/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 0.1.25-86f66a4 [2020-07-07 13:59:19,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:59:19,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:59:19,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:59:19,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:59:19,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:59:19,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:59:19,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:59:19,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:59:19,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:59:19,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:59:19,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:59:19,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:59:19,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:59:19,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:59:19,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:59:19,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:59:19,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:59:19,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:59:19,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:59:19,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:59:19,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:59:19,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:59:19,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:59:19,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:59:19,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 13:59:19,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 13:59:19,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 13:59:19,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 13:59:19,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 13:59:19,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 13:59:19,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 13:59:19,390 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 13:59:19,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:59:19,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:59:19,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:59:19,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:59:19,401 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:59:19,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:59:19,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:59:19,402 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:59:19,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:59:19,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:59:19,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:59:19,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:59:19,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:59:19,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:59:19,404 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:59:19,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:59:19,404 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:59:19,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:59:19,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:59:19,405 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:59:19,405 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:59:19,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:59:19,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:59:19,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:59:19,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:59:19,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:59:19,406 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:59:19,688 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:59:19,706 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:59:19,709 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:59:19,710 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:59:19,710 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:59:19,711 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-07 13:59:19,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7f4ab753/b52d4f28fe804e089fff351ab0590e20/FLAG302efbda1 [2020-07-07 13:59:20,280 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:59:20,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-07 13:59:20,288 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7f4ab753/b52d4f28fe804e089fff351ab0590e20/FLAG302efbda1 [2020-07-07 13:59:20,630 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7f4ab753/b52d4f28fe804e089fff351ab0590e20 [2020-07-07 13:59:20,641 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:59:20,643 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:59:20,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:59:20,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:59:20,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:59:20,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:59:20" (1/1) ... [2020-07-07 13:59:20,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bbc0375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:20, skipping insertion in model container [2020-07-07 13:59:20,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:59:20" (1/1) ... [2020-07-07 13:59:20,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:59:20,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:59:20,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:59:20,904 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:59:21,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:59:21,051 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:59:21,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:21 WrapperNode [2020-07-07 13:59:21,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:59:21,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:59:21,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:59:21,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:59:21,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:21" (1/1) ... [2020-07-07 13:59:21,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:21" (1/1) ... [2020-07-07 13:59:21,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:21" (1/1) ... [2020-07-07 13:59:21,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:21" (1/1) ... [2020-07-07 13:59:21,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:21" (1/1) ... [2020-07-07 13:59:21,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:21" (1/1) ... [2020-07-07 13:59:21,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:21" (1/1) ... [2020-07-07 13:59:21,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:59:21,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:59:21,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:59:21,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:59:21,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:59:21,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:59:21,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:59:21,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 13:59:21,165 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-07-07 13:59:21,165 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-07-07 13:59:21,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:59:21,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:59:21,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 13:59:21,166 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-07-07 13:59:21,166 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-07-07 13:59:21,166 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-07-07 13:59:21,168 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-07-07 13:59:21,168 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-07-07 13:59:21,168 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-07-07 13:59:21,168 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-07-07 13:59:21,168 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-07-07 13:59:21,168 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-07-07 13:59:21,169 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-07-07 13:59:21,169 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-07-07 13:59:21,169 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-07-07 13:59:21,170 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-07-07 13:59:21,170 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-07-07 13:59:21,172 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-07-07 13:59:21,172 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-07-07 13:59:21,172 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-07-07 13:59:21,173 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-07-07 13:59:21,173 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-07-07 13:59:21,173 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-07-07 13:59:21,173 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-07-07 13:59:21,173 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-07-07 13:59:21,173 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-07-07 13:59:21,173 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-07-07 13:59:21,174 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-07-07 13:59:21,174 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-07-07 13:59:21,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:59:21,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:59:21,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:59:21,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:59:21,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:59:21,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:59:21,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:59:21,625 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:59:21,626 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-07 13:59:21,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:59:21 BoogieIcfgContainer [2020-07-07 13:59:21,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:59:21,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:59:21,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:59:21,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:59:21,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:59:20" (1/3) ... [2020-07-07 13:59:21,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af64d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:59:21, skipping insertion in model container [2020-07-07 13:59:21,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:21" (2/3) ... [2020-07-07 13:59:21,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af64d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:59:21, skipping insertion in model container [2020-07-07 13:59:21,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:59:21" (3/3) ... [2020-07-07 13:59:21,646 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-07 13:59:21,654 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:59:21,662 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:59:21,677 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:59:21,697 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:59:21,697 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:59:21,697 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:59:21,697 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:59:21,698 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:59:21,698 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:59:21,698 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:59:21,698 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:59:21,719 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2020-07-07 13:59:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-07 13:59:21,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:21,735 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] [2020-07-07 13:59:21,735 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:21,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:21,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2116113079, now seen corresponding path program 1 times [2020-07-07 13:59:21,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:21,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434209328] [2020-07-07 13:59:21,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:22,006 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:22,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434209328] [2020-07-07 13:59:22,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:22,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:59:22,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866392970] [2020-07-07 13:59:22,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:59:22,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:22,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:59:22,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:59:22,035 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 3 states. [2020-07-07 13:59:22,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:22,379 INFO L93 Difference]: Finished difference Result 227 states and 257 transitions. [2020-07-07 13:59:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:59:22,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-07-07 13:59:22,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:22,392 INFO L225 Difference]: With dead ends: 227 [2020-07-07 13:59:22,392 INFO L226 Difference]: Without dead ends: 102 [2020-07-07 13:59:22,397 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 [2020-07-07 13:59:22,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-07 13:59:22,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-07-07 13:59:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-07 13:59:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-07-07 13:59:22,466 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 48 [2020-07-07 13:59:22,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:22,467 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-07-07 13:59:22,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:59:22,468 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-07-07 13:59:22,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-07 13:59:22,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:22,489 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] [2020-07-07 13:59:22,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:59:22,490 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:22,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:22,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1227098254, now seen corresponding path program 1 times [2020-07-07 13:59:22,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:22,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441955407] [2020-07-07 13:59:22,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:22,643 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:22,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441955407] [2020-07-07 13:59:22,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:22,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:59:22,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454758330] [2020-07-07 13:59:22,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:59:22,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:22,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:59:22,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:59:22,647 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 4 states. [2020-07-07 13:59:22,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:22,849 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2020-07-07 13:59:22,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:59:22,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-07-07 13:59:22,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:22,852 INFO L225 Difference]: With dead ends: 189 [2020-07-07 13:59:22,852 INFO L226 Difference]: Without dead ends: 103 [2020-07-07 13:59:22,854 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 [2020-07-07 13:59:22,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-07 13:59:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-07-07 13:59:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-07 13:59:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2020-07-07 13:59:22,872 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 60 [2020-07-07 13:59:22,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:22,873 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2020-07-07 13:59:22,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:59:22,873 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2020-07-07 13:59:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-07 13:59:22,876 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:22,876 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] [2020-07-07 13:59:22,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:59:22,876 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:22,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:22,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1578191403, now seen corresponding path program 1 times [2020-07-07 13:59:22,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:22,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535646536] [2020-07-07 13:59:22,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:23,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:23,034 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:23,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535646536] [2020-07-07 13:59:23,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:23,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 13:59:23,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146386866] [2020-07-07 13:59:23,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 13:59:23,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:23,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 13:59:23,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:59:23,037 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand 8 states. [2020-07-07 13:59:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:23,495 INFO L93 Difference]: Finished difference Result 365 states and 410 transitions. [2020-07-07 13:59:23,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 13:59:23,497 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-07-07 13:59:23,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:23,511 INFO L225 Difference]: With dead ends: 365 [2020-07-07 13:59:23,511 INFO L226 Difference]: Without dead ends: 275 [2020-07-07 13:59:23,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-07-07 13:59:23,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-07-07 13:59:23,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 140. [2020-07-07 13:59:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-07 13:59:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 157 transitions. [2020-07-07 13:59:23,568 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 157 transitions. Word has length 62 [2020-07-07 13:59:23,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:23,570 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 157 transitions. [2020-07-07 13:59:23,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 13:59:23,570 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 157 transitions. [2020-07-07 13:59:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-07 13:59:23,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:23,581 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] [2020-07-07 13:59:23,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:59:23,582 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:23,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:23,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1116699365, now seen corresponding path program 1 times [2020-07-07 13:59:23,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:23,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246863428] [2020-07-07 13:59:23,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:23,820 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:23,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246863428] [2020-07-07 13:59:23,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:23,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 13:59:23,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279763180] [2020-07-07 13:59:23,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 13:59:23,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:23,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 13:59:23,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:59:23,822 INFO L87 Difference]: Start difference. First operand 140 states and 157 transitions. Second operand 10 states. [2020-07-07 13:59:24,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:24,363 INFO L93 Difference]: Finished difference Result 430 states and 486 transitions. [2020-07-07 13:59:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 13:59:24,364 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-07-07 13:59:24,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:24,366 INFO L225 Difference]: With dead ends: 430 [2020-07-07 13:59:24,367 INFO L226 Difference]: Without dead ends: 340 [2020-07-07 13:59:24,368 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 [2020-07-07 13:59:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-07-07 13:59:24,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 144. [2020-07-07 13:59:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-07 13:59:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 161 transitions. [2020-07-07 13:59:24,389 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 161 transitions. Word has length 65 [2020-07-07 13:59:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:24,389 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 161 transitions. [2020-07-07 13:59:24,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 13:59:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 161 transitions. [2020-07-07 13:59:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-07 13:59:24,391 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:24,391 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] [2020-07-07 13:59:24,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:59:24,392 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:24,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1492663361, now seen corresponding path program 1 times [2020-07-07 13:59:24,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:24,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478454368] [2020-07-07 13:59:24,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:24,454 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:24,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478454368] [2020-07-07 13:59:24,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:24,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:59:24,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541090995] [2020-07-07 13:59:24,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:59:24,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:24,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:59:24,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:59:24,457 INFO L87 Difference]: Start difference. First operand 144 states and 161 transitions. Second operand 4 states. [2020-07-07 13:59:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:24,631 INFO L93 Difference]: Finished difference Result 233 states and 260 transitions. [2020-07-07 13:59:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:59:24,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-07-07 13:59:24,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:24,634 INFO L225 Difference]: With dead ends: 233 [2020-07-07 13:59:24,634 INFO L226 Difference]: Without dead ends: 145 [2020-07-07 13:59:24,635 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 [2020-07-07 13:59:24,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-07-07 13:59:24,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-07-07 13:59:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-07-07 13:59:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2020-07-07 13:59:24,649 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 65 [2020-07-07 13:59:24,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:24,650 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2020-07-07 13:59:24,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:59:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2020-07-07 13:59:24,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-07 13:59:24,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:24,651 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] [2020-07-07 13:59:24,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 13:59:24,652 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:24,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1492389340, now seen corresponding path program 1 times [2020-07-07 13:59:24,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:24,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322643319] [2020-07-07 13:59:24,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:24,807 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:24,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322643319] [2020-07-07 13:59:24,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:24,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 13:59:24,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732315744] [2020-07-07 13:59:24,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 13:59:24,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:24,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 13:59:24,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:59:24,811 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand 10 states. [2020-07-07 13:59:25,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:25,315 INFO L93 Difference]: Finished difference Result 388 states and 434 transitions. [2020-07-07 13:59:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 13:59:25,316 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-07-07 13:59:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:25,318 INFO L225 Difference]: With dead ends: 388 [2020-07-07 13:59:25,318 INFO L226 Difference]: Without dead ends: 285 [2020-07-07 13:59:25,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-07-07 13:59:25,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-07 13:59:25,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 155. [2020-07-07 13:59:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-07-07 13:59:25,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 173 transitions. [2020-07-07 13:59:25,355 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 173 transitions. Word has length 67 [2020-07-07 13:59:25,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:25,356 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 173 transitions. [2020-07-07 13:59:25,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 13:59:25,356 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 173 transitions. [2020-07-07 13:59:25,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-07-07 13:59:25,357 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:25,357 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] [2020-07-07 13:59:25,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 13:59:25,358 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:25,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:25,358 INFO L82 PathProgramCache]: Analyzing trace with hash 122758570, now seen corresponding path program 1 times [2020-07-07 13:59:25,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:25,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082145092] [2020-07-07 13:59:25,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:25,498 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:25,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082145092] [2020-07-07 13:59:25,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:25,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 13:59:25,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208318554] [2020-07-07 13:59:25,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 13:59:25,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:25,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 13:59:25,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-07 13:59:25,501 INFO L87 Difference]: Start difference. First operand 155 states and 173 transitions. Second operand 12 states. [2020-07-07 13:59:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:26,120 INFO L93 Difference]: Finished difference Result 425 states and 477 transitions. [2020-07-07 13:59:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 13:59:26,120 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-07-07 13:59:26,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:26,124 INFO L225 Difference]: With dead ends: 425 [2020-07-07 13:59:26,124 INFO L226 Difference]: Without dead ends: 322 [2020-07-07 13:59:26,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-07-07 13:59:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-07-07 13:59:26,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 136. [2020-07-07 13:59:26,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-07 13:59:26,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 151 transitions. [2020-07-07 13:59:26,139 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 151 transitions. Word has length 70 [2020-07-07 13:59:26,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:26,140 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 151 transitions. [2020-07-07 13:59:26,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 13:59:26,140 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 151 transitions. [2020-07-07 13:59:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-07 13:59:26,144 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:26,144 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] [2020-07-07 13:59:26,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 13:59:26,145 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:26,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:26,145 INFO L82 PathProgramCache]: Analyzing trace with hash -272178825, now seen corresponding path program 1 times [2020-07-07 13:59:26,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:26,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899545459] [2020-07-07 13:59:26,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:26,226 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:26,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899545459] [2020-07-07 13:59:26,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:26,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:59:26,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796209236] [2020-07-07 13:59:26,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:59:26,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:26,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:59:26,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:59:26,229 INFO L87 Difference]: Start difference. First operand 136 states and 151 transitions. Second operand 4 states. [2020-07-07 13:59:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:26,398 INFO L93 Difference]: Finished difference Result 226 states and 251 transitions. [2020-07-07 13:59:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:59:26,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-07-07 13:59:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:26,400 INFO L225 Difference]: With dead ends: 226 [2020-07-07 13:59:26,400 INFO L226 Difference]: Without dead ends: 137 [2020-07-07 13:59:26,401 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 [2020-07-07 13:59:26,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-07 13:59:26,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-07-07 13:59:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-07 13:59:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2020-07-07 13:59:26,410 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 72 [2020-07-07 13:59:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:26,410 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2020-07-07 13:59:26,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:59:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2020-07-07 13:59:26,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-07 13:59:26,412 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:26,412 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] [2020-07-07 13:59:26,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 13:59:26,412 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:26,413 INFO L82 PathProgramCache]: Analyzing trace with hash 588909148, now seen corresponding path program 1 times [2020-07-07 13:59:26,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:26,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131885283] [2020-07-07 13:59:26,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:26,567 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:26,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131885283] [2020-07-07 13:59:26,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:26,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 13:59:26,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049019230] [2020-07-07 13:59:26,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 13:59:26,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:26,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 13:59:26,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-07 13:59:26,570 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand 11 states. [2020-07-07 13:59:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:27,143 INFO L93 Difference]: Finished difference Result 389 states and 436 transitions. [2020-07-07 13:59:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 13:59:27,143 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-07-07 13:59:27,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:27,145 INFO L225 Difference]: With dead ends: 389 [2020-07-07 13:59:27,146 INFO L226 Difference]: Without dead ends: 296 [2020-07-07 13:59:27,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-07-07 13:59:27,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-07-07 13:59:27,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 200. [2020-07-07 13:59:27,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-07 13:59:27,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 223 transitions. [2020-07-07 13:59:27,163 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 223 transitions. Word has length 72 [2020-07-07 13:59:27,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:27,163 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 223 transitions. [2020-07-07 13:59:27,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 13:59:27,164 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 223 transitions. [2020-07-07 13:59:27,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-07 13:59:27,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:27,165 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] [2020-07-07 13:59:27,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 13:59:27,165 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:27,166 INFO L82 PathProgramCache]: Analyzing trace with hash 69190993, now seen corresponding path program 1 times [2020-07-07 13:59:27,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:27,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835606082] [2020-07-07 13:59:27,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:27,280 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:27,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835606082] [2020-07-07 13:59:27,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:27,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 13:59:27,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797434857] [2020-07-07 13:59:27,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 13:59:27,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:27,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 13:59:27,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:59:27,282 INFO L87 Difference]: Start difference. First operand 200 states and 223 transitions. Second operand 8 states. [2020-07-07 13:59:27,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:27,596 INFO L93 Difference]: Finished difference Result 288 states and 323 transitions. [2020-07-07 13:59:27,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 13:59:27,597 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-07-07 13:59:27,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:27,599 INFO L225 Difference]: With dead ends: 288 [2020-07-07 13:59:27,599 INFO L226 Difference]: Without dead ends: 286 [2020-07-07 13:59:27,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-07-07 13:59:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-07-07 13:59:27,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 254. [2020-07-07 13:59:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-07-07 13:59:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 285 transitions. [2020-07-07 13:59:27,618 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 285 transitions. Word has length 73 [2020-07-07 13:59:27,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:27,619 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 285 transitions. [2020-07-07 13:59:27,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 13:59:27,619 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 285 transitions. [2020-07-07 13:59:27,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-07 13:59:27,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:27,622 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] [2020-07-07 13:59:27,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 13:59:27,623 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:27,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:27,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1474625812, now seen corresponding path program 1 times [2020-07-07 13:59:27,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:27,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011376303] [2020-07-07 13:59:27,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:27,778 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:27,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011376303] [2020-07-07 13:59:27,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:27,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 13:59:27,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494046711] [2020-07-07 13:59:27,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 13:59:27,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:27,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 13:59:27,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-07-07 13:59:27,781 INFO L87 Difference]: Start difference. First operand 254 states and 285 transitions. Second operand 13 states. [2020-07-07 13:59:28,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:28,454 INFO L93 Difference]: Finished difference Result 460 states and 517 transitions. [2020-07-07 13:59:28,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 13:59:28,455 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2020-07-07 13:59:28,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:28,459 INFO L225 Difference]: With dead ends: 460 [2020-07-07 13:59:28,459 INFO L226 Difference]: Without dead ends: 367 [2020-07-07 13:59:28,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2020-07-07 13:59:28,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-07-07 13:59:28,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 258. [2020-07-07 13:59:28,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-07-07 13:59:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 289 transitions. [2020-07-07 13:59:28,479 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 289 transitions. Word has length 75 [2020-07-07 13:59:28,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:28,480 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 289 transitions. [2020-07-07 13:59:28,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 13:59:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 289 transitions. [2020-07-07 13:59:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-07 13:59:28,481 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:28,481 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] [2020-07-07 13:59:28,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 13:59:28,482 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:28,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:28,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1908172287, now seen corresponding path program 1 times [2020-07-07 13:59:28,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:28,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067763339] [2020-07-07 13:59:28,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:28,585 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:28,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067763339] [2020-07-07 13:59:28,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:28,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 13:59:28,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566084278] [2020-07-07 13:59:28,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 13:59:28,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:28,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 13:59:28,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:59:28,591 INFO L87 Difference]: Start difference. First operand 258 states and 289 transitions. Second operand 9 states. [2020-07-07 13:59:29,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:29,130 INFO L93 Difference]: Finished difference Result 432 states and 485 transitions. [2020-07-07 13:59:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 13:59:29,131 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 76 [2020-07-07 13:59:29,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:29,133 INFO L225 Difference]: With dead ends: 432 [2020-07-07 13:59:29,134 INFO L226 Difference]: Without dead ends: 339 [2020-07-07 13:59:29,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-07-07 13:59:29,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-07-07 13:59:29,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 258. [2020-07-07 13:59:29,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-07-07 13:59:29,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 289 transitions. [2020-07-07 13:59:29,157 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 289 transitions. Word has length 76 [2020-07-07 13:59:29,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:29,158 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 289 transitions. [2020-07-07 13:59:29,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 13:59:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 289 transitions. [2020-07-07 13:59:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-07 13:59:29,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:29,159 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] [2020-07-07 13:59:29,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 13:59:29,160 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:29,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:29,160 INFO L82 PathProgramCache]: Analyzing trace with hash 116425250, now seen corresponding path program 1 times [2020-07-07 13:59:29,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:29,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344902619] [2020-07-07 13:59:29,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:29,216 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:29,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344902619] [2020-07-07 13:59:29,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:29,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 13:59:29,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375296745] [2020-07-07 13:59:29,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 13:59:29,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:29,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 13:59:29,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:59:29,218 INFO L87 Difference]: Start difference. First operand 258 states and 289 transitions. Second operand 5 states. [2020-07-07 13:59:29,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:29,395 INFO L93 Difference]: Finished difference Result 369 states and 412 transitions. [2020-07-07 13:59:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:59:29,395 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-07-07 13:59:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:29,397 INFO L225 Difference]: With dead ends: 369 [2020-07-07 13:59:29,398 INFO L226 Difference]: Without dead ends: 280 [2020-07-07 13:59:29,399 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 [2020-07-07 13:59:29,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-07-07 13:59:29,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 260. [2020-07-07 13:59:29,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-07-07 13:59:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 291 transitions. [2020-07-07 13:59:29,416 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 291 transitions. Word has length 76 [2020-07-07 13:59:29,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:29,416 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 291 transitions. [2020-07-07 13:59:29,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 13:59:29,417 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 291 transitions. [2020-07-07 13:59:29,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-07-07 13:59:29,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:29,418 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] [2020-07-07 13:59:29,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 13:59:29,418 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:29,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:29,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1122457453, now seen corresponding path program 1 times [2020-07-07 13:59:29,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:29,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895970990] [2020-07-07 13:59:29,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:29,494 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:29,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895970990] [2020-07-07 13:59:29,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:29,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:59:29,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457873816] [2020-07-07 13:59:29,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:59:29,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:29,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:59:29,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:59:29,497 INFO L87 Difference]: Start difference. First operand 260 states and 291 transitions. Second operand 6 states. [2020-07-07 13:59:29,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:29,771 INFO L93 Difference]: Finished difference Result 411 states and 459 transitions. [2020-07-07 13:59:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 13:59:29,772 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-07-07 13:59:29,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:29,775 INFO L225 Difference]: With dead ends: 411 [2020-07-07 13:59:29,776 INFO L226 Difference]: Without dead ends: 297 [2020-07-07 13:59:29,777 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 [2020-07-07 13:59:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-07-07 13:59:29,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 253. [2020-07-07 13:59:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-07-07 13:59:29,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 281 transitions. [2020-07-07 13:59:29,798 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 281 transitions. Word has length 77 [2020-07-07 13:59:29,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:29,798 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 281 transitions. [2020-07-07 13:59:29,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:59:29,799 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 281 transitions. [2020-07-07 13:59:29,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-07 13:59:29,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:29,801 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] [2020-07-07 13:59:29,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 13:59:29,802 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:29,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:29,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2031617893, now seen corresponding path program 1 times [2020-07-07 13:59:29,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:29,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443610722] [2020-07-07 13:59:29,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:29,912 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:29,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443610722] [2020-07-07 13:59:29,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:29,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 13:59:29,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722120388] [2020-07-07 13:59:29,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 13:59:29,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:29,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 13:59:29,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:59:29,916 INFO L87 Difference]: Start difference. First operand 253 states and 281 transitions. Second operand 8 states. [2020-07-07 13:59:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:30,291 INFO L93 Difference]: Finished difference Result 521 states and 577 transitions. [2020-07-07 13:59:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 13:59:30,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-07-07 13:59:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:30,294 INFO L225 Difference]: With dead ends: 521 [2020-07-07 13:59:30,294 INFO L226 Difference]: Without dead ends: 331 [2020-07-07 13:59:30,297 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 [2020-07-07 13:59:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-07-07 13:59:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 264. [2020-07-07 13:59:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-07-07 13:59:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 292 transitions. [2020-07-07 13:59:30,316 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 292 transitions. Word has length 78 [2020-07-07 13:59:30,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:30,317 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 292 transitions. [2020-07-07 13:59:30,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 13:59:30,317 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 292 transitions. [2020-07-07 13:59:30,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 13:59:30,318 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:30,319 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] [2020-07-07 13:59:30,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 13:59:30,319 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:30,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1446971750, now seen corresponding path program 1 times [2020-07-07 13:59:30,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:30,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102519260] [2020-07-07 13:59:30,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:30,416 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:30,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102519260] [2020-07-07 13:59:30,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:30,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 13:59:30,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679819710] [2020-07-07 13:59:30,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 13:59:30,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:30,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 13:59:30,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:59:30,419 INFO L87 Difference]: Start difference. First operand 264 states and 292 transitions. Second operand 10 states. [2020-07-07 13:59:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:30,995 INFO L93 Difference]: Finished difference Result 599 states and 665 transitions. [2020-07-07 13:59:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 13:59:30,996 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-07-07 13:59:30,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:31,003 INFO L225 Difference]: With dead ends: 599 [2020-07-07 13:59:31,004 INFO L226 Difference]: Without dead ends: 435 [2020-07-07 13:59:31,005 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 [2020-07-07 13:59:31,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-07-07 13:59:31,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 355. [2020-07-07 13:59:31,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-07-07 13:59:31,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 393 transitions. [2020-07-07 13:59:31,049 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 393 transitions. Word has length 79 [2020-07-07 13:59:31,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:31,049 INFO L479 AbstractCegarLoop]: Abstraction has 355 states and 393 transitions. [2020-07-07 13:59:31,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 13:59:31,050 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 393 transitions. [2020-07-07 13:59:31,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-07 13:59:31,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:31,053 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] [2020-07-07 13:59:31,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 13:59:31,053 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:31,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1140392269, now seen corresponding path program 2 times [2020-07-07 13:59:31,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:31,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552345277] [2020-07-07 13:59:31,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:31,274 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:31,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552345277] [2020-07-07 13:59:31,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:31,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 13:59:31,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762207903] [2020-07-07 13:59:31,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 13:59:31,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:31,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 13:59:31,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-07-07 13:59:31,278 INFO L87 Difference]: Start difference. First operand 355 states and 393 transitions. Second operand 13 states. [2020-07-07 13:59:31,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:31,981 INFO L93 Difference]: Finished difference Result 694 states and 770 transitions. [2020-07-07 13:59:31,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 13:59:31,982 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-07 13:59:31,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:31,986 INFO L225 Difference]: With dead ends: 694 [2020-07-07 13:59:31,987 INFO L226 Difference]: Without dead ends: 525 [2020-07-07 13:59:31,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2020-07-07 13:59:31,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-07-07 13:59:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 390. [2020-07-07 13:59:32,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-07-07 13:59:32,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 432 transitions. [2020-07-07 13:59:32,042 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 432 transitions. Word has length 82 [2020-07-07 13:59:32,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:32,042 INFO L479 AbstractCegarLoop]: Abstraction has 390 states and 432 transitions. [2020-07-07 13:59:32,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 13:59:32,042 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 432 transitions. [2020-07-07 13:59:32,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-07 13:59:32,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:32,044 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] [2020-07-07 13:59:32,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 13:59:32,045 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:32,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:32,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1836590973, now seen corresponding path program 2 times [2020-07-07 13:59:32,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:32,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405745792] [2020-07-07 13:59:32,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:32,259 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:32,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405745792] [2020-07-07 13:59:32,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:32,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-07 13:59:32,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136460242] [2020-07-07 13:59:32,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 13:59:32,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:32,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 13:59:32,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-07-07 13:59:32,268 INFO L87 Difference]: Start difference. First operand 390 states and 432 transitions. Second operand 15 states. [2020-07-07 13:59:33,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:33,243 INFO L93 Difference]: Finished difference Result 680 states and 754 transitions. [2020-07-07 13:59:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 13:59:33,244 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 85 [2020-07-07 13:59:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:33,248 INFO L225 Difference]: With dead ends: 680 [2020-07-07 13:59:33,249 INFO L226 Difference]: Without dead ends: 428 [2020-07-07 13:59:33,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2020-07-07 13:59:33,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-07-07 13:59:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 247. [2020-07-07 13:59:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-07-07 13:59:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 270 transitions. [2020-07-07 13:59:33,289 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 270 transitions. Word has length 85 [2020-07-07 13:59:33,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:33,290 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 270 transitions. [2020-07-07 13:59:33,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 13:59:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 270 transitions. [2020-07-07 13:59:33,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-07-07 13:59:33,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:33,292 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] [2020-07-07 13:59:33,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-07 13:59:33,293 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:33,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:33,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1723821108, now seen corresponding path program 2 times [2020-07-07 13:59:33,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:33,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380820149] [2020-07-07 13:59:33,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:33,385 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:33,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380820149] [2020-07-07 13:59:33,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:33,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:59:33,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512638694] [2020-07-07 13:59:33,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:59:33,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:33,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:59:33,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:59:33,388 INFO L87 Difference]: Start difference. First operand 247 states and 270 transitions. Second operand 6 states. [2020-07-07 13:59:33,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:33,773 INFO L93 Difference]: Finished difference Result 387 states and 425 transitions. [2020-07-07 13:59:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:59:33,774 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2020-07-07 13:59:33,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:33,777 INFO L225 Difference]: With dead ends: 387 [2020-07-07 13:59:33,777 INFO L226 Difference]: Without dead ends: 290 [2020-07-07 13:59:33,779 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 [2020-07-07 13:59:33,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-07-07 13:59:33,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 247. [2020-07-07 13:59:33,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-07-07 13:59:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 269 transitions. [2020-07-07 13:59:33,834 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 269 transitions. Word has length 90 [2020-07-07 13:59:33,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:33,834 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 269 transitions. [2020-07-07 13:59:33,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:59:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 269 transitions. [2020-07-07 13:59:33,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-07 13:59:33,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:33,836 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] [2020-07-07 13:59:33,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-07 13:59:33,836 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:33,837 INFO L82 PathProgramCache]: Analyzing trace with hash 888855281, now seen corresponding path program 1 times [2020-07-07 13:59:33,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:33,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892590371] [2020-07-07 13:59:33,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:59:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:59:33,964 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:33,965 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-07 13:59:33,965 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 13:59:33,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-07 13:59:34,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:59:34 BoogieIcfgContainer [2020-07-07 13:59:34,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:59:34,009 INFO L168 Benchmark]: Toolchain (without parser) took 13363.76 ms. Allocated memory was 146.3 MB in the beginning and 370.7 MB in the end (delta: 224.4 MB). Free memory was 104.2 MB in the beginning and 322.6 MB in the end (delta: -218.4 MB). Peak memory consumption was 6.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:59:34,017 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 146.3 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-07 13:59:34,022 INFO L168 Benchmark]: CACSL2BoogieTranslator took 405.82 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 103.7 MB in the beginning and 179.9 MB in the end (delta: -76.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:59:34,024 INFO L168 Benchmark]: Boogie Preprocessor took 45.51 ms. Allocated memory is still 203.4 MB. Free memory was 179.9 MB in the beginning and 177.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:59:34,024 INFO L168 Benchmark]: RCFGBuilder took 536.38 ms. Allocated memory is still 203.4 MB. Free memory was 177.9 MB in the beginning and 145.2 MB in the end (delta: 32.7 MB). Peak memory consumption was 32.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:59:34,025 INFO L168 Benchmark]: TraceAbstraction took 12366.44 ms. Allocated memory was 203.4 MB in the beginning and 370.7 MB in the end (delta: 167.2 MB). Free memory was 144.5 MB in the beginning and 322.6 MB in the end (delta: -178.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 13:59:34,034 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 146.3 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 405.82 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 103.7 MB in the beginning and 179.9 MB in the end (delta: -76.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.51 ms. Allocated memory is still 203.4 MB. Free memory was 179.9 MB in the beginning and 177.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 536.38 ms. Allocated memory is still 203.4 MB. Free memory was 177.9 MB in the beginning and 145.2 MB in the end (delta: 32.7 MB). Peak memory consumption was 32.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12366.44 ms. Allocated memory was 203.4 MB in the beginning and 370.7 MB in the end (delta: 167.2 MB). Free memory was 144.5 MB in the beginning and 322.6 MB in the end (delta: -178.0 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: 12.2s, OverallIterations: 20, TraceHistogramMax: 3, AutomataDifference: 8.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2577 SDtfs, 3591 SDslu, 10026 SDs, 0 SdLazy, 6371 SolverSat, 268 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 315 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 2.2s 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: 0.5s AutomataMinimizationTime, 19 MinimizatonAttempts, 1535 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...