/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -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 0.1.25-177f698 [2020-08-21 15:51:12,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:51:12,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:51:12,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:51:12,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:51:12,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:51:12,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:51:12,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:51:12,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:51:12,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:51:12,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:51:12,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:51:12,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:51:12,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:51:12,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:51:12,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:51:12,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:51:12,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:51:12,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:51:12,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:51:12,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:51:12,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:51:12,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:51:12,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:51:12,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 15:51:12,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 15:51:12,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 15:51:12,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 15:51:12,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 15:51:12,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 15:51:12,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:51:12,972 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:51:12,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:51:12,974 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 [2020-08-21 15:51:13,016 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:51:13,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:51:13,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:51:13,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:51:13,019 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:51:13,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:51:13,019 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:51:13,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:51:13,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:51:13,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:51:13,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:51:13,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:51:13,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:51:13,022 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:51:13,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:51:13,022 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:51:13,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:51:13,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:51:13,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:51:13,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:51:13,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:51:13,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:51:13,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:51:13,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:51:13,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:51:13,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:51:13,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:51:13,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:51:13,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:51:13,025 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=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 15:51:13,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:51:13,304 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:51:13,308 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:51:13,309 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:51:13,309 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:51:13,310 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-21 15:51:13,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3aa9d5ab/9387aef060a44908979cdb35d4aa8a54/FLAG85e12d0f2 [2020-08-21 15:51:13,843 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:51:13,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-21 15:51:13,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3aa9d5ab/9387aef060a44908979cdb35d4aa8a54/FLAG85e12d0f2 [2020-08-21 15:51:14,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3aa9d5ab/9387aef060a44908979cdb35d4aa8a54 [2020-08-21 15:51:14,229 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:51:14,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:51:14,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:51:14,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:51:14,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:51:14,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:51:14" (1/1) ... [2020-08-21 15:51:14,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697fd79d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:14, skipping insertion in model container [2020-08-21 15:51:14,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:51:14" (1/1) ... [2020-08-21 15:51:14,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:51:14,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:51:14,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:51:14,467 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:51:14,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:51:14,596 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:51:14,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:14 WrapperNode [2020-08-21 15:51:14,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:51:14,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:51:14,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:51:14,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:51:14,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:14" (1/1) ... [2020-08-21 15:51:14,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:14" (1/1) ... [2020-08-21 15:51:14,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:14" (1/1) ... [2020-08-21 15:51:14,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:14" (1/1) ... [2020-08-21 15:51:14,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:14" (1/1) ... [2020-08-21 15:51:14,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:14" (1/1) ... [2020-08-21 15:51:14,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:14" (1/1) ... [2020-08-21 15:51:14,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:51:14,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:51:14,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:51:14,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:51:14,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:14" (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 [2020-08-21 15:51:14,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:51:14,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:51:14,723 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 15:51:14,724 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-08-21 15:51:14,724 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-08-21 15:51:14,725 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:51:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:51:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 15:51:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 15:51:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-08-21 15:51:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-08-21 15:51:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-08-21 15:51:14,727 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-08-21 15:51:14,728 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-08-21 15:51:14,728 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-08-21 15:51:14,729 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-08-21 15:51:14,729 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-08-21 15:51:14,729 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-21 15:51:14,729 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-08-21 15:51:14,729 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-21 15:51:14,730 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-08-21 15:51:14,730 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-08-21 15:51:14,730 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-21 15:51:14,731 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-08-21 15:51:14,732 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-08-21 15:51:14,733 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-08-21 15:51:14,733 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-08-21 15:51:14,733 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-08-21 15:51:14,734 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-08-21 15:51:14,734 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-08-21 15:51:14,734 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-08-21 15:51:14,734 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-08-21 15:51:14,734 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-08-21 15:51:14,734 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-08-21 15:51:14,734 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-08-21 15:51:14,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 15:51:14,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 15:51:14,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 15:51:14,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 15:51:14,735 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:51:14,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:51:14,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:51:15,160 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:51:15,160 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-21 15:51:15,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:51:15 BoogieIcfgContainer [2020-08-21 15:51:15,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:51:15,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:51:15,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:51:15,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:51:15,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:51:14" (1/3) ... [2020-08-21 15:51:15,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab59425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:51:15, skipping insertion in model container [2020-08-21 15:51:15,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:51:14" (2/3) ... [2020-08-21 15:51:15,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab59425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:51:15, skipping insertion in model container [2020-08-21 15:51:15,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:51:15" (3/3) ... [2020-08-21 15:51:15,174 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-08-21 15:51:15,184 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:51:15,192 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:51:15,207 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:51:15,232 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:51:15,232 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:51:15,232 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:51:15,232 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:51:15,233 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:51:15,233 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:51:15,233 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:51:15,233 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:51:15,253 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-08-21 15:51:15,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 15:51:15,260 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:51:15,261 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] [2020-08-21 15:51:15,262 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:51:15,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:51:15,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1663477819, now seen corresponding path program 1 times [2020-08-21 15:51:15,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:51:15,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425691781] [2020-08-21 15:51:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:51:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:15,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:51:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:15,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 15:51:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:51:15,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425691781] [2020-08-21 15:51:15,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:51:15,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:51:15,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012930464] [2020-08-21 15:51:15,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:51:15,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:51:15,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:51:15,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:51:15,517 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 4 states. [2020-08-21 15:51:15,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:51:15,762 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2020-08-21 15:51:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 15:51:15,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-08-21 15:51:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:51:15,777 INFO L225 Difference]: With dead ends: 104 [2020-08-21 15:51:15,778 INFO L226 Difference]: Without dead ends: 49 [2020-08-21 15:51:15,784 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 [2020-08-21 15:51:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-21 15:51:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-08-21 15:51:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 15:51:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-08-21 15:51:15,828 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 32 [2020-08-21 15:51:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:51:15,829 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-08-21 15:51:15,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:51:15,829 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-08-21 15:51:15,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 15:51:15,831 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:51:15,831 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] [2020-08-21 15:51:15,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:51:15,832 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:51:15,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:51:15,833 INFO L82 PathProgramCache]: Analyzing trace with hash 227833136, now seen corresponding path program 1 times [2020-08-21 15:51:15,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:51:15,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98212206] [2020-08-21 15:51:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:51:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:15,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:51:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:15,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 15:51:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:51:15,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98212206] [2020-08-21 15:51:15,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:51:15,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 15:51:15,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999900637] [2020-08-21 15:51:15,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:51:15,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:51:15,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:51:15,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:51:15,956 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 5 states. [2020-08-21 15:51:16,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:51:16,121 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-08-21 15:51:16,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:51:16,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-08-21 15:51:16,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:51:16,124 INFO L225 Difference]: With dead ends: 90 [2020-08-21 15:51:16,124 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 15:51:16,125 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 [2020-08-21 15:51:16,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 15:51:16,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-08-21 15:51:16,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-21 15:51:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-08-21 15:51:16,135 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 38 [2020-08-21 15:51:16,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:51:16,135 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-08-21 15:51:16,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:51:16,136 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-08-21 15:51:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 15:51:16,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:51:16,137 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] [2020-08-21 15:51:16,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:51:16,138 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:51:16,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:51:16,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1109616718, now seen corresponding path program 2 times [2020-08-21 15:51:16,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:51:16,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20332262] [2020-08-21 15:51:16,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:51:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:16,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:51:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:16,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 15:51:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:51:16,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20332262] [2020-08-21 15:51:16,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:51:16,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 15:51:16,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12606016] [2020-08-21 15:51:16,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:51:16,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:51:16,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:51:16,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:51:16,225 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 6 states. [2020-08-21 15:51:16,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:51:16,358 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-08-21 15:51:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:51:16,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-08-21 15:51:16,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:51:16,360 INFO L225 Difference]: With dead ends: 92 [2020-08-21 15:51:16,360 INFO L226 Difference]: Without dead ends: 53 [2020-08-21 15:51:16,361 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 [2020-08-21 15:51:16,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-21 15:51:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-08-21 15:51:16,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-21 15:51:16,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-08-21 15:51:16,369 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 40 [2020-08-21 15:51:16,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:51:16,370 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-08-21 15:51:16,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:51:16,370 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-08-21 15:51:16,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 15:51:16,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:51:16,372 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] [2020-08-21 15:51:16,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:51:16,372 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:51:16,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:51:16,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2091262388, now seen corresponding path program 3 times [2020-08-21 15:51:16,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:51:16,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932157267] [2020-08-21 15:51:16,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:51:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:16,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:51:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:16,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 15:51:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:51:16,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932157267] [2020-08-21 15:51:16,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:51:16,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 15:51:16,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969981122] [2020-08-21 15:51:16,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:51:16,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:51:16,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:51:16,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:51:16,468 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 7 states. [2020-08-21 15:51:16,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:51:16,614 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-08-21 15:51:16,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:51:16,615 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-08-21 15:51:16,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:51:16,616 INFO L225 Difference]: With dead ends: 94 [2020-08-21 15:51:16,616 INFO L226 Difference]: Without dead ends: 55 [2020-08-21 15:51:16,617 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 [2020-08-21 15:51:16,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-21 15:51:16,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-08-21 15:51:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 15:51:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-08-21 15:51:16,625 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 42 [2020-08-21 15:51:16,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:51:16,626 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-08-21 15:51:16,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:51:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-08-21 15:51:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-21 15:51:16,627 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:51:16,627 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] [2020-08-21 15:51:16,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:51:16,628 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:51:16,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:51:16,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1355467978, now seen corresponding path program 4 times [2020-08-21 15:51:16,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:51:16,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006667873] [2020-08-21 15:51:16,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:51:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:16,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:51:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:16,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 15:51:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:51:16,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006667873] [2020-08-21 15:51:16,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:51:16,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 15:51:16,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454744491] [2020-08-21 15:51:16,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:51:16,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:51:16,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:51:16,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:51:16,756 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 8 states. [2020-08-21 15:51:16,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:51:16,886 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2020-08-21 15:51:16,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 15:51:16,886 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-08-21 15:51:16,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:51:16,888 INFO L225 Difference]: With dead ends: 96 [2020-08-21 15:51:16,888 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 15:51:16,889 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 [2020-08-21 15:51:16,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 15:51:16,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-08-21 15:51:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-21 15:51:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-08-21 15:51:16,897 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 44 [2020-08-21 15:51:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:51:16,898 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-08-21 15:51:16,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:51:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-08-21 15:51:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 15:51:16,899 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:51:16,899 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] [2020-08-21 15:51:16,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:51:16,900 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:51:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:51:16,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2051402808, now seen corresponding path program 5 times [2020-08-21 15:51:16,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:51:16,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369896184] [2020-08-21 15:51:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:51:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:17,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:51:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:17,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 15:51:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:51:17,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369896184] [2020-08-21 15:51:17,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:51:17,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 15:51:17,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092402350] [2020-08-21 15:51:17,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:51:17,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:51:17,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:51:17,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:51:17,057 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 9 states. [2020-08-21 15:51:17,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:51:17,222 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2020-08-21 15:51:17,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:51:17,223 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-08-21 15:51:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:51:17,224 INFO L225 Difference]: With dead ends: 98 [2020-08-21 15:51:17,224 INFO L226 Difference]: Without dead ends: 59 [2020-08-21 15:51:17,225 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 [2020-08-21 15:51:17,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-21 15:51:17,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-08-21 15:51:17,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-21 15:51:17,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-08-21 15:51:17,232 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 46 [2020-08-21 15:51:17,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:51:17,232 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-08-21 15:51:17,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:51:17,232 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-08-21 15:51:17,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 15:51:17,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:51:17,234 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] [2020-08-21 15:51:17,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:51:17,234 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:51:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:51:17,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1005818694, now seen corresponding path program 6 times [2020-08-21 15:51:17,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:51:17,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642986770] [2020-08-21 15:51:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:51:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:17,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:51:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:17,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 15:51:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:51:17,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642986770] [2020-08-21 15:51:17,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:51:17,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 15:51:17,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833504842] [2020-08-21 15:51:17,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:51:17,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:51:17,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:51:17,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:51:17,328 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 10 states. [2020-08-21 15:51:17,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:51:17,450 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2020-08-21 15:51:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 15:51:17,450 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-08-21 15:51:17,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:51:17,452 INFO L225 Difference]: With dead ends: 100 [2020-08-21 15:51:17,452 INFO L226 Difference]: Without dead ends: 61 [2020-08-21 15:51:17,453 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 [2020-08-21 15:51:17,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-21 15:51:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-08-21 15:51:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 15:51:17,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-08-21 15:51:17,473 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 48 [2020-08-21 15:51:17,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:51:17,473 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-08-21 15:51:17,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:51:17,473 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-08-21 15:51:17,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-21 15:51:17,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:51:17,478 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] [2020-08-21 15:51:17,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:51:17,479 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:51:17,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:51:17,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1238051652, now seen corresponding path program 7 times [2020-08-21 15:51:17,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:51:17,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476149306] [2020-08-21 15:51:17,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:51:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:17,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:51:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:17,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 15:51:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:51:17,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476149306] [2020-08-21 15:51:17,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:51:17,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 15:51:17,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925449447] [2020-08-21 15:51:17,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 15:51:17,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:51:17,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 15:51:17,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:51:17,637 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 11 states. [2020-08-21 15:51:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:51:17,781 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2020-08-21 15:51:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 15:51:17,782 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-08-21 15:51:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:51:17,783 INFO L225 Difference]: With dead ends: 101 [2020-08-21 15:51:17,783 INFO L226 Difference]: Without dead ends: 62 [2020-08-21 15:51:17,784 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 [2020-08-21 15:51:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-21 15:51:17,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-08-21 15:51:17,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-21 15:51:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-08-21 15:51:17,791 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 50 [2020-08-21 15:51:17,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:51:17,791 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-08-21 15:51:17,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 15:51:17,791 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-08-21 15:51:17,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 15:51:17,792 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:51:17,793 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] [2020-08-21 15:51:17,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:51:17,793 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:51:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:51:17,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1075624898, now seen corresponding path program 8 times [2020-08-21 15:51:17,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:51:17,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870194978] [2020-08-21 15:51:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:51:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:17,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:51:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:17,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 15:51:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-21 15:51:17,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870194978] [2020-08-21 15:51:17,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:51:17,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 15:51:17,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223770827] [2020-08-21 15:51:17,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 15:51:17,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:51:17,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 15:51:17,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 15:51:17,893 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 4 states. [2020-08-21 15:51:18,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:51:18,005 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2020-08-21 15:51:18,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 15:51:18,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-08-21 15:51:18,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:51:18,007 INFO L225 Difference]: With dead ends: 98 [2020-08-21 15:51:18,007 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 15:51:18,008 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 [2020-08-21 15:51:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 15:51:18,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-21 15:51:18,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 15:51:18,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-08-21 15:51:18,023 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 52 [2020-08-21 15:51:18,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:51:18,024 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-08-21 15:51:18,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 15:51:18,024 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-08-21 15:51:18,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 15:51:18,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:51:18,026 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] [2020-08-21 15:51:18,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:51:18,026 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:51:18,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:51:18,026 INFO L82 PathProgramCache]: Analyzing trace with hash -856770180, now seen corresponding path program 1 times [2020-08-21 15:51:18,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:51:18,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141114796] [2020-08-21 15:51:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:51:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:18,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:51:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:18,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 15:51:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-21 15:51:18,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141114796] [2020-08-21 15:51:18,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:51:18,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 15:51:18,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117705789] [2020-08-21 15:51:18,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:51:18,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:51:18,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:51:18,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:51:18,116 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 7 states. [2020-08-21 15:51:18,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:51:18,330 INFO L93 Difference]: Finished difference Result 147 states and 185 transitions. [2020-08-21 15:51:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:51:18,331 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-08-21 15:51:18,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:51:18,334 INFO L225 Difference]: With dead ends: 147 [2020-08-21 15:51:18,334 INFO L226 Difference]: Without dead ends: 94 [2020-08-21 15:51:18,335 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 [2020-08-21 15:51:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-21 15:51:18,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-08-21 15:51:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 15:51:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-08-21 15:51:18,345 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 52 [2020-08-21 15:51:18,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:51:18,345 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-08-21 15:51:18,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:51:18,346 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-08-21 15:51:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-21 15:51:18,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:51:18,347 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] [2020-08-21 15:51:18,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:51:18,347 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:51:18,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:51:18,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1749253374, now seen corresponding path program 1 times [2020-08-21 15:51:18,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:51:18,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240469099] [2020-08-21 15:51:18,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:51:18,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:18,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:51:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:18,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 15:51:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-21 15:51:18,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240469099] [2020-08-21 15:51:18,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:51:18,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 15:51:18,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894149661] [2020-08-21 15:51:18,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:51:18,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:51:18,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:51:18,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:51:18,420 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 6 states. [2020-08-21 15:51:18,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:51:18,574 INFO L93 Difference]: Finished difference Result 132 states and 161 transitions. [2020-08-21 15:51:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:51:18,574 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-08-21 15:51:18,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:51:18,576 INFO L225 Difference]: With dead ends: 132 [2020-08-21 15:51:18,576 INFO L226 Difference]: Without dead ends: 81 [2020-08-21 15:51:18,577 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 [2020-08-21 15:51:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-21 15:51:18,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2020-08-21 15:51:18,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-21 15:51:18,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-08-21 15:51:18,583 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 52 [2020-08-21 15:51:18,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:51:18,583 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-08-21 15:51:18,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:51:18,584 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-08-21 15:51:18,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 15:51:18,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:51:18,585 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] [2020-08-21 15:51:18,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 15:51:18,585 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:51:18,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:51:18,586 INFO L82 PathProgramCache]: Analyzing trace with hash 694889275, now seen corresponding path program 1 times [2020-08-21 15:51:18,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:51:18,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016159104] [2020-08-21 15:51:18,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:51:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:18,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:51:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:18,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 15:51:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-08-21 15:51:18,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016159104] [2020-08-21 15:51:18,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:51:18,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 15:51:18,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719579399] [2020-08-21 15:51:18,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:51:18,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:51:18,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:51:18,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:51:18,674 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 7 states. [2020-08-21 15:51:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:51:19,009 INFO L93 Difference]: Finished difference Result 159 states and 204 transitions. [2020-08-21 15:51:19,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 15:51:19,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-08-21 15:51:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:51:19,012 INFO L225 Difference]: With dead ends: 159 [2020-08-21 15:51:19,012 INFO L226 Difference]: Without dead ends: 114 [2020-08-21 15:51:19,014 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 [2020-08-21 15:51:19,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-21 15:51:19,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-08-21 15:51:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 15:51:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2020-08-21 15:51:19,026 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 57 [2020-08-21 15:51:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:51:19,027 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2020-08-21 15:51:19,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:51:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2020-08-21 15:51:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 15:51:19,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:51:19,028 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] [2020-08-21 15:51:19,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 15:51:19,029 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:51:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:51:19,029 INFO L82 PathProgramCache]: Analyzing trace with hash -994054467, now seen corresponding path program 1 times [2020-08-21 15:51:19,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:51:19,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713872044] [2020-08-21 15:51:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:51:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:19,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:51:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:19,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 15:51:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-08-21 15:51:19,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713872044] [2020-08-21 15:51:19,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:51:19,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 15:51:19,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361182773] [2020-08-21 15:51:19,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:51:19,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:51:19,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:51:19,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:51:19,112 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand 6 states. [2020-08-21 15:51:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:51:19,271 INFO L93 Difference]: Finished difference Result 151 states and 191 transitions. [2020-08-21 15:51:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:51:19,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-21 15:51:19,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:51:19,274 INFO L225 Difference]: With dead ends: 151 [2020-08-21 15:51:19,274 INFO L226 Difference]: Without dead ends: 115 [2020-08-21 15:51:19,274 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 [2020-08-21 15:51:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-21 15:51:19,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 95. [2020-08-21 15:51:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-21 15:51:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2020-08-21 15:51:19,280 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 57 [2020-08-21 15:51:19,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:51:19,281 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2020-08-21 15:51:19,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:51:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2020-08-21 15:51:19,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 15:51:19,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:51:19,282 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] [2020-08-21 15:51:19,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 15:51:19,283 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:51:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:51:19,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1580860481, now seen corresponding path program 1 times [2020-08-21 15:51:19,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:51:19,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934499371] [2020-08-21 15:51:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:51:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:19,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:51:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:19,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 15:51:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:51:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-08-21 15:51:19,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934499371] [2020-08-21 15:51:19,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:51:19,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 15:51:19,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882030256] [2020-08-21 15:51:19,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:51:19,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:51:19,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:51:19,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:51:19,351 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 6 states. [2020-08-21 15:51:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:51:19,477 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-08-21 15:51:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:51:19,478 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-21 15:51:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:51:19,478 INFO L225 Difference]: With dead ends: 96 [2020-08-21 15:51:19,478 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 15:51:19,479 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 [2020-08-21 15:51:19,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 15:51:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 15:51:19,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 15:51:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 15:51:19,480 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-08-21 15:51:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:51:19,481 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 15:51:19,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:51:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 15:51:19,481 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 15:51:19,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 15:51:19,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 15:51:19,583 INFO L268 CegarLoopResult]: For program point L60(line 60) no Hoare annotation was computed. [2020-08-21 15:51:19,583 INFO L268 CegarLoopResult]: For program point L60-2(line 60) no Hoare annotation was computed. [2020-08-21 15:51:19,583 INFO L268 CegarLoopResult]: For program point L60-4(lines 54 72) no Hoare annotation was computed. [2020-08-21 15:51:19,583 INFO L268 CegarLoopResult]: For program point L56-1(line 56) no Hoare annotation was computed. [2020-08-21 15:51:19,584 INFO L268 CegarLoopResult]: For program point L56-3(line 56) no Hoare annotation was computed. [2020-08-21 15:51:19,584 INFO L271 CegarLoopResult]: At program point L56-5(line 56) the Hoare annotation is: true [2020-08-21 15:51:19,584 INFO L268 CegarLoopResult]: For program point L52-1(lines 52 73) no Hoare annotation was computed. [2020-08-21 15:51:19,584 INFO L268 CegarLoopResult]: For program point L56-6(line 56) no Hoare annotation was computed. [2020-08-21 15:51:19,584 INFO L268 CegarLoopResult]: For program point L52-2(lines 52 73) no Hoare annotation was computed. [2020-08-21 15:51:19,585 INFO L271 CegarLoopResult]: At program point L52-4(lines 52 73) the Hoare annotation is: true [2020-08-21 15:51:19,585 INFO L268 CegarLoopResult]: For program point L52-5(lines 52 73) no Hoare annotation was computed. [2020-08-21 15:51:19,585 INFO L264 CegarLoopResult]: At program point L65(line 65) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-08-21 15:51:19,585 INFO L268 CegarLoopResult]: For program point L65-1(line 65) no Hoare annotation was computed. [2020-08-21 15:51:19,585 INFO L268 CegarLoopResult]: For program point L61(lines 61 70) no Hoare annotation was computed. [2020-08-21 15:51:19,585 INFO L268 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-08-21 15:51:19,586 INFO L268 CegarLoopResult]: For program point L57-2(line 57) no Hoare annotation was computed. [2020-08-21 15:51:19,586 INFO L264 CegarLoopResult]: At program point L66(line 66) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-08-21 15:51:19,586 INFO L268 CegarLoopResult]: For program point L66-1(line 66) no Hoare annotation was computed. [2020-08-21 15:51:19,586 INFO L268 CegarLoopResult]: For program point parse_expression_listFINAL(lines 47 75) no Hoare annotation was computed. [2020-08-21 15:51:19,586 INFO L268 CegarLoopResult]: For program point L62(lines 62 64) no Hoare annotation was computed. [2020-08-21 15:51:19,587 INFO L264 CegarLoopResult]: At program point parse_expression_listENTRY(lines 47 75) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-21 15:51:19,587 INFO L268 CegarLoopResult]: For program point L54(lines 54 72) no Hoare annotation was computed. [2020-08-21 15:51:19,587 INFO L268 CegarLoopResult]: For program point parse_expression_listEXIT(lines 47 75) no Hoare annotation was computed. [2020-08-21 15:51:19,587 INFO L268 CegarLoopResult]: For program point L59-1(line 59) no Hoare annotation was computed. [2020-08-21 15:51:19,587 INFO L268 CegarLoopResult]: For program point L59-2(line 59) no Hoare annotation was computed. [2020-08-21 15:51:19,588 INFO L268 CegarLoopResult]: For program point L55(line 55) no Hoare annotation was computed. [2020-08-21 15:51:19,588 INFO L268 CegarLoopResult]: For program point L59-4(line 59) no Hoare annotation was computed. [2020-08-21 15:51:19,588 INFO L268 CegarLoopResult]: For program point L59-6(line 59) no Hoare annotation was computed. [2020-08-21 15:51:19,588 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-08-21 15:51:19,588 INFO L271 CegarLoopResult]: At program point L59-8(line 59) the Hoare annotation is: true [2020-08-21 15:51:19,588 INFO L268 CegarLoopResult]: For program point L59-9(line 59) no Hoare annotation was computed. [2020-08-21 15:51:19,589 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 15:51:19,589 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|)) [2020-08-21 15:51:19,589 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 15:51:19,589 INFO L268 CegarLoopResult]: For program point r_strncpyFINAL(line 31) no Hoare annotation was computed. [2020-08-21 15:51:19,590 INFO L268 CegarLoopResult]: For program point r_strncpyEXIT(line 31) no Hoare annotation was computed. [2020-08-21 15:51:19,590 INFO L271 CegarLoopResult]: At program point r_strncpyENTRY(line 31) the Hoare annotation is: true [2020-08-21 15:51:19,590 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 15:51:19,590 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 15:51:19,590 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 15:51:19,590 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 15:51:19,591 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 76 85) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-21 15:51:19,591 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 76 85) no Hoare annotation was computed. [2020-08-21 15:51:19,591 INFO L271 CegarLoopResult]: At program point L83(line 83) the Hoare annotation is: true [2020-08-21 15:51:19,591 INFO L268 CegarLoopResult]: For program point L83-1(line 83) no Hoare annotation was computed. [2020-08-21 15:51:19,591 INFO L268 CegarLoopResult]: For program point L79-2(lines 79 81) no Hoare annotation was computed. [2020-08-21 15:51:19,592 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 76 85) no Hoare annotation was computed. [2020-08-21 15:51:19,592 INFO L271 CegarLoopResult]: At program point L79-3(lines 79 81) the Hoare annotation is: true [2020-08-21 15:51:19,592 INFO L268 CegarLoopResult]: For program point L79-4(lines 79 81) no Hoare annotation was computed. [2020-08-21 15:51:19,592 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-21 15:51:19,592 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-21 15:51:19,593 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 15:51:19,593 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-21 15:51:19,593 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-21 15:51:19,594 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-21 15:51:19,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:51:19 BoogieIcfgContainer [2020-08-21 15:51:19,609 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:51:19,612 INFO L168 Benchmark]: Toolchain (without parser) took 5380.22 ms. Allocated memory was 141.0 MB in the beginning and 275.3 MB in the end (delta: 134.2 MB). Free memory was 103.9 MB in the beginning and 100.0 MB in the end (delta: 3.9 MB). Peak memory consumption was 138.1 MB. Max. memory is 7.1 GB. [2020-08-21 15:51:19,613 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 15:51:19,614 INFO L168 Benchmark]: CACSL2BoogieTranslator took 365.54 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.7 MB in the beginning and 180.0 MB in the end (delta: -76.3 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2020-08-21 15:51:19,615 INFO L168 Benchmark]: Boogie Preprocessor took 51.64 ms. Allocated memory is still 203.9 MB. Free memory was 180.0 MB in the beginning and 177.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2020-08-21 15:51:19,616 INFO L168 Benchmark]: RCFGBuilder took 515.96 ms. Allocated memory is still 203.9 MB. Free memory was 177.9 MB in the beginning and 149.4 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. [2020-08-21 15:51:19,617 INFO L168 Benchmark]: TraceAbstraction took 4442.24 ms. Allocated memory was 203.9 MB in the beginning and 275.3 MB in the end (delta: 71.3 MB). Free memory was 148.8 MB in the beginning and 100.0 MB in the end (delta: 48.8 MB). Peak memory consumption was 120.1 MB. Max. memory is 7.1 GB. [2020-08-21 15:51:19,621 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 365.54 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.7 MB in the beginning and 180.0 MB in the end (delta: -76.3 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 51.64 ms. Allocated memory is still 203.9 MB. Free memory was 180.0 MB in the beginning and 177.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 515.96 ms. Allocated memory is still 203.9 MB. Free memory was 177.9 MB in the beginning and 149.4 MB in the end (delta: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4442.24 ms. Allocated memory was 203.9 MB in the beginning and 275.3 MB in the end (delta: 71.3 MB). Free memory was 148.8 MB in the beginning and 100.0 MB in the end (delta: 48.8 MB). Peak memory consumption was 120.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 79]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 14, TraceHistogramMax: 8, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, 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, 0.6s 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, 1.0s 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...