/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:46:09,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:46:09,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:46:09,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:46:09,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:46:10,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:46:10,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:46:10,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:46:10,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:46:10,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:46:10,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:46:10,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:46:10,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:46:10,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:46:10,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:46:10,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:46:10,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:46:10,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:46:10,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:46:10,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:46:10,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:46:10,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:46:10,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:46:10,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:46:10,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:46:10,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:46:10,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:46:10,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:46:10,066 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:46:10,085 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:46:10,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:46:10,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:46:10,087 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:46:10,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:46:10,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:46:10,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:46:10,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:46:10,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:46:10,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:46:10,090 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:46:10,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:46:10,090 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:46:10,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:46:10,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:46:10,091 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:46:10,091 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:46:10,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:46:10,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:46:10,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:46:10,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:46:10,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:46:10,092 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:46:10,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:46:10,389 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:46:10,393 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:46:10,394 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:46:10,395 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:46:10,395 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-22 19:46:10,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b1925fec/b877586e585c418f8c42083e53e6cdc2/FLAGa586e8aa4 [2020-08-22 19:46:10,967 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:46:10,968 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-22 19:46:10,974 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b1925fec/b877586e585c418f8c42083e53e6cdc2/FLAGa586e8aa4 [2020-08-22 19:46:11,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b1925fec/b877586e585c418f8c42083e53e6cdc2 [2020-08-22 19:46:11,334 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:46:11,338 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:46:11,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:11,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:46:11,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:46:11,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:11" (1/1) ... [2020-08-22 19:46:11,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dbf90b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:11, skipping insertion in model container [2020-08-22 19:46:11,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:11" (1/1) ... [2020-08-22 19:46:11,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:46:11,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:46:11,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:11,678 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:46:11,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:11,820 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:46:11,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:11 WrapperNode [2020-08-22 19:46:11,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:11,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:46:11,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:46:11,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:46:11,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:11" (1/1) ... [2020-08-22 19:46:11,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:11" (1/1) ... [2020-08-22 19:46:11,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:11" (1/1) ... [2020-08-22 19:46:11,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:11" (1/1) ... [2020-08-22 19:46:11,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:11" (1/1) ... [2020-08-22 19:46:11,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:11" (1/1) ... [2020-08-22 19:46:11,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:11" (1/1) ... [2020-08-22 19:46:11,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:46:11,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:46:11,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:46:11,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:46:11,881 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:46:11,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:46:11,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:46:11,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:46:11,943 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-08-22 19:46:11,943 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-08-22 19:46:11,944 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:46:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:46:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:46:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-08-22 19:46:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-08-22 19:46:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-08-22 19:46:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-08-22 19:46:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-08-22 19:46:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-08-22 19:46:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-08-22 19:46:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-08-22 19:46:11,945 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-08-22 19:46:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-08-22 19:46:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-22 19:46:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-08-22 19:46:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-08-22 19:46:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-08-22 19:46:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-08-22 19:46:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-08-22 19:46:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-08-22 19:46:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-08-22 19:46:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-08-22 19:46:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-08-22 19:46:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-08-22 19:46:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-08-22 19:46:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-08-22 19:46:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-08-22 19:46:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-08-22 19:46:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-08-22 19:46:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:46:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:46:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:46:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:46:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:46:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:46:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:46:12,402 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:46:12,402 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 19:46:12,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:12 BoogieIcfgContainer [2020-08-22 19:46:12,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:46:12,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:46:12,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:46:12,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:46:12,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:46:11" (1/3) ... [2020-08-22 19:46:12,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce04b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:12, skipping insertion in model container [2020-08-22 19:46:12,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:11" (2/3) ... [2020-08-22 19:46:12,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce04b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:12, skipping insertion in model container [2020-08-22 19:46:12,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:12" (3/3) ... [2020-08-22 19:46:12,421 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-08-22 19:46:12,432 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:46:12,440 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:46:12,454 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:46:12,476 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:46:12,476 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:46:12,477 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:46:12,477 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:46:12,477 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:46:12,477 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:46:12,477 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:46:12,478 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:46:12,498 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2020-08-22 19:46:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 19:46:12,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:12,514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:12,515 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:12,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:12,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2116113079, now seen corresponding path program 1 times [2020-08-22 19:46:12,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:12,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703856347] [2020-08-22 19:46:12,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:12,596 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:12,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:12,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 19:46:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:12,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703856347] [2020-08-22 19:46:12,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:12,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:46:12,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341614226] [2020-08-22 19:46:12,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:46:12,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:12,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:46:12,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:46:12,881 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 3 states. [2020-08-22 19:46:13,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:13,199 INFO L93 Difference]: Finished difference Result 227 states and 257 transitions. [2020-08-22 19:46:13,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:46:13,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-08-22 19:46:13,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:13,212 INFO L225 Difference]: With dead ends: 227 [2020-08-22 19:46:13,213 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 19:46:13,218 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 [2020-08-22 19:46:13,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 19:46:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-08-22 19:46:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-22 19:46:13,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-08-22 19:46:13,278 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 48 [2020-08-22 19:46:13,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:13,279 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-08-22 19:46:13,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:46:13,279 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-08-22 19:46:13,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 19:46:13,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:13,282 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:13,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:46:13,283 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:13,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:13,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1227098254, now seen corresponding path program 1 times [2020-08-22 19:46:13,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:13,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850523013] [2020-08-22 19:46:13,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:13,289 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:13,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:13,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 19:46:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:13,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850523013] [2020-08-22 19:46:13,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:13,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:46:13,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046598483] [2020-08-22 19:46:13,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:46:13,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:13,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:46:13,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:13,431 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 4 states. [2020-08-22 19:46:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:13,660 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2020-08-22 19:46:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:46:13,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-08-22 19:46:13,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:13,663 INFO L225 Difference]: With dead ends: 189 [2020-08-22 19:46:13,663 INFO L226 Difference]: Without dead ends: 103 [2020-08-22 19:46:13,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-08-22 19:46:13,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-08-22 19:46:13,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-22 19:46:13,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2020-08-22 19:46:13,684 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 60 [2020-08-22 19:46:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:13,685 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2020-08-22 19:46:13,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:46:13,685 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2020-08-22 19:46:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 19:46:13,687 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:13,688 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:13,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:46:13,688 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:13,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1578191403, now seen corresponding path program 1 times [2020-08-22 19:46:13,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:13,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090629626] [2020-08-22 19:46:13,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:13,692 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:13,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:13,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 19:46:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:13,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090629626] [2020-08-22 19:46:13,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:13,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:46:13,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074886126] [2020-08-22 19:46:13,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:46:13,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:13,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:46:13,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:46:13,871 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand 8 states. [2020-08-22 19:46:14,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:14,345 INFO L93 Difference]: Finished difference Result 365 states and 410 transitions. [2020-08-22 19:46:14,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:46:14,346 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-22 19:46:14,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:14,352 INFO L225 Difference]: With dead ends: 365 [2020-08-22 19:46:14,352 INFO L226 Difference]: Without dead ends: 275 [2020-08-22 19:46:14,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-08-22 19:46:14,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-08-22 19:46:14,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 140. [2020-08-22 19:46:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 19:46:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 157 transitions. [2020-08-22 19:46:14,389 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 157 transitions. Word has length 62 [2020-08-22 19:46:14,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:14,392 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 157 transitions. [2020-08-22 19:46:14,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:46:14,393 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 157 transitions. [2020-08-22 19:46:14,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 19:46:14,399 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:14,399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:14,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:46:14,399 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:14,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1116699365, now seen corresponding path program 1 times [2020-08-22 19:46:14,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:14,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216207566] [2020-08-22 19:46:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:14,403 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:14,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:14,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 19:46:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:14,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216207566] [2020-08-22 19:46:14,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:14,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:46:14,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277033869] [2020-08-22 19:46:14,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:46:14,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:14,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:46:14,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:46:14,628 INFO L87 Difference]: Start difference. First operand 140 states and 157 transitions. Second operand 10 states. [2020-08-22 19:46:15,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:15,175 INFO L93 Difference]: Finished difference Result 430 states and 486 transitions. [2020-08-22 19:46:15,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 19:46:15,176 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-08-22 19:46:15,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:15,179 INFO L225 Difference]: With dead ends: 430 [2020-08-22 19:46:15,179 INFO L226 Difference]: Without dead ends: 340 [2020-08-22 19:46:15,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-08-22 19:46:15,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-08-22 19:46:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 144. [2020-08-22 19:46:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-22 19:46:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 161 transitions. [2020-08-22 19:46:15,202 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 161 transitions. Word has length 65 [2020-08-22 19:46:15,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:15,203 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 161 transitions. [2020-08-22 19:46:15,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:46:15,203 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 161 transitions. [2020-08-22 19:46:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 19:46:15,204 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:15,205 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:15,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:46:15,205 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:15,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:15,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1492663361, now seen corresponding path program 1 times [2020-08-22 19:46:15,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:15,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802567588] [2020-08-22 19:46:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:15,208 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:15,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:15,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 19:46:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:15,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802567588] [2020-08-22 19:46:15,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:15,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:46:15,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439946523] [2020-08-22 19:46:15,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:46:15,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:15,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:46:15,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:15,287 INFO L87 Difference]: Start difference. First operand 144 states and 161 transitions. Second operand 4 states. [2020-08-22 19:46:15,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:15,508 INFO L93 Difference]: Finished difference Result 233 states and 260 transitions. [2020-08-22 19:46:15,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:46:15,509 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-08-22 19:46:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:15,510 INFO L225 Difference]: With dead ends: 233 [2020-08-22 19:46:15,510 INFO L226 Difference]: Without dead ends: 145 [2020-08-22 19:46:15,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:15,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-08-22 19:46:15,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-08-22 19:46:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-08-22 19:46:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2020-08-22 19:46:15,545 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 65 [2020-08-22 19:46:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:15,545 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2020-08-22 19:46:15,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:46:15,546 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2020-08-22 19:46:15,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 19:46:15,548 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:15,548 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:15,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:46:15,548 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:15,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:15,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1492389340, now seen corresponding path program 1 times [2020-08-22 19:46:15,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:15,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399677074] [2020-08-22 19:46:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:15,552 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:15,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:15,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 19:46:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:15,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399677074] [2020-08-22 19:46:15,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:15,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:46:15,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160646112] [2020-08-22 19:46:15,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:46:15,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:15,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:46:15,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:46:15,692 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand 10 states. [2020-08-22 19:46:16,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:16,213 INFO L93 Difference]: Finished difference Result 388 states and 434 transitions. [2020-08-22 19:46:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 19:46:16,214 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-08-22 19:46:16,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:16,216 INFO L225 Difference]: With dead ends: 388 [2020-08-22 19:46:16,216 INFO L226 Difference]: Without dead ends: 285 [2020-08-22 19:46:16,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-08-22 19:46:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-08-22 19:46:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 155. [2020-08-22 19:46:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-22 19:46:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 173 transitions. [2020-08-22 19:46:16,233 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 173 transitions. Word has length 67 [2020-08-22 19:46:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:16,234 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 173 transitions. [2020-08-22 19:46:16,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:46:16,234 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 173 transitions. [2020-08-22 19:46:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-22 19:46:16,235 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:16,235 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:16,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:46:16,236 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:16,236 INFO L82 PathProgramCache]: Analyzing trace with hash 122758570, now seen corresponding path program 1 times [2020-08-22 19:46:16,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:16,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955631519] [2020-08-22 19:46:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:16,239 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:16,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:16,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 19:46:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:16,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955631519] [2020-08-22 19:46:16,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:16,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:46:16,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447998498] [2020-08-22 19:46:16,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:46:16,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:16,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:46:16,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:46:16,393 INFO L87 Difference]: Start difference. First operand 155 states and 173 transitions. Second operand 12 states. [2020-08-22 19:46:17,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:17,044 INFO L93 Difference]: Finished difference Result 425 states and 477 transitions. [2020-08-22 19:46:17,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 19:46:17,045 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-08-22 19:46:17,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:17,047 INFO L225 Difference]: With dead ends: 425 [2020-08-22 19:46:17,047 INFO L226 Difference]: Without dead ends: 322 [2020-08-22 19:46:17,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-08-22 19:46:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-08-22 19:46:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 136. [2020-08-22 19:46:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-22 19:46:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 151 transitions. [2020-08-22 19:46:17,068 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 151 transitions. Word has length 70 [2020-08-22 19:46:17,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:17,069 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 151 transitions. [2020-08-22 19:46:17,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:46:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 151 transitions. [2020-08-22 19:46:17,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 19:46:17,071 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:17,071 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:17,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:46:17,072 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:17,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:17,072 INFO L82 PathProgramCache]: Analyzing trace with hash -272178825, now seen corresponding path program 1 times [2020-08-22 19:46:17,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:17,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781096391] [2020-08-22 19:46:17,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:17,095 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:17,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:17,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 19:46:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:17,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781096391] [2020-08-22 19:46:17,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:17,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:46:17,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117719304] [2020-08-22 19:46:17,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:46:17,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:17,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:46:17,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:17,136 INFO L87 Difference]: Start difference. First operand 136 states and 151 transitions. Second operand 4 states. [2020-08-22 19:46:17,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:17,327 INFO L93 Difference]: Finished difference Result 226 states and 251 transitions. [2020-08-22 19:46:17,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:46:17,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-08-22 19:46:17,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:17,329 INFO L225 Difference]: With dead ends: 226 [2020-08-22 19:46:17,329 INFO L226 Difference]: Without dead ends: 137 [2020-08-22 19:46:17,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-22 19:46:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-08-22 19:46:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 19:46:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2020-08-22 19:46:17,350 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 72 [2020-08-22 19:46:17,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:17,351 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2020-08-22 19:46:17,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:46:17,351 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2020-08-22 19:46:17,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 19:46:17,352 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:17,352 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:17,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:46:17,353 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:17,353 INFO L82 PathProgramCache]: Analyzing trace with hash 588909148, now seen corresponding path program 1 times [2020-08-22 19:46:17,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:17,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265613514] [2020-08-22 19:46:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:17,369 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:17,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:17,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 19:46:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:17,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265613514] [2020-08-22 19:46:17,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:17,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:46:17,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363100403] [2020-08-22 19:46:17,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:46:17,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:17,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:46:17,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:46:17,541 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand 10 states. [2020-08-22 19:46:18,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:18,203 INFO L93 Difference]: Finished difference Result 389 states and 436 transitions. [2020-08-22 19:46:18,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 19:46:18,204 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-08-22 19:46:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:18,206 INFO L225 Difference]: With dead ends: 389 [2020-08-22 19:46:18,206 INFO L226 Difference]: Without dead ends: 296 [2020-08-22 19:46:18,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-08-22 19:46:18,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-08-22 19:46:18,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 200. [2020-08-22 19:46:18,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-22 19:46:18,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 223 transitions. [2020-08-22 19:46:18,223 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 223 transitions. Word has length 72 [2020-08-22 19:46:18,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:18,224 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 223 transitions. [2020-08-22 19:46:18,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:46:18,224 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 223 transitions. [2020-08-22 19:46:18,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 19:46:18,225 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:18,225 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:18,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 19:46:18,226 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:18,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:18,226 INFO L82 PathProgramCache]: Analyzing trace with hash 69190993, now seen corresponding path program 1 times [2020-08-22 19:46:18,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:18,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455037359] [2020-08-22 19:46:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:18,243 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:18,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:18,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 19:46:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:18,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:18,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455037359] [2020-08-22 19:46:18,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:18,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:46:18,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010776054] [2020-08-22 19:46:18,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:46:18,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:18,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:46:18,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:46:18,384 INFO L87 Difference]: Start difference. First operand 200 states and 223 transitions. Second operand 8 states. [2020-08-22 19:46:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:18,766 INFO L93 Difference]: Finished difference Result 288 states and 323 transitions. [2020-08-22 19:46:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:46:18,767 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-08-22 19:46:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:18,770 INFO L225 Difference]: With dead ends: 288 [2020-08-22 19:46:18,770 INFO L226 Difference]: Without dead ends: 286 [2020-08-22 19:46:18,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:46:18,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-22 19:46:18,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 254. [2020-08-22 19:46:18,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-08-22 19:46:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 285 transitions. [2020-08-22 19:46:18,793 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 285 transitions. Word has length 73 [2020-08-22 19:46:18,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:18,794 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 285 transitions. [2020-08-22 19:46:18,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:46:18,794 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 285 transitions. [2020-08-22 19:46:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 19:46:18,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:18,797 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:18,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 19:46:18,798 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:18,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1474625812, now seen corresponding path program 1 times [2020-08-22 19:46:18,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:18,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462766563] [2020-08-22 19:46:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:18,807 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:18,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:18,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 19:46:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:18,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462766563] [2020-08-22 19:46:18,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:18,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:46:18,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438770586] [2020-08-22 19:46:18,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:46:18,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:18,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:46:18,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:46:18,952 INFO L87 Difference]: Start difference. First operand 254 states and 285 transitions. Second operand 12 states. [2020-08-22 19:46:19,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:19,654 INFO L93 Difference]: Finished difference Result 460 states and 517 transitions. [2020-08-22 19:46:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 19:46:19,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-22 19:46:19,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:19,660 INFO L225 Difference]: With dead ends: 460 [2020-08-22 19:46:19,660 INFO L226 Difference]: Without dead ends: 367 [2020-08-22 19:46:19,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-08-22 19:46:19,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-08-22 19:46:19,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 258. [2020-08-22 19:46:19,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-08-22 19:46:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 289 transitions. [2020-08-22 19:46:19,686 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 289 transitions. Word has length 75 [2020-08-22 19:46:19,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:19,691 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 289 transitions. [2020-08-22 19:46:19,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:46:19,691 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 289 transitions. [2020-08-22 19:46:19,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-22 19:46:19,693 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:19,693 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:19,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 19:46:19,693 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:19,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:19,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1908172287, now seen corresponding path program 1 times [2020-08-22 19:46:19,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:19,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102398741] [2020-08-22 19:46:19,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:19,703 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:19,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:19,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 19:46:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:19,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102398741] [2020-08-22 19:46:19,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:19,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:46:19,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100608933] [2020-08-22 19:46:19,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:46:19,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:19,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:46:19,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:46:19,777 INFO L87 Difference]: Start difference. First operand 258 states and 289 transitions. Second operand 8 states. [2020-08-22 19:46:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:20,251 INFO L93 Difference]: Finished difference Result 432 states and 485 transitions. [2020-08-22 19:46:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 19:46:20,251 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-08-22 19:46:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:20,253 INFO L225 Difference]: With dead ends: 432 [2020-08-22 19:46:20,254 INFO L226 Difference]: Without dead ends: 339 [2020-08-22 19:46:20,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-08-22 19:46:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-08-22 19:46:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 258. [2020-08-22 19:46:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-08-22 19:46:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 289 transitions. [2020-08-22 19:46:20,280 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 289 transitions. Word has length 76 [2020-08-22 19:46:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:20,280 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 289 transitions. [2020-08-22 19:46:20,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:46:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 289 transitions. [2020-08-22 19:46:20,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-22 19:46:20,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:20,282 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:20,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 19:46:20,282 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:20,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:20,283 INFO L82 PathProgramCache]: Analyzing trace with hash 116425250, now seen corresponding path program 1 times [2020-08-22 19:46:20,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:20,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431163159] [2020-08-22 19:46:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:20,293 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:20,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:20,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 19:46:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:20,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431163159] [2020-08-22 19:46:20,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:20,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:46:20,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670660244] [2020-08-22 19:46:20,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:46:20,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:20,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:46:20,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:46:20,358 INFO L87 Difference]: Start difference. First operand 258 states and 289 transitions. Second operand 5 states. [2020-08-22 19:46:20,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:20,567 INFO L93 Difference]: Finished difference Result 360 states and 403 transitions. [2020-08-22 19:46:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:46:20,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-08-22 19:46:20,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:20,570 INFO L225 Difference]: With dead ends: 360 [2020-08-22 19:46:20,570 INFO L226 Difference]: Without dead ends: 271 [2020-08-22 19:46:20,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:46:20,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-08-22 19:46:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 260. [2020-08-22 19:46:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-22 19:46:20,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 291 transitions. [2020-08-22 19:46:20,595 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 291 transitions. Word has length 76 [2020-08-22 19:46:20,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:20,596 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 291 transitions. [2020-08-22 19:46:20,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:46:20,596 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 291 transitions. [2020-08-22 19:46:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 19:46:20,598 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:20,599 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:20,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 19:46:20,599 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:20,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:20,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1122457453, now seen corresponding path program 1 times [2020-08-22 19:46:20,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:20,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133488659] [2020-08-22 19:46:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:20,617 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:20,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:20,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 19:46:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:20,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133488659] [2020-08-22 19:46:20,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:20,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:46:20,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481030686] [2020-08-22 19:46:20,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:46:20,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:20,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:46:20,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:46:20,715 INFO L87 Difference]: Start difference. First operand 260 states and 291 transitions. Second operand 6 states. [2020-08-22 19:46:20,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:20,947 INFO L93 Difference]: Finished difference Result 411 states and 459 transitions. [2020-08-22 19:46:20,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 19:46:20,948 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-08-22 19:46:20,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:20,951 INFO L225 Difference]: With dead ends: 411 [2020-08-22 19:46:20,951 INFO L226 Difference]: Without dead ends: 297 [2020-08-22 19:46:20,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:46:20,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-08-22 19:46:20,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 253. [2020-08-22 19:46:20,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-22 19:46:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 281 transitions. [2020-08-22 19:46:20,975 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 281 transitions. Word has length 77 [2020-08-22 19:46:20,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:20,975 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 281 transitions. [2020-08-22 19:46:20,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:46:20,975 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 281 transitions. [2020-08-22 19:46:20,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 19:46:20,977 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:20,977 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:20,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 19:46:20,978 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:20,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:20,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2031617893, now seen corresponding path program 1 times [2020-08-22 19:46:20,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:20,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2008320944] [2020-08-22 19:46:20,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:20,986 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:21,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:21,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 19:46:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:21,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2008320944] [2020-08-22 19:46:21,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:21,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:46:21,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289346394] [2020-08-22 19:46:21,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:46:21,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:21,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:46:21,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:46:21,078 INFO L87 Difference]: Start difference. First operand 253 states and 281 transitions. Second operand 8 states. [2020-08-22 19:46:21,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:21,487 INFO L93 Difference]: Finished difference Result 521 states and 577 transitions. [2020-08-22 19:46:21,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:46:21,488 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-08-22 19:46:21,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:21,491 INFO L225 Difference]: With dead ends: 521 [2020-08-22 19:46:21,491 INFO L226 Difference]: Without dead ends: 331 [2020-08-22 19:46:21,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-22 19:46:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-08-22 19:46:21,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 264. [2020-08-22 19:46:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-22 19:46:21,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 292 transitions. [2020-08-22 19:46:21,519 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 292 transitions. Word has length 78 [2020-08-22 19:46:21,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:21,520 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 292 transitions. [2020-08-22 19:46:21,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:46:21,520 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 292 transitions. [2020-08-22 19:46:21,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 19:46:21,522 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:21,523 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:21,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 19:46:21,523 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:21,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:21,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1446971750, now seen corresponding path program 1 times [2020-08-22 19:46:21,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:21,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111210694] [2020-08-22 19:46:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:21,532 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:21,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:21,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 19:46:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:21,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111210694] [2020-08-22 19:46:21,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:21,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:46:21,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184197379] [2020-08-22 19:46:21,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:46:21,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:21,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:46:21,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:46:21,663 INFO L87 Difference]: Start difference. First operand 264 states and 292 transitions. Second operand 10 states. [2020-08-22 19:46:22,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:22,215 INFO L93 Difference]: Finished difference Result 599 states and 665 transitions. [2020-08-22 19:46:22,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 19:46:22,215 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-08-22 19:46:22,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:22,221 INFO L225 Difference]: With dead ends: 599 [2020-08-22 19:46:22,221 INFO L226 Difference]: Without dead ends: 435 [2020-08-22 19:46:22,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-08-22 19:46:22,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-08-22 19:46:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 355. [2020-08-22 19:46:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-08-22 19:46:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 393 transitions. [2020-08-22 19:46:22,258 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 393 transitions. Word has length 79 [2020-08-22 19:46:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:22,259 INFO L479 AbstractCegarLoop]: Abstraction has 355 states and 393 transitions. [2020-08-22 19:46:22,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:46:22,259 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 393 transitions. [2020-08-22 19:46:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-22 19:46:22,260 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:22,261 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:22,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 19:46:22,261 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:22,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:22,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1140392269, now seen corresponding path program 2 times [2020-08-22 19:46:22,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:22,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675916558] [2020-08-22 19:46:22,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:22,269 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:22,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:22,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 19:46:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:22,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675916558] [2020-08-22 19:46:22,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:22,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:46:22,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657545035] [2020-08-22 19:46:22,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:46:22,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:22,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:46:22,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:46:22,439 INFO L87 Difference]: Start difference. First operand 355 states and 393 transitions. Second operand 12 states. [2020-08-22 19:46:23,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:23,186 INFO L93 Difference]: Finished difference Result 694 states and 770 transitions. [2020-08-22 19:46:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 19:46:23,186 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-22 19:46:23,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:23,189 INFO L225 Difference]: With dead ends: 694 [2020-08-22 19:46:23,190 INFO L226 Difference]: Without dead ends: 525 [2020-08-22 19:46:23,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-08-22 19:46:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-08-22 19:46:23,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 390. [2020-08-22 19:46:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-08-22 19:46:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 432 transitions. [2020-08-22 19:46:23,230 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 432 transitions. Word has length 82 [2020-08-22 19:46:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:23,230 INFO L479 AbstractCegarLoop]: Abstraction has 390 states and 432 transitions. [2020-08-22 19:46:23,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:46:23,231 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 432 transitions. [2020-08-22 19:46:23,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 19:46:23,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:23,232 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:23,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 19:46:23,233 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:23,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:23,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1836590973, now seen corresponding path program 2 times [2020-08-22 19:46:23,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:23,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786279795] [2020-08-22 19:46:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:23,240 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:23,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:23,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 19:46:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:23,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786279795] [2020-08-22 19:46:23,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:23,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:46:23,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198592919] [2020-08-22 19:46:23,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:46:23,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:23,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:46:23,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:46:23,424 INFO L87 Difference]: Start difference. First operand 390 states and 432 transitions. Second operand 14 states. [2020-08-22 19:46:24,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:24,426 INFO L93 Difference]: Finished difference Result 680 states and 754 transitions. [2020-08-22 19:46:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 19:46:24,426 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 85 [2020-08-22 19:46:24,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:24,429 INFO L225 Difference]: With dead ends: 680 [2020-08-22 19:46:24,429 INFO L226 Difference]: Without dead ends: 428 [2020-08-22 19:46:24,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2020-08-22 19:46:24,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-08-22 19:46:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 247. [2020-08-22 19:46:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-08-22 19:46:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 270 transitions. [2020-08-22 19:46:24,452 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 270 transitions. Word has length 85 [2020-08-22 19:46:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:24,453 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 270 transitions. [2020-08-22 19:46:24,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:46:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 270 transitions. [2020-08-22 19:46:24,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-22 19:46:24,454 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:24,454 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:24,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 19:46:24,455 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:24,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1723821108, now seen corresponding path program 2 times [2020-08-22 19:46:24,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:24,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287818179] [2020-08-22 19:46:24,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:24,461 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:24,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:24,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 19:46:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:24,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287818179] [2020-08-22 19:46:24,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:24,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:46:24,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939843412] [2020-08-22 19:46:24,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:46:24,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:24,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:46:24,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:46:24,519 INFO L87 Difference]: Start difference. First operand 247 states and 270 transitions. Second operand 6 states. [2020-08-22 19:46:24,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:24,830 INFO L93 Difference]: Finished difference Result 387 states and 425 transitions. [2020-08-22 19:46:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:46:24,831 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2020-08-22 19:46:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:24,834 INFO L225 Difference]: With dead ends: 387 [2020-08-22 19:46:24,834 INFO L226 Difference]: Without dead ends: 290 [2020-08-22 19:46:24,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:46:24,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-08-22 19:46:24,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 247. [2020-08-22 19:46:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-08-22 19:46:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 269 transitions. [2020-08-22 19:46:24,858 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 269 transitions. Word has length 90 [2020-08-22 19:46:24,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:24,858 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 269 transitions. [2020-08-22 19:46:24,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:46:24,859 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 269 transitions. [2020-08-22 19:46:24,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 19:46:24,860 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:24,861 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:24,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 19:46:24,861 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:24,862 INFO L82 PathProgramCache]: Analyzing trace with hash 888855281, now seen corresponding path program 1 times [2020-08-22 19:46:24,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:24,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730069950] [2020-08-22 19:46:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:24,869 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:46:24,896 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:46:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:46:24,913 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:46:24,971 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 19:46:24,972 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 19:46:24,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 19:46:25,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:46:25 BoogieIcfgContainer [2020-08-22 19:46:25,006 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:46:25,010 INFO L168 Benchmark]: Toolchain (without parser) took 13670.71 ms. Allocated memory was 139.5 MB in the beginning and 361.8 MB in the end (delta: 222.3 MB). Free memory was 103.2 MB in the beginning and 304.8 MB in the end (delta: -201.6 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:25,015 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-22 19:46:25,017 INFO L168 Benchmark]: CACSL2BoogieTranslator took 480.29 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 103.2 MB in the beginning and 180.7 MB in the end (delta: -77.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:25,018 INFO L168 Benchmark]: Boogie Preprocessor took 57.01 ms. Allocated memory is still 203.4 MB. Free memory was 179.8 MB in the beginning and 177.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:25,018 INFO L168 Benchmark]: RCFGBuilder took 532.00 ms. Allocated memory is still 203.4 MB. Free memory was 177.9 MB in the beginning and 145.6 MB in the end (delta: 32.3 MB). Peak memory consumption was 32.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:25,019 INFO L168 Benchmark]: TraceAbstraction took 12593.43 ms. Allocated memory was 203.4 MB in the beginning and 361.8 MB in the end (delta: 158.3 MB). Free memory was 144.6 MB in the beginning and 304.8 MB in the end (delta: -160.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 19:46:25,027 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 480.29 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 103.2 MB in the beginning and 180.7 MB in the end (delta: -77.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 57.01 ms. Allocated memory is still 203.4 MB. Free memory was 179.8 MB in the beginning and 177.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 532.00 ms. Allocated memory is still 203.4 MB. Free memory was 177.9 MB in the beginning and 145.6 MB in the end (delta: 32.3 MB). Peak memory consumption was 32.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12593.43 ms. Allocated memory was 203.4 MB in the beginning and 361.8 MB in the end (delta: 158.3 MB). Free memory was 144.6 MB in the beginning and 304.8 MB in the end (delta: -160.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L74] char A [2 + 2 + 4 +1]; [L75] A[2 + 2 + 4] = 0 [L76] CALL parse_expression_list (A) [L48] int start=0, i=-1, j=-1; [L49] char str2[2]; [L50] COND FALSE !(!str) [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L69] EXPR str[i] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L56] EXPR str[start] [L56] COND FALSE !(str[start] == '"') [L57] j = i-1 [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L59] (0 < j) && (str[j] == '"') [L59] EXPR str[j] [L59] (0 < j) && (str[j] == '"') [L59] COND FALSE !((0 < j) && (str[j] == '"')) [L60] COND TRUE start<=j [L61] CALL r_strncpy(str2, str+start, j-start+1) [L30] return strncpy(dest,src,n); [L61] RET r_strncpy(str2, str+start, j-start+1) [L62] CALL __VERIFIER_assert(j - start + 1 < 2) [L3] COND TRUE !(cond) [L4] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 123 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.4s, OverallIterations: 20, TraceHistogramMax: 3, AutomataDifference: 8.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2561 SDtfs, 3629 SDslu, 9359 SDs, 0 SdLazy, 6198 SolverSat, 281 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 323 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=390occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 19 MinimizatonAttempts, 1526 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 incorrect! Received shutdown request...