/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 produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --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-eb0fd7c [2020-09-21 12:35:41,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:35:41,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:35:41,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:35:41,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:35:41,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:35:41,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:35:41,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:35:41,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:35:41,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:35:41,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:35:41,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:35:41,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:35:41,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:35:41,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:35:41,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:35:41,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:35:41,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:35:41,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:35:41,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:35:41,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:35:41,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:35:41,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:35:41,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:35:41,938 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:35:41,938 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:35:41,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:35:41,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:35:41,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:35:41,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:35:41,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:35:41,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:35:41,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:35:41,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:35:41,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:35:41,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:35:41,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:35:41,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:35:41,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:35:41,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:35:41,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:35:41,956 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 [2020-09-21 12:35:42,024 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:35:42,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:35:42,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:35:42,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:35:42,027 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:35:42,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:35:42,027 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:35:42,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:35:42,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:35:42,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:35:42,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:35:42,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:35:42,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:35:42,032 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:35:42,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:35:42,032 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:35:42,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:35:42,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:35:42,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:35:42,033 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:35:42,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:35:42,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:35:42,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:35:42,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:35:42,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:35:42,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:35:42,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:35:42,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:35:42,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:35:42,035 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:35:42,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:35:42,590 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:35:42,595 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:35:42,596 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:35:42,597 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:35:42,598 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-09-21 12:35:42,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/327c5d422/ae37700a2ac846deafbaf594c93914f1/FLAGbb8bc36fd [2020-09-21 12:35:43,271 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:35:43,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-09-21 12:35:43,281 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/327c5d422/ae37700a2ac846deafbaf594c93914f1/FLAGbb8bc36fd [2020-09-21 12:35:43,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/327c5d422/ae37700a2ac846deafbaf594c93914f1 [2020-09-21 12:35:43,619 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:35:43,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:35:43,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:35:43,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:35:43,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:35:43,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:35:43" (1/1) ... [2020-09-21 12:35:43,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb81a5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:43, skipping insertion in model container [2020-09-21 12:35:43,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:35:43" (1/1) ... [2020-09-21 12:35:43,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:35:43,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:35:43,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:35:43,961 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:35:44,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:35:44,112 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:35:44,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:44 WrapperNode [2020-09-21 12:35:44,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:35:44,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:35:44,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:35:44,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:35:44,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:44" (1/1) ... [2020-09-21 12:35:44,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:44" (1/1) ... [2020-09-21 12:35:44,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:44" (1/1) ... [2020-09-21 12:35:44,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:44" (1/1) ... [2020-09-21 12:35:44,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:44" (1/1) ... [2020-09-21 12:35:44,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:44" (1/1) ... [2020-09-21 12:35:44,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:44" (1/1) ... [2020-09-21 12:35:44,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:35:44,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:35:44,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:35:44,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:35:44,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:44" (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 [2020-09-21 12:35:44,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:35:44,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:35:44,263 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:35:44,263 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-09-21 12:35:44,264 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-09-21 12:35:44,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:35:44,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:35:44,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 12:35:44,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:35:44,266 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-09-21 12:35:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-09-21 12:35:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-09-21 12:35:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-09-21 12:35:44,267 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-09-21 12:35:44,268 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-09-21 12:35:44,269 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-09-21 12:35:44,270 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-09-21 12:35:44,270 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-09-21 12:35:44,270 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-09-21 12:35:44,270 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-09-21 12:35:44,271 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-09-21 12:35:44,271 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-09-21 12:35:44,271 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-09-21 12:35:44,272 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-09-21 12:35:44,273 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-09-21 12:35:44,274 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-09-21 12:35:44,274 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-09-21 12:35:44,275 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-09-21 12:35:44,275 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-09-21 12:35:44,275 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-09-21 12:35:44,276 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-09-21 12:35:44,276 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-09-21 12:35:44,276 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-09-21 12:35:44,276 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-09-21 12:35:44,276 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-09-21 12:35:44,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 12:35:44,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:35:44,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 12:35:44,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 12:35:44,277 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:35:44,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:35:44,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:35:44,717 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:35:44,717 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-21 12:35:44,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:35:44 BoogieIcfgContainer [2020-09-21 12:35:44,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:35:44,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:35:44,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:35:44,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:35:44,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:35:43" (1/3) ... [2020-09-21 12:35:44,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252b16c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:35:44, skipping insertion in model container [2020-09-21 12:35:44,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:35:44" (2/3) ... [2020-09-21 12:35:44,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252b16c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:35:44, skipping insertion in model container [2020-09-21 12:35:44,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:35:44" (3/3) ... [2020-09-21 12:35:44,733 INFO L109 eAbstractionObserver]: Analyzing ICFG veris.c_OpenSER_cases1_stripFullBoth_arr.i [2020-09-21 12:35:44,746 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:35:44,756 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:35:44,779 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:35:44,811 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:35:44,812 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:35:44,812 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:35:44,812 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:35:44,812 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:35:44,812 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:35:44,812 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:35:44,813 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:35:44,835 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-09-21 12:35:44,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 12:35:44,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:44,845 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] [2020-09-21 12:35:44,846 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:44,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1663477819, now seen corresponding path program 1 times [2020-09-21 12:35:44,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:44,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713462789] [2020-09-21 12:35:44,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:45,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:45,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:45,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:45,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:45,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:45,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:46,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:46,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-21 12:35:46,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-21 12:35:46,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-09-21 12:35:46,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-21 12:35:46,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:46,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-21 12:35:46,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:46,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:46,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:46,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:46,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:46,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:35:46,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:46,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:46,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:46,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:46,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:35:46,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 12:35:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:46,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:46,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:46,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:46,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:46,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:35:46,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:46,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:46,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:35:46,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:46,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:46,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713462789] [2020-09-21 12:35:46,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:46,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:35:46,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129664215] [2020-09-21 12:35:46,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:35:46,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:46,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:35:46,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:35:46,237 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 3 states. [2020-09-21 12:35:46,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:46,456 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2020-09-21 12:35:46,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:35:46,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-09-21 12:35:46,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:46,473 INFO L225 Difference]: With dead ends: 102 [2020-09-21 12:35:46,474 INFO L226 Difference]: Without dead ends: 47 [2020-09-21 12:35:46,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:35:46,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-21 12:35:46,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-09-21 12:35:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-21 12:35:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-09-21 12:35:46,549 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 32 [2020-09-21 12:35:46,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:46,551 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-09-21 12:35:46,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:35:46,551 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-09-21 12:35:46,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 12:35:46,561 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:46,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:46,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:35:46,562 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1140955694, now seen corresponding path program 1 times [2020-09-21 12:35:46,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:46,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160988502] [2020-09-21 12:35:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:46,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:46,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:46,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:46,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:46,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:46,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:46,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:47,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:47,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:47,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:47,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-21 12:35:47,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-21 12:35:47,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-09-21 12:35:47,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:47,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:35:47,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:35:47,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 12:35:47,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:47,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:47,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:47,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:47,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:47,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:47,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:35:47,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:47,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:47,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:47,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:47,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:47,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 12:35:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:47,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:47,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:47,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:47,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:47,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:35:47,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:47,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:47,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:35:47,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:47,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:47,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160988502] [2020-09-21 12:35:47,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:47,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:35:47,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527461694] [2020-09-21 12:35:47,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:35:47,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:47,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:35:47,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:35:47,643 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 4 states. [2020-09-21 12:35:47,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:47,769 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2020-09-21 12:35:47,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:35:47,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-09-21 12:35:47,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:47,772 INFO L225 Difference]: With dead ends: 83 [2020-09-21 12:35:47,772 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 12:35:47,773 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 [2020-09-21 12:35:47,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 12:35:47,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-09-21 12:35:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-21 12:35:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-09-21 12:35:47,785 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 36 [2020-09-21 12:35:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:47,786 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-09-21 12:35:47,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:35:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-09-21 12:35:47,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 12:35:47,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:47,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:47,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:35:47,790 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:47,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:47,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1359810412, now seen corresponding path program 1 times [2020-09-21 12:35:47,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:47,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665548684] [2020-09-21 12:35:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:47,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:47,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:47,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:47,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:48,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:48,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:48,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:48,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-21 12:35:48,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-21 12:35:48,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-09-21 12:35:48,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:48,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:35:48,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:35:48,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 12:35:48,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:48,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:48,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:48,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:48,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:48,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:48,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:35:48,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:48,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:48,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:48,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:48,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:48,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 12:35:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:48,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:48,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:48,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:48,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:48,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:35:48,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:48,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:48,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:35:48,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:48,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:48,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665548684] [2020-09-21 12:35:48,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:48,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:35:48,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899479384] [2020-09-21 12:35:48,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:35:48,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:48,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:35:48,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:35:48,863 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 4 states. [2020-09-21 12:35:48,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:48,974 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-09-21 12:35:48,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:35:48,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-09-21 12:35:48,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:48,976 INFO L225 Difference]: With dead ends: 90 [2020-09-21 12:35:48,976 INFO L226 Difference]: Without dead ends: 50 [2020-09-21 12:35:48,977 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 [2020-09-21 12:35:48,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-21 12:35:48,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-09-21 12:35:48,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-21 12:35:48,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-09-21 12:35:48,985 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 36 [2020-09-21 12:35:48,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:48,985 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-09-21 12:35:48,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:35:48,985 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-09-21 12:35:48,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 12:35:48,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:48,987 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] [2020-09-21 12:35:48,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:35:48,987 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:48,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:48,988 INFO L82 PathProgramCache]: Analyzing trace with hash 446687854, now seen corresponding path program 1 times [2020-09-21 12:35:48,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:48,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956806659] [2020-09-21 12:35:48,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:49,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:49,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:49,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:49,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:49,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:49,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:49,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:50,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:50,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-21 12:35:50,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-21 12:35:50,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-09-21 12:35:50,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:50,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:35:50,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:35:50,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:35:50,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:50,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:50,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:50,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:50,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:50,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:50,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:35:50,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:50,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:50,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:50,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:50,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:50,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 12:35:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:50,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:50,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:50,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:50,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:50,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:35:50,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:35:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:50,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:50,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956806659] [2020-09-21 12:35:50,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:50,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 12:35:50,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448080744] [2020-09-21 12:35:50,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:35:50,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:50,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:35:50,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:35:50,102 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 5 states. [2020-09-21 12:35:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:50,289 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-09-21 12:35:50,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:35:50,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-09-21 12:35:50,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:50,292 INFO L225 Difference]: With dead ends: 92 [2020-09-21 12:35:50,292 INFO L226 Difference]: Without dead ends: 52 [2020-09-21 12:35:50,293 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 [2020-09-21 12:35:50,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-21 12:35:50,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-09-21 12:35:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-21 12:35:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-09-21 12:35:50,316 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 38 [2020-09-21 12:35:50,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:50,317 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-09-21 12:35:50,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:35:50,317 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-09-21 12:35:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 12:35:50,319 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:50,319 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] [2020-09-21 12:35:50,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:35:50,320 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:50,321 INFO L82 PathProgramCache]: Analyzing trace with hash -890762000, now seen corresponding path program 2 times [2020-09-21 12:35:50,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:50,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723083586] [2020-09-21 12:35:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:50,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:50,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:50,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:50,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:50,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:50,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:51,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:51,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-21 12:35:51,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-21 12:35:51,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:35:51,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:51,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:35:51,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:35:51,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:35:51,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:51,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:51,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:51,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:51,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:51,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:51,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:35:51,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:51,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:51,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:51,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:51,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:51,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 12:35:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:51,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:51,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:51,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:51,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:51,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:35:51,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:51,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:51,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:35:51,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:51,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:51,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723083586] [2020-09-21 12:35:51,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:51,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 12:35:51,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008893003] [2020-09-21 12:35:51,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:35:51,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:51,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:35:51,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:35:51,425 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 6 states. [2020-09-21 12:35:51,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:51,565 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-09-21 12:35:51,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:35:51,565 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-09-21 12:35:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:51,567 INFO L225 Difference]: With dead ends: 94 [2020-09-21 12:35:51,568 INFO L226 Difference]: Without dead ends: 54 [2020-09-21 12:35:51,569 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 [2020-09-21 12:35:51,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-21 12:35:51,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-09-21 12:35:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-21 12:35:51,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2020-09-21 12:35:51,580 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 40 [2020-09-21 12:35:51,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:51,580 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2020-09-21 12:35:51,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:35:51,580 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2020-09-21 12:35:51,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-21 12:35:51,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:51,582 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] [2020-09-21 12:35:51,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:35:51,583 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:51,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:51,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1984850190, now seen corresponding path program 3 times [2020-09-21 12:35:51,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:51,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217184479] [2020-09-21 12:35:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:51,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:51,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:51,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:51,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:51,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:52,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:52,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:52,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:52,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-21 12:35:52,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-21 12:35:52,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-09-21 12:35:52,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:52,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:35:52,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-21 12:35:52,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:35:52,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:52,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:52,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:52,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:52,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:52,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:52,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:52,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:52,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:52,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:52,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:52,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:52,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 12:35:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:52,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:52,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:52,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:52,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:52,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:35:52,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:52,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:52,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:35:52,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:52,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-21 12:35:52,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217184479] [2020-09-21 12:35:52,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:52,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:35:52,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186924554] [2020-09-21 12:35:52,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:35:52,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:52,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:35:52,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:35:52,673 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 6 states. [2020-09-21 12:35:52,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:52,874 INFO L93 Difference]: Finished difference Result 117 states and 148 transitions. [2020-09-21 12:35:52,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:35:52,875 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-09-21 12:35:52,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:52,878 INFO L225 Difference]: With dead ends: 117 [2020-09-21 12:35:52,878 INFO L226 Difference]: Without dead ends: 81 [2020-09-21 12:35:52,879 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 [2020-09-21 12:35:52,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-21 12:35:52,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 61. [2020-09-21 12:35:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-21 12:35:52,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-09-21 12:35:52,893 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 42 [2020-09-21 12:35:52,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:52,893 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-09-21 12:35:52,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:35:52,894 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-09-21 12:35:52,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-21 12:35:52,895 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:52,895 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] [2020-09-21 12:35:52,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:35:52,895 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:52,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:52,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1723311092, now seen corresponding path program 1 times [2020-09-21 12:35:52,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:52,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259709332] [2020-09-21 12:35:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:52,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:52,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:53,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:53,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:53,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:53,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:53,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:53,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:53,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-21 12:35:53,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-21 12:35:53,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-09-21 12:35:53,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:53,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:35:53,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 12:35:53,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:35:53,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:53,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:53,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:53,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:53,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:53,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:53,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:35:53,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:53,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:53,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:53,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:53,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:53,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 12:35:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:53,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:53,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:53,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:53,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:53,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:35:53,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:53,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:53,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:35:53,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:53,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:35:53,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259709332] [2020-09-21 12:35:53,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:53,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:35:53,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023492466] [2020-09-21 12:35:53,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:35:53,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:53,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:35:53,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:35:53,992 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-09-21 12:35:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:54,113 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2020-09-21 12:35:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:35:54,114 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-09-21 12:35:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:54,115 INFO L225 Difference]: With dead ends: 112 [2020-09-21 12:35:54,115 INFO L226 Difference]: Without dead ends: 64 [2020-09-21 12:35:54,116 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 [2020-09-21 12:35:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-21 12:35:54,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-09-21 12:35:54,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-21 12:35:54,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-09-21 12:35:54,122 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 42 [2020-09-21 12:35:54,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:54,123 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-09-21 12:35:54,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:35:54,123 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-09-21 12:35:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 12:35:54,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:54,124 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] [2020-09-21 12:35:54,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:35:54,125 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:54,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:54,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1723419274, now seen corresponding path program 2 times [2020-09-21 12:35:54,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:54,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631024519] [2020-09-21 12:35:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:54,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:54,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:54,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:54,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:54,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:54,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:54,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:55,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:55,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-21 12:35:55,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-21 12:35:55,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 999 [2020-09-21 12:35:55,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:55,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:35:55,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-21 12:35:55,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 12:35:55,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:55,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:55,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:55,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:55,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:55,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:55,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:55,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:55,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:55,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:55,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:55,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:55,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 12:35:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:55,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:55,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:55,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:55,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:55,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:35:55,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:55,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:55,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:35:55,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:55,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 12:35:55,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631024519] [2020-09-21 12:35:55,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:55,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 12:35:55,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709088125] [2020-09-21 12:35:55,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:35:55,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:55,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:35:55,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:35:55,249 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 7 states. [2020-09-21 12:35:55,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:55,616 INFO L93 Difference]: Finished difference Result 174 states and 226 transitions. [2020-09-21 12:35:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:35:55,617 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-09-21 12:35:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:55,620 INFO L225 Difference]: With dead ends: 174 [2020-09-21 12:35:55,620 INFO L226 Difference]: Without dead ends: 121 [2020-09-21 12:35:55,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:35:55,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-21 12:35:55,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 85. [2020-09-21 12:35:55,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-21 12:35:55,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2020-09-21 12:35:55,632 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 44 [2020-09-21 12:35:55,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:55,633 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2020-09-21 12:35:55,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:35:55,633 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2020-09-21 12:35:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 12:35:55,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:55,634 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] [2020-09-21 12:35:55,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:35:55,635 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:55,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:55,635 INFO L82 PathProgramCache]: Analyzing trace with hash 882604280, now seen corresponding path program 1 times [2020-09-21 12:35:55,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:55,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395960822] [2020-09-21 12:35:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:55,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:55,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:56,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:56,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:56,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:56,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:56,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:56,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:56,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-21 12:35:56,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-21 12:35:56,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-09-21 12:35:56,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:56,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:35:56,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-21 12:35:56,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 12:35:56,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:56,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:56,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:56,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:56,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:56,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:56,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:56,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:56,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:56,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:56,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:56,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:56,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 12:35:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:56,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:56,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:56,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:56,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:56,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:35:56,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:56,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:56,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:35:56,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:56,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 12:35:56,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395960822] [2020-09-21 12:35:56,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:56,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:35:56,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261300075] [2020-09-21 12:35:56,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:35:56,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:56,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:35:56,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:35:56,733 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand 6 states. [2020-09-21 12:35:56,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:56,993 INFO L93 Difference]: Finished difference Result 212 states and 278 transitions. [2020-09-21 12:35:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:35:56,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-09-21 12:35:56,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:56,995 INFO L225 Difference]: With dead ends: 212 [2020-09-21 12:35:56,995 INFO L226 Difference]: Without dead ends: 101 [2020-09-21 12:35:56,996 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 [2020-09-21 12:35:56,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-21 12:35:57,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2020-09-21 12:35:57,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-21 12:35:57,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2020-09-21 12:35:57,004 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 44 [2020-09-21 12:35:57,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:57,004 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2020-09-21 12:35:57,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:35:57,005 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2020-09-21 12:35:57,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-21 12:35:57,006 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:57,006 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:57,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:35:57,006 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:57,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:57,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1705682887, now seen corresponding path program 1 times [2020-09-21 12:35:57,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:57,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671781378] [2020-09-21 12:35:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:57,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:57,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:57,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:57,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:57,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:57,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:57,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:58,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:58,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-21 12:35:58,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-21 12:35:58,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1016 [2020-09-21 12:35:58,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:58,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:35:58,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-09-21 12:35:58,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:35:58,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:58,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:58,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:58,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:58,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:58,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:58,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:35:58,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:58,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:58,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:58,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:58,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:58,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 12:35:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:58,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:58,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:58,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:58,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:58,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:35:58,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:58,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:35:58,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:58,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:35:58,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:58,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 12:35:58,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671781378] [2020-09-21 12:35:58,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:35:58,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:35:58,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918831139] [2020-09-21 12:35:58,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:35:58,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:58,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:35:58,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:35:58,164 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand 6 states. [2020-09-21 12:35:58,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:58,353 INFO L93 Difference]: Finished difference Result 93 states and 115 transitions. [2020-09-21 12:35:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:35:58,354 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-09-21 12:35:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:58,355 INFO L225 Difference]: With dead ends: 93 [2020-09-21 12:35:58,355 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 12:35:58,356 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 [2020-09-21 12:35:58,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 12:35:58,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 12:35:58,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 12:35:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 12:35:58,359 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2020-09-21 12:35:58,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:58,359 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 12:35:58,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:35:58,360 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 12:35:58,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 12:35:58,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:35:58,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 12:35:58,534 INFO L268 CegarLoopResult]: For program point L60(line 60) no Hoare annotation was computed. [2020-09-21 12:35:58,535 INFO L268 CegarLoopResult]: For program point L60-2(line 60) no Hoare annotation was computed. [2020-09-21 12:35:58,535 INFO L268 CegarLoopResult]: For program point L60-4(lines 54 72) no Hoare annotation was computed. [2020-09-21 12:35:58,535 INFO L268 CegarLoopResult]: For program point L56-1(line 56) no Hoare annotation was computed. [2020-09-21 12:35:58,535 INFO L268 CegarLoopResult]: For program point L56-3(line 56) no Hoare annotation was computed. [2020-09-21 12:35:58,535 INFO L271 CegarLoopResult]: At program point L56-5(line 56) the Hoare annotation is: true [2020-09-21 12:35:58,536 INFO L268 CegarLoopResult]: For program point L52-1(lines 52 73) no Hoare annotation was computed. [2020-09-21 12:35:58,536 INFO L268 CegarLoopResult]: For program point L56-6(line 56) no Hoare annotation was computed. [2020-09-21 12:35:58,536 INFO L268 CegarLoopResult]: For program point L52-2(lines 52 73) no Hoare annotation was computed. [2020-09-21 12:35:58,536 INFO L271 CegarLoopResult]: At program point L52-4(lines 52 73) the Hoare annotation is: true [2020-09-21 12:35:58,536 INFO L268 CegarLoopResult]: For program point L52-5(lines 52 73) no Hoare annotation was computed. [2020-09-21 12:35:58,536 INFO L264 CegarLoopResult]: At program point L65(line 65) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-09-21 12:35:58,537 INFO L268 CegarLoopResult]: For program point L65-1(line 65) no Hoare annotation was computed. [2020-09-21 12:35:58,538 INFO L268 CegarLoopResult]: For program point L61(lines 61 70) no Hoare annotation was computed. [2020-09-21 12:35:58,538 INFO L268 CegarLoopResult]: For program point L57(line 57) no Hoare annotation was computed. [2020-09-21 12:35:58,538 INFO L268 CegarLoopResult]: For program point L57-2(line 57) no Hoare annotation was computed. [2020-09-21 12:35:58,538 INFO L264 CegarLoopResult]: At program point L66(line 66) the Hoare annotation is: (< parse_expression_list_~j~0 (+ parse_expression_list_~start~0 1)) [2020-09-21 12:35:58,539 INFO L268 CegarLoopResult]: For program point L66-1(line 66) no Hoare annotation was computed. [2020-09-21 12:35:58,539 INFO L268 CegarLoopResult]: For program point parse_expression_listFINAL(lines 47 75) no Hoare annotation was computed. [2020-09-21 12:35:58,539 INFO L268 CegarLoopResult]: For program point L62(lines 62 64) no Hoare annotation was computed. [2020-09-21 12:35:58,539 INFO L264 CegarLoopResult]: At program point parse_expression_listENTRY(lines 47 75) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-21 12:35:58,539 INFO L268 CegarLoopResult]: For program point L54(lines 54 72) no Hoare annotation was computed. [2020-09-21 12:35:58,539 INFO L268 CegarLoopResult]: For program point parse_expression_listEXIT(lines 47 75) no Hoare annotation was computed. [2020-09-21 12:35:58,539 INFO L268 CegarLoopResult]: For program point L59-1(line 59) no Hoare annotation was computed. [2020-09-21 12:35:58,540 INFO L268 CegarLoopResult]: For program point L59-2(line 59) no Hoare annotation was computed. [2020-09-21 12:35:58,540 INFO L268 CegarLoopResult]: For program point L55(line 55) no Hoare annotation was computed. [2020-09-21 12:35:58,540 INFO L268 CegarLoopResult]: For program point L59-4(line 59) no Hoare annotation was computed. [2020-09-21 12:35:58,540 INFO L268 CegarLoopResult]: For program point L59-6(line 59) no Hoare annotation was computed. [2020-09-21 12:35:58,540 INFO L268 CegarLoopResult]: For program point L51(line 51) no Hoare annotation was computed. [2020-09-21 12:35:58,540 INFO L271 CegarLoopResult]: At program point L59-8(line 59) the Hoare annotation is: true [2020-09-21 12:35:58,540 INFO L268 CegarLoopResult]: For program point L59-9(line 59) no Hoare annotation was computed. [2020-09-21 12:35:58,541 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:35:58,541 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|)) [2020-09-21 12:35:58,541 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:35:58,541 INFO L268 CegarLoopResult]: For program point r_strncpyFINAL(line 31) no Hoare annotation was computed. [2020-09-21 12:35:58,541 INFO L268 CegarLoopResult]: For program point r_strncpyEXIT(line 31) no Hoare annotation was computed. [2020-09-21 12:35:58,541 INFO L271 CegarLoopResult]: At program point r_strncpyENTRY(line 31) the Hoare annotation is: true [2020-09-21 12:35:58,541 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:35:58,542 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 12:35:58,542 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 12:35:58,542 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:35:58,542 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 76 85) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-21 12:35:58,543 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 76 85) no Hoare annotation was computed. [2020-09-21 12:35:58,543 INFO L271 CegarLoopResult]: At program point L83(line 83) the Hoare annotation is: true [2020-09-21 12:35:58,543 INFO L268 CegarLoopResult]: For program point L83-1(line 83) no Hoare annotation was computed. [2020-09-21 12:35:58,543 INFO L268 CegarLoopResult]: For program point L79-2(lines 79 81) no Hoare annotation was computed. [2020-09-21 12:35:58,543 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 76 85) no Hoare annotation was computed. [2020-09-21 12:35:58,544 INFO L271 CegarLoopResult]: At program point L79-3(lines 79 81) the Hoare annotation is: true [2020-09-21 12:35:58,544 INFO L268 CegarLoopResult]: For program point L79-4(lines 79 81) no Hoare annotation was computed. [2020-09-21 12:35:58,544 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-21 12:35:58,544 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-21 12:35:58,544 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-21 12:35:58,544 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-21 12:35:58,545 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-21 12:35:58,545 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-21 12:35:58,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:35:58 BoogieIcfgContainer [2020-09-21 12:35:58,562 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:35:58,568 INFO L168 Benchmark]: Toolchain (without parser) took 14943.97 ms. Allocated memory was 146.3 MB in the beginning and 347.1 MB in the end (delta: 200.8 MB). Free memory was 101.9 MB in the beginning and 124.2 MB in the end (delta: -22.3 MB). Peak memory consumption was 178.5 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:58,569 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 12:35:58,572 INFO L168 Benchmark]: CACSL2BoogieTranslator took 487.38 ms. Allocated memory was 146.3 MB in the beginning and 201.3 MB in the end (delta: 55.1 MB). Free memory was 101.2 MB in the beginning and 177.9 MB in the end (delta: -76.6 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:58,580 INFO L168 Benchmark]: Boogie Preprocessor took 62.78 ms. Allocated memory is still 201.3 MB. Free memory was 177.9 MB in the beginning and 175.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:58,582 INFO L168 Benchmark]: RCFGBuilder took 546.18 ms. Allocated memory is still 201.3 MB. Free memory was 175.2 MB in the beginning and 146.3 MB in the end (delta: 28.9 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:58,583 INFO L168 Benchmark]: TraceAbstraction took 13838.32 ms. Allocated memory was 201.3 MB in the beginning and 347.1 MB in the end (delta: 145.8 MB). Free memory was 145.6 MB in the beginning and 124.2 MB in the end (delta: 21.4 MB). Peak memory consumption was 167.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:58,591 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 487.38 ms. Allocated memory was 146.3 MB in the beginning and 201.3 MB in the end (delta: 55.1 MB). Free memory was 101.2 MB in the beginning and 177.9 MB in the end (delta: -76.6 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 62.78 ms. Allocated memory is still 201.3 MB. Free memory was 177.9 MB in the beginning and 175.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 546.18 ms. Allocated memory is still 201.3 MB. Free memory was 175.2 MB in the beginning and 146.3 MB in the end (delta: 28.9 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13838.32 ms. Allocated memory was 201.3 MB in the beginning and 347.1 MB in the end (delta: 145.8 MB). Free memory was 145.6 MB in the beginning and 124.2 MB in the end (delta: 21.4 MB). Peak memory consumption was 167.2 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: 13.5s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 521 SDtfs, 343 SDslu, 866 SDs, 0 SdLazy, 972 SolverSat, 102 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 69 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 62 PreInvPairs, 89 NumberOfFragments, 35 HoareAnnotationTreeSize, 62 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 14 FomulaSimplificationsInter, 40 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 10.9s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 393 ConstructedInterpolants, 0 QuantifiedInterpolants, 25987 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 59/73 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...