... [2020-08-19 06:56:15,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:15" (1/1) ... [2020-08-19 06:56:15,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:15" (1/1) ... [2020-08-19 06:56:15,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:15" (1/1) ... [2020-08-19 06:56:15,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:15" (1/1) ... [2020-08-19 06:56:15,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:15" (1/1) ... [2020-08-19 06:56:15,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:15" (1/1) ... [2020-08-19 06:56:15,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:56:15,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:56:15,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:56:15,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:56:15,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-19 06:56:15,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:56:15,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:56:15,257 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 06:56:15,257 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-08-19 06:56:15,257 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-08-19 06:56:15,258 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:56:15,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:56:15,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 06:56:15,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 06:56:15,258 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-08-19 06:56:15,258 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-08-19 06:56:15,259 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-08-19 06:56:15,259 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-08-19 06:56:15,259 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-08-19 06:56:15,259 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-08-19 06:56:15,259 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-08-19 06:56:15,259 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-08-19 06:56:15,260 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-19 06:56:15,260 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-08-19 06:56:15,260 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-19 06:56:15,260 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-08-19 06:56:15,260 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-08-19 06:56:15,260 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-19 06:56:15,260 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-08-19 06:56:15,261 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-08-19 06:56:15,261 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-08-19 06:56:15,261 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-08-19 06:56:15,261 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-08-19 06:56:15,261 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-08-19 06:56:15,261 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-08-19 06:56:15,261 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-08-19 06:56:15,262 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-08-19 06:56:15,262 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-08-19 06:56:15,262 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-08-19 06:56:15,262 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-08-19 06:56:15,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 06:56:15,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 06:56:15,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 06:56:15,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 06:56:15,263 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:56:15,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:56:15,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:56:15,687 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:56:15,688 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-19 06:56:15,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:56:15 BoogieIcfgContainer [2020-08-19 06:56:15,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:56:15,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:56:15,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:56:15,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:56:15,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:56:14" (1/3) ... [2020-08-19 06:56:15,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe2913b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:56:15, skipping insertion in model container [2020-08-19 06:56:15,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:56:15" (2/3) ... [2020-08-19 06:56:15,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe2913b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:56:15, skipping insertion in model container [2020-08-19 06:56:15,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:56:15" (3/3) ... [2020-08-19 06:56:15,700 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-19 06:56:15,710 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:56:15,718 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:56:15,731 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:56:15,752 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:56:15,752 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:56:15,752 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:56:15,752 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:56:15,752 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:56:15,753 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:56:15,753 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:56:15,753 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:56:15,769 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-08-19 06:56:15,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-19 06:56:15,776 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:15,777 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] [2020-08-19 06:56:15,777 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:15,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:15,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1663477819, now seen corresponding path program 1 times [2020-08-19 06:56:15,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:15,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786361731] [2020-08-19 06:56:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:15,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:15,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:56:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:16,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786361731] [2020-08-19 06:56:16,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:16,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 06:56:16,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853814522] [2020-08-19 06:56:16,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:56:16,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:16,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:56:16,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:56:16,028 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 4 states. [2020-08-19 06:56:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:16,222 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2020-08-19 06:56:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 06:56:16,224 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-08-19 06:56:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:16,234 INFO L225 Difference]: With dead ends: 104 [2020-08-19 06:56:16,235 INFO L226 Difference]: Without dead ends: 49 [2020-08-19 06:56:16,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:56:16,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-19 06:56:16,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-08-19 06:56:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 06:56:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-08-19 06:56:16,289 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 32 [2020-08-19 06:56:16,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:16,290 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-08-19 06:56:16,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:56:16,291 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-08-19 06:56:16,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-19 06:56:16,292 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:16,293 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] [2020-08-19 06:56:16,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:56:16,293 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:16,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:16,294 INFO L82 PathProgramCache]: Analyzing trace with hash 227833136, now seen corresponding path program 1 times [2020-08-19 06:56:16,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:16,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790897769] [2020-08-19 06:56:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:16,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:16,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 06:56:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:16,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790897769] [2020-08-19 06:56:16,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:16,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 06:56:16,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649025885] [2020-08-19 06:56:16,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:56:16,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:16,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:56:16,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:56:16,384 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 5 states. [2020-08-19 06:56:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:16,531 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-08-19 06:56:16,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:56:16,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-08-19 06:56:16,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:16,533 INFO L225 Difference]: With dead ends: 90 [2020-08-19 06:56:16,533 INFO L226 Difference]: Without dead ends: 51 [2020-08-19 06:56:16,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:56:16,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-19 06:56:16,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-08-19 06:56:16,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-19 06:56:16,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-08-19 06:56:16,543 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 38 [2020-08-19 06:56:16,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:16,544 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-08-19 06:56:16,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:56:16,544 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-08-19 06:56:16,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 06:56:16,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:16,546 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:16,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:56:16,546 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:16,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:16,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1109616718, now seen corresponding path program 2 times [2020-08-19 06:56:16,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:16,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997855500] [2020-08-19 06:56:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:16,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:16,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 06:56:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:16,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997855500] [2020-08-19 06:56:16,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:16,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 06:56:16,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680109552] [2020-08-19 06:56:16,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:56:16,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:16,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:56:16,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:56:16,631 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 6 states. [2020-08-19 06:56:16,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:16,751 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-08-19 06:56:16,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:56:16,751 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-08-19 06:56:16,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:16,752 INFO L225 Difference]: With dead ends: 92 [2020-08-19 06:56:16,753 INFO L226 Difference]: Without dead ends: 53 [2020-08-19 06:56:16,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:56:16,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-19 06:56:16,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-08-19 06:56:16,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-19 06:56:16,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-08-19 06:56:16,762 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 40 [2020-08-19 06:56:16,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:16,762 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-08-19 06:56:16,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:56:16,762 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-08-19 06:56:16,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-19 06:56:16,763 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:16,764 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:16,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:56:16,764 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:16,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:16,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2091262388, now seen corresponding path program 3 times [2020-08-19 06:56:16,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:16,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096825290] [2020-08-19 06:56:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:16,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:16,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 06:56:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:16,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096825290] [2020-08-19 06:56:16,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:16,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:56:16,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954154738] [2020-08-19 06:56:16,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:56:16,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:16,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:56:16,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:56:16,871 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 7 states. [2020-08-19 06:56:16,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:17,000 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-08-19 06:56:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:56:17,000 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-08-19 06:56:17,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:17,001 INFO L225 Difference]: With dead ends: 94 [2020-08-19 06:56:17,001 INFO L226 Difference]: Without dead ends: 55 [2020-08-19 06:56:17,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:56:17,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-19 06:56:17,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-08-19 06:56:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 06:56:17,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-08-19 06:56:17,009 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 42 [2020-08-19 06:56:17,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:17,010 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-08-19 06:56:17,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:56:17,010 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-08-19 06:56:17,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-19 06:56:17,011 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:17,011 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] [2020-08-19 06:56:17,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:56:17,012 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:17,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:17,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1355467978, now seen corresponding path program 4 times [2020-08-19 06:56:17,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:17,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415034488] [2020-08-19 06:56:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:17,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:17,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 06:56:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:17,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415034488] [2020-08-19 06:56:17,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:17,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:56:17,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606934905] [2020-08-19 06:56:17,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:56:17,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:17,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:56:17,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:56:17,122 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 8 states. [2020-08-19 06:56:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:17,242 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2020-08-19 06:56:17,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:56:17,243 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-08-19 06:56:17,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:17,244 INFO L225 Difference]: With dead ends: 96 [2020-08-19 06:56:17,244 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 06:56:17,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:56:17,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 06:56:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-08-19 06:56:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-19 06:56:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-08-19 06:56:17,252 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 44 [2020-08-19 06:56:17,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:17,252 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-08-19 06:56:17,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:56:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-08-19 06:56:17,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-19 06:56:17,254 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:17,254 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:17,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:56:17,255 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:17,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:17,255 INFO L82 PathProgramCache]: Analyzing trace with hash 2051402808, now seen corresponding path program 5 times [2020-08-19 06:56:17,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:17,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112524836] [2020-08-19 06:56:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:17,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:17,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:56:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:17,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112524836] [2020-08-19 06:56:17,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:17,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:56:17,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753567777] [2020-08-19 06:56:17,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:56:17,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:17,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:56:17,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:56:17,380 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 9 states. [2020-08-19 06:56:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:17,541 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2020-08-19 06:56:17,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:56:17,542 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-08-19 06:56:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:17,543 INFO L225 Difference]: With dead ends: 98 [2020-08-19 06:56:17,543 INFO L226 Difference]: Without dead ends: 59 [2020-08-19 06:56:17,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:56:17,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-19 06:56:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-08-19 06:56:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-19 06:56:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-08-19 06:56:17,554 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 46 [2020-08-19 06:56:17,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:17,556 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-08-19 06:56:17,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:56:17,557 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-08-19 06:56:17,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-19 06:56:17,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:17,559 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:17,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:56:17,559 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:17,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:17,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1005818694, now seen corresponding path program 6 times [2020-08-19 06:56:17,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:17,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457760641] [2020-08-19 06:56:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:17,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:17,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 06:56:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:17,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457760641] [2020-08-19 06:56:17,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:17,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:56:17,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158372325] [2020-08-19 06:56:17,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:56:17,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:17,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:56:17,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:56:17,713 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 10 states. [2020-08-19 06:56:17,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:17,874 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2020-08-19 06:56:17,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:56:17,874 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-08-19 06:56:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:17,875 INFO L225 Difference]: With dead ends: 100 [2020-08-19 06:56:17,876 INFO L226 Difference]: Without dead ends: 61 [2020-08-19 06:56:17,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:56:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-19 06:56:17,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-08-19 06:56:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-19 06:56:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-08-19 06:56:17,892 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 48 [2020-08-19 06:56:17,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:17,892 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-08-19 06:56:17,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:56:17,893 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-08-19 06:56:17,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-19 06:56:17,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:17,895 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:56:17,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:56:17,895 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:17,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:17,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1238051652, now seen corresponding path program 7 times [2020-08-19 06:56:17,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:17,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423760554] [2020-08-19 06:56:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 06:56:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:56:18,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423760554] [2020-08-19 06:56:18,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:56:18,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:56:18,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345119808] [2020-08-19 06:56:18,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:56:18,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:18,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:56:18,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:56:18,037 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 11 states. [2020-08-19 06:56:18,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:18,189 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2020-08-19 06:56:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:56:18,190 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-08-19 06:56:18,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:18,191 INFO L225 Difference]: With dead ends: 101 [2020-08-19 06:56:18,191 INFO L226 Difference]: Without dead ends: 62 [2020-08-19 06:56:18,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:56:18,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-19 06:56:18,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-08-19 06:56:18,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-19 06:56:18,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-08-19 06:56:18,197 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 50 [2020-08-19 06:56:18,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:18,197 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-08-19 06:56:18,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:56:18,197 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-08-19 06:56:18,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-19 06:56:18,198 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:18,199 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] [2020-08-19 06:56:18,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:56:18,199 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:18,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:18,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1075624898, now seen corresponding path program 8 times [2020-08-19 06:56:18,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:18,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426097079] [2020-08-19 06:56:18,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 06:56:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-19 06:56:18,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426097079] [2020-08-19 06:56:18,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:18,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 06:56:18,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757855746] [2020-08-19 06:56:18,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:56:18,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:18,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:56:18,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:56:18,253 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 4 states. [2020-08-19 06:56:18,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:18,327 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2020-08-19 06:56:18,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 06:56:18,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-08-19 06:56:18,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:18,328 INFO L225 Difference]: With dead ends: 98 [2020-08-19 06:56:18,329 INFO L226 Difference]: Without dead ends: 63 [2020-08-19 06:56:18,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:56:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-19 06:56:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-19 06:56:18,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-19 06:56:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-08-19 06:56:18,334 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 52 [2020-08-19 06:56:18,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:18,335 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-08-19 06:56:18,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:56:18,335 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-08-19 06:56:18,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-19 06:56:18,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:18,336 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] [2020-08-19 06:56:18,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:56:18,336 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:18,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:18,337 INFO L82 PathProgramCache]: Analyzing trace with hash -856770180, now seen corresponding path program 1 times [2020-08-19 06:56:18,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:18,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744356204] [2020-08-19 06:56:18,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 06:56:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-19 06:56:18,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744356204] [2020-08-19 06:56:18,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:18,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 06:56:18,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313711046] [2020-08-19 06:56:18,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:56:18,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:18,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:56:18,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:56:18,455 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 7 states. [2020-08-19 06:56:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:18,673 INFO L93 Difference]: Finished difference Result 147 states and 185 transitions. [2020-08-19 06:56:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:56:18,673 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-08-19 06:56:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:18,676 INFO L225 Difference]: With dead ends: 147 [2020-08-19 06:56:18,676 INFO L226 Difference]: Without dead ends: 94 [2020-08-19 06:56:18,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:56:18,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-19 06:56:18,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-08-19 06:56:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-19 06:56:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-08-19 06:56:18,687 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 52 [2020-08-19 06:56:18,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:18,688 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-08-19 06:56:18,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:56:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-08-19 06:56:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-19 06:56:18,689 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:18,689 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] [2020-08-19 06:56:18,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:56:18,689 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:18,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:18,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1749253374, now seen corresponding path program 1 times [2020-08-19 06:56:18,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:18,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444042366] [2020-08-19 06:56:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 06:56:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-19 06:56:18,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444042366] [2020-08-19 06:56:18,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:18,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 06:56:18,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186592310] [2020-08-19 06:56:18,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:56:18,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:18,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:56:18,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:56:18,774 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 6 states. [2020-08-19 06:56:18,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:18,945 INFO L93 Difference]: Finished difference Result 132 states and 161 transitions. [2020-08-19 06:56:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:56:18,946 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-08-19 06:56:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:18,947 INFO L225 Difference]: With dead ends: 132 [2020-08-19 06:56:18,948 INFO L226 Difference]: Without dead ends: 81 [2020-08-19 06:56:18,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:56:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-19 06:56:18,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2020-08-19 06:56:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-19 06:56:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-08-19 06:56:18,954 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 52 [2020-08-19 06:56:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:18,954 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-08-19 06:56:18,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:56:18,955 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-08-19 06:56:18,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-19 06:56:18,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:18,956 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] [2020-08-19 06:56:18,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:56:18,956 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:18,956 INFO L82 PathProgramCache]: Analyzing trace with hash 694889275, now seen corresponding path program 1 times [2020-08-19 06:56:18,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:18,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706320134] [2020-08-19 06:56:18,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 06:56:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-08-19 06:56:19,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706320134] [2020-08-19 06:56:19,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:19,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 06:56:19,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551584365] [2020-08-19 06:56:19,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:56:19,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:19,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:56:19,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:56:19,028 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 7 states. [2020-08-19 06:56:19,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:19,324 INFO L93 Difference]: Finished difference Result 159 states and 204 transitions. [2020-08-19 06:56:19,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:56:19,324 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-08-19 06:56:19,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:19,326 INFO L225 Difference]: With dead ends: 159 [2020-08-19 06:56:19,326 INFO L226 Difference]: Without dead ends: 114 [2020-08-19 06:56:19,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:56:19,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-19 06:56:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-08-19 06:56:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-19 06:56:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2020-08-19 06:56:19,339 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 57 [2020-08-19 06:56:19,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:19,340 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2020-08-19 06:56:19,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:56:19,340 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2020-08-19 06:56:19,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-19 06:56:19,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:19,341 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] [2020-08-19 06:56:19,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:56:19,341 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:19,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:19,342 INFO L82 PathProgramCache]: Analyzing trace with hash -994054467, now seen corresponding path program 1 times [2020-08-19 06:56:19,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:19,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897982767] [2020-08-19 06:56:19,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 06:56:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-08-19 06:56:19,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897982767] [2020-08-19 06:56:19,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:19,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 06:56:19,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708188973] [2020-08-19 06:56:19,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:56:19,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:19,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:56:19,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:56:19,396 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand 6 states. [2020-08-19 06:56:19,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:19,526 INFO L93 Difference]: Finished difference Result 151 states and 191 transitions. [2020-08-19 06:56:19,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:56:19,526 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-19 06:56:19,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:19,527 INFO L225 Difference]: With dead ends: 151 [2020-08-19 06:56:19,527 INFO L226 Difference]: Without dead ends: 115 [2020-08-19 06:56:19,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:56:19,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-19 06:56:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 95. [2020-08-19 06:56:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-19 06:56:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2020-08-19 06:56:19,534 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 57 [2020-08-19 06:56:19,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:19,534 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2020-08-19 06:56:19,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:56:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2020-08-19 06:56:19,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-19 06:56:19,535 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:56:19,535 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] [2020-08-19 06:56:19,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:56:19,535 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:56:19,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:56:19,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1580860481, now seen corresponding path program 1 times [2020-08-19 06:56:19,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:56:19,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674401358] [2020-08-19 06:56:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:56:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:56:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 06:56:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:56:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-08-19 06:56:19,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674401358] [2020-08-19 06:56:19,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:56:19,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 06:56:19,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911269595] [2020-08-19 06:56:19,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:56:19,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:56:19,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:56:19,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:56:19,596 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 6 states. [2020-08-19 06:56:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:56:19,716 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-08-19 06:56:19,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:56:19,716 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-19 06:56:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:56:19,717 INFO L225 Difference]: With dead ends: 96 [2020-08-19 06:56:19,717 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 06:56:19,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:56:19,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 06:56:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 06:56:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 06:56:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 06:56:19,719 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-08-19 06:56:19,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:56:19,719 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 06:56:19,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:56:19,719 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 06:56:19,719 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 06:56:19,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:56:19,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 06:56:19,799 INFO L268 CegarLoopResult]: For program point L60(line 60) no Hoare annotation was computed. [2020-08-19 06:56:19,799 INFO L268 CegarLoopResult]: For program point L60-2(line 60) no Hoare annotation was computed. [2020-08-19 06:56:19,799 INFO L268 CegarLoopResult]: For program point L60-4(lines 54 72) no Hoare annotation was computed. [2020-08-19 06:56:19,799 INFO L268 CegarLoopResult]: For program point L56-1(line 56) no Hoare annotation was computed. [2020-08-19 06:56:19,799 INFO L268 CegarLoopResult]: For program point L56-3(line 56) no Hoare annotation was computed. [2020-08-19 06:56:19,799 INFO L271 CegarLoopResult]: At program point L56-5(line 56) the Hoare annotation is: true [2020-08-19 06:56:19,799 INFO L268 CegarLoopResult]: For program point L52-1(lines 52 73) no Hoare annotation was computed. [2020-08-19 06:56:19,800 INFO L268 CegarLoopResult]: For program point L56-6(line 56) no Hoare annotation was computed. [2020-08-19 06:56:19,800 INFO L268 CegarLoopResult]: For program point L52-2(lines 52 73) no Hoare annotation was computed. [2020-08-19 06:56:19,800 INFO L271 CegarLoopResult]: At program point L52-4(lines 52 73) the Hoare annotation is: true [2020-08-19 06:56:19,800 INFO L268 CegarLoopResult]: For program point L52-5(lines 52 73) no Hoare annotation was computed. [2020-08-19 06:56:19,800 INFO L264 CegarLoopResult]: At program point L65(line 65) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-08-19 06:56:19,800 INFO L268 CegarLoopResult]: For program point L65-1(line 65) no Hoare annotation was computed. [2020-08-19 06:56:19,800 INFO L268 CegarLoopResult]: For program point L61(lines 61 70) no Hoare annotation was computed. [2020-08-19 06:56:19,801 INFO L268 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-08-19 06:56:19,801 INFO L268 CegarLoopResult]: For program point L57-2(line 57) no Hoare annotation was computed. [2020-08-19 06:56:19,801 INFO L264 CegarLoopResult]: At program point L66(line 66) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-08-19 06:56:19,801 INFO L268 CegarLoopResult]: For program point L66-1(line 66) no Hoare annotation was computed. [2020-08-19 06:56:19,801 INFO L268 CegarLoopResult]: For program point parse_expression_listFINAL(lines 47 75) no Hoare annotation was computed. [2020-08-19 06:56:19,801 INFO L268 CegarLoopResult]: For program point L62(lines 62 64) no Hoare annotation was computed. [2020-08-19 06:56:19,801 INFO L264 CegarLoopResult]: At program point parse_expression_listENTRY(lines 47 75) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-19 06:56:19,802 INFO L268 CegarLoopResult]: For program point L54(lines 54 72) no Hoare annotation was computed. [2020-08-19 06:56:19,802 INFO L268 CegarLoopResult]: For program point parse_expression_listEXIT(lines 47 75) no Hoare annotation was computed. [2020-08-19 06:56:19,802 INFO L268 CegarLoopResult]: For program point L59-1(line 59) no Hoare annotation was computed. [2020-08-19 06:56:19,802 INFO L268 CegarLoopResult]: For program point L59-2(line 59) no Hoare annotation was computed. [2020-08-19 06:56:19,802 INFO L268 CegarLoopResult]: For program point L55(line 55) no Hoare annotation was computed. [2020-08-19 06:56:19,802 INFO L268 CegarLoopResult]: For program point L59-4(line 59) no Hoare annotation was computed. [2020-08-19 06:56:19,802 INFO L268 CegarLoopResult]: For program point L59-6(line 59) no Hoare annotation was computed. [2020-08-19 06:56:19,802 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-08-19 06:56:19,802 INFO L271 CegarLoopResult]: At program point L59-8(line 59) the Hoare annotation is: true [2020-08-19 06:56:19,803 INFO L268 CegarLoopResult]: For program point L59-9(line 59) no Hoare annotation was computed. [2020-08-19 06:56:19,803 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-19 06:56:19,803 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-19 06:56:19,803 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:56:19,803 INFO L268 CegarLoopResult]: For program point r_strncpyFINAL(line 31) no Hoare annotation was computed. [2020-08-19 06:56:19,803 INFO L268 CegarLoopResult]: For program point r_strncpyEXIT(line 31) no Hoare annotation was computed. [2020-08-19 06:56:19,803 INFO L271 CegarLoopResult]: At program point r_strncpyENTRY(line 31) the Hoare annotation is: true [2020-08-19 06:56:19,804 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 06:56:19,804 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 06:56:19,804 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 06:56:19,804 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 06:56:19,804 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 76 85) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-19 06:56:19,804 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 76 85) no Hoare annotation was computed. [2020-08-19 06:56:19,804 INFO L271 CegarLoopResult]: At program point L83(line 83) the Hoare annotation is: true [2020-08-19 06:56:19,804 INFO L268 CegarLoopResult]: For program point L83-1(line 83) no Hoare annotation was computed. [2020-08-19 06:56:19,804 INFO L268 CegarLoopResult]: For program point L79-2(lines 79 81) no Hoare annotation was computed. [2020-08-19 06:56:19,805 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 76 85) no Hoare annotation was computed. [2020-08-19 06:56:19,805 INFO L271 CegarLoopResult]: At program point L79-3(lines 79 81) the Hoare annotation is: true [2020-08-19 06:56:19,805 INFO L268 CegarLoopResult]: For program point L79-4(lines 79 81) no Hoare annotation was computed. [2020-08-19 06:56:19,805 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-19 06:56:19,805 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-19 06:56:19,805 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-19 06:56:19,805 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-19 06:56:19,805 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-19 06:56:19,806 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-19 06:56:19,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:56:19 BoogieIcfgContainer [2020-08-19 06:56:19,816 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:56:19,819 INFO L168 Benchmark]: Toolchain (without parser) took 5104.37 ms. Allocated memory was 140.5 MB in the beginning and 278.9 MB in the end (delta: 138.4 MB). Free memory was 102.4 MB in the beginning and 126.4 MB in the end (delta: -24.0 MB). Peak memory consumption was 114.4 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:19,819 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 06:56:19,820 INFO L168 Benchmark]: CACSL2BoogieTranslator took 436.62 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 102.2 MB in the beginning and 179.1 MB in the end (delta: -76.9 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:19,821 INFO L168 Benchmark]: Boogie Preprocessor took 49.69 ms. Allocated memory is still 202.9 MB. Free memory was 179.1 MB in the beginning and 176.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:19,821 INFO L168 Benchmark]: RCFGBuilder took 491.54 ms. Allocated memory is still 202.9 MB. Free memory was 176.2 MB in the beginning and 147.8 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:19,822 INFO L168 Benchmark]: TraceAbstraction took 4122.18 ms. Allocated memory was 202.9 MB in the beginning and 278.9 MB in the end (delta: 76.0 MB). Free memory was 147.2 MB in the beginning and 126.4 MB in the end (delta: 20.8 MB). Peak memory consumption was 96.8 MB. Max. memory is 7.1 GB. [2020-08-19 06:56:19,826 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 436.62 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 102.2 MB in the beginning and 179.1 MB in the end (delta: -76.9 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.69 ms. Allocated memory is still 202.9 MB. Free memory was 179.1 MB in the beginning and 176.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 491.54 ms. Allocated memory is still 202.9 MB. Free memory was 176.2 MB in the beginning and 147.8 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4122.18 ms. Allocated memory was 202.9 MB in the beginning and 278.9 MB in the end (delta: 76.0 MB). Free memory was 147.2 MB in the beginning and 126.4 MB in the end (delta: 20.8 MB). Peak memory consumption was 96.8 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: 3.9s, OverallIterations: 14, TraceHistogramMax: 8, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 732 SDtfs, 388 SDslu, 1954 SDs, 0 SdLazy, 1655 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 148 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 94 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 88 PreInvPairs, 113 NumberOfFragments, 35 HoareAnnotationTreeSize, 88 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 14 FomulaSimplificationsInter, 40 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 667 NumberOfCodeBlocks, 667 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 653 ConstructedInterpolants, 0 QuantifiedInterpolants, 57554 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 390/530 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...