/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:43:30,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:43:30,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:43:30,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:43:30,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:43:30,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:43:30,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:43:30,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:43:30,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:43:30,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:43:30,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:43:30,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:43:30,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:43:30,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:43:30,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:43:30,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:43:30,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:43:30,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:43:30,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:43:30,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:43:30,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:43:30,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:43:30,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:43:30,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:43:30,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 18:43:30,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 18:43:30,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 18:43:30,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 18:43:30,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 18:43:30,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 18:43:30,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 18:43:30,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 18:43:30,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 18:43:30,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 18:43:30,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 18:43:30,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 18:43:30,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 18:43:30,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 18:43:30,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:43:30,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:43:30,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:43:30,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:43:30,666 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:43:30,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:43:30,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:43:30,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:43:30,669 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:43:30,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:43:30,669 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:43:30,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:43:30,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:43:30,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:43:30,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:43:30,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:43:30,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:43:30,671 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:43:30,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:43:30,671 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:43:30,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:43:30,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:43:30,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:43:30,672 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:43:30,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:43:30,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:43:30,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:43:30,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:43:30,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:43:30,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:43:30,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:43:30,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:43:30,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:43:30,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:43:31,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:43:31,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:43:31,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:43:31,073 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:43:31,073 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:43:31,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-10-23 18:43:31,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c99876743/1fa2f3e4b0df428c935b57d0ca4ff9f6/FLAG25b7bfa9d [2020-10-23 18:43:31,861 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:43:31,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-10-23 18:43:31,874 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c99876743/1fa2f3e4b0df428c935b57d0ca4ff9f6/FLAG25b7bfa9d [2020-10-23 18:43:32,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c99876743/1fa2f3e4b0df428c935b57d0ca4ff9f6 [2020-10-23 18:43:32,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:43:32,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:43:32,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:32,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:43:32,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:43:32,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:32" (1/1) ... [2020-10-23 18:43:32,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cef8b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:32, skipping insertion in model container [2020-10-23 18:43:32,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:32" (1/1) ... [2020-10-23 18:43:32,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:43:32,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:43:32,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:32,435 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:43:32,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:32,501 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:43:32,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:32 WrapperNode [2020-10-23 18:43:32,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:32,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:43:32,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:43:32,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:43:32,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:32" (1/1) ... [2020-10-23 18:43:32,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:32" (1/1) ... [2020-10-23 18:43:32,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:32" (1/1) ... [2020-10-23 18:43:32,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:32" (1/1) ... [2020-10-23 18:43:32,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:32" (1/1) ... [2020-10-23 18:43:32,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:32" (1/1) ... [2020-10-23 18:43:32,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:32" (1/1) ... [2020-10-23 18:43:32,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:43:32,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:43:32,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:43:32,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:43:32,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:32" (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 [2020-10-23 18:43:32,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:43:32,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:43:32,657 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:43:32,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:43:32,658 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-10-23 18:43:32,658 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-10-23 18:43:32,659 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:43:32,659 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:43:32,659 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:43:32,660 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:43:32,660 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:43:32,660 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:43:32,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:43:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:43:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-10-23 18:43:32,663 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-10-23 18:43:32,663 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-10-23 18:43:32,664 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-10-23 18:43:32,664 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-10-23 18:43:32,664 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-10-23 18:43:32,665 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-10-23 18:43:32,666 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-10-23 18:43:32,666 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-10-23 18:43:32,666 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-10-23 18:43:32,666 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-10-23 18:43:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-10-23 18:43:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-10-23 18:43:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-10-23 18:43:32,671 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-10-23 18:43:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-10-23 18:43:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-10-23 18:43:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-10-23 18:43:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-10-23 18:43:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-10-23 18:43:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-10-23 18:43:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-10-23 18:43:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-10-23 18:43:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-10-23 18:43:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-10-23 18:43:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-10-23 18:43:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:43:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:43:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:43:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:43:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:43:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:43:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:43:33,197 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:43:33,197 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 18:43:33,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:33 BoogieIcfgContainer [2020-10-23 18:43:33,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:43:33,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:43:33,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:43:33,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:43:33,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:43:32" (1/3) ... [2020-10-23 18:43:33,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5820108b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:33, skipping insertion in model container [2020-10-23 18:43:33,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:32" (2/3) ... [2020-10-23 18:43:33,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5820108b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:33, skipping insertion in model container [2020-10-23 18:43:33,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:33" (3/3) ... [2020-10-23 18:43:33,215 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-10-23 18:43:33,230 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:43:33,236 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:43:33,255 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:43:33,305 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:43:33,306 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:43:33,306 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:43:33,306 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:43:33,306 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:43:33,307 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:43:33,307 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:43:33,307 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:43:33,337 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-23 18:43:33,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:43:33,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:33,351 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] [2020-10-23 18:43:33,351 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:33,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:33,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1243057979, now seen corresponding path program 1 times [2020-10-23 18:43:33,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:33,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660289935] [2020-10-23 18:43:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:33,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:33,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 18:43:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:33,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660289935] [2020-10-23 18:43:33,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:33,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:43:33,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851846790] [2020-10-23 18:43:33,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:43:33,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:33,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:43:33,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:43:33,739 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-10-23 18:43:33,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:33,907 INFO L93 Difference]: Finished difference Result 100 states and 133 transitions. [2020-10-23 18:43:33,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:43:33,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-23 18:43:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:33,918 INFO L225 Difference]: With dead ends: 100 [2020-10-23 18:43:33,918 INFO L226 Difference]: Without dead ends: 45 [2020-10-23 18:43:33,922 INFO L677 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 [2020-10-23 18:43:33,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-23 18:43:33,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-23 18:43:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-23 18:43:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2020-10-23 18:43:33,971 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 31 [2020-10-23 18:43:33,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:33,972 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2020-10-23 18:43:33,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:43:33,972 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2020-10-23 18:43:33,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-23 18:43:33,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:33,974 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] [2020-10-23 18:43:33,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:43:33,975 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:33,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1651644, now seen corresponding path program 1 times [2020-10-23 18:43:33,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:33,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718635842] [2020-10-23 18:43:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:34,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:34,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 18:43:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:34,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718635842] [2020-10-23 18:43:34,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:34,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:43:34,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192633675] [2020-10-23 18:43:34,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:43:34,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:34,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:43:34,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:43:34,100 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 4 states. [2020-10-23 18:43:34,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:34,245 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2020-10-23 18:43:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:43:34,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-23 18:43:34,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:34,248 INFO L225 Difference]: With dead ends: 82 [2020-10-23 18:43:34,248 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 18:43:34,249 INFO L677 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 [2020-10-23 18:43:34,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 18:43:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-23 18:43:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-23 18:43:34,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-23 18:43:34,261 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 35 [2020-10-23 18:43:34,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:34,262 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-23 18:43:34,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:43:34,262 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-23 18:43:34,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-23 18:43:34,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:34,264 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] [2020-10-23 18:43:34,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:43:34,264 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:34,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:34,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1803786690, now seen corresponding path program 1 times [2020-10-23 18:43:34,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:34,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771310400] [2020-10-23 18:43:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:34,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:34,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 18:43:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:34,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771310400] [2020-10-23 18:43:34,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:34,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:43:34,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369164286] [2020-10-23 18:43:34,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:34,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:34,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:34,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:34,458 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 6 states. [2020-10-23 18:43:34,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:34,668 INFO L93 Difference]: Finished difference Result 110 states and 140 transitions. [2020-10-23 18:43:34,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:43:34,669 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-23 18:43:34,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:34,672 INFO L225 Difference]: With dead ends: 110 [2020-10-23 18:43:34,672 INFO L226 Difference]: Without dead ends: 73 [2020-10-23 18:43:34,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:43:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-23 18:43:34,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-23 18:43:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-23 18:43:34,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2020-10-23 18:43:34,689 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 35 [2020-10-23 18:43:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:34,690 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2020-10-23 18:43:34,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:43:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2020-10-23 18:43:34,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-23 18:43:34,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:34,692 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] [2020-10-23 18:43:34,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:43:34,692 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:34,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:34,693 INFO L82 PathProgramCache]: Analyzing trace with hash 893257342, now seen corresponding path program 1 times [2020-10-23 18:43:34,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:34,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087242798] [2020-10-23 18:43:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:34,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:34,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 18:43:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:34,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087242798] [2020-10-23 18:43:34,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:34,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 18:43:34,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115645378] [2020-10-23 18:43:34,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:43:34,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:34,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:43:34,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:43:34,903 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand 9 states. [2020-10-23 18:43:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:35,277 INFO L93 Difference]: Finished difference Result 162 states and 211 transitions. [2020-10-23 18:43:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:43:35,277 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-23 18:43:35,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:35,279 INFO L225 Difference]: With dead ends: 162 [2020-10-23 18:43:35,279 INFO L226 Difference]: Without dead ends: 92 [2020-10-23 18:43:35,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:43:35,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-23 18:43:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 61. [2020-10-23 18:43:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-23 18:43:35,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-10-23 18:43:35,291 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 35 [2020-10-23 18:43:35,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:35,292 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-10-23 18:43:35,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:43:35,292 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-10-23 18:43:35,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-23 18:43:35,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:35,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:35,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:43:35,294 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:35,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:35,295 INFO L82 PathProgramCache]: Analyzing trace with hash 75608892, now seen corresponding path program 1 times [2020-10-23 18:43:35,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:35,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639916783] [2020-10-23 18:43:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:35,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:35,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 18:43:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:35,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639916783] [2020-10-23 18:43:35,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:35,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 18:43:35,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699484461] [2020-10-23 18:43:35,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:43:35,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:35,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:43:35,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:43:35,496 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 8 states. [2020-10-23 18:43:35,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:35,949 INFO L93 Difference]: Finished difference Result 117 states and 148 transitions. [2020-10-23 18:43:35,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:43:35,950 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-23 18:43:35,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:35,952 INFO L225 Difference]: With dead ends: 117 [2020-10-23 18:43:35,953 INFO L226 Difference]: Without dead ends: 113 [2020-10-23 18:43:35,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:43:35,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-23 18:43:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2020-10-23 18:43:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-23 18:43:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 117 transitions. [2020-10-23 18:43:35,984 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 117 transitions. Word has length 35 [2020-10-23 18:43:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:35,985 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 117 transitions. [2020-10-23 18:43:35,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:43:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 117 transitions. [2020-10-23 18:43:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 18:43:35,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:35,990 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] [2020-10-23 18:43:35,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:43:35,990 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:35,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:35,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1809033399, now seen corresponding path program 1 times [2020-10-23 18:43:35,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:35,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108099916] [2020-10-23 18:43:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:36,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:36,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-23 18:43:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:36,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108099916] [2020-10-23 18:43:36,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:36,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:43:36,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812669799] [2020-10-23 18:43:36,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:43:36,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:36,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:43:36,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:43:36,088 INFO L87 Difference]: Start difference. First operand 93 states and 117 transitions. Second operand 5 states. [2020-10-23 18:43:36,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:36,221 INFO L93 Difference]: Finished difference Result 157 states and 198 transitions. [2020-10-23 18:43:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:43:36,222 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-10-23 18:43:36,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:36,226 INFO L225 Difference]: With dead ends: 157 [2020-10-23 18:43:36,226 INFO L226 Difference]: Without dead ends: 101 [2020-10-23 18:43:36,227 INFO L677 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 [2020-10-23 18:43:36,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-23 18:43:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-23 18:43:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-23 18:43:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2020-10-23 18:43:36,238 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 37 [2020-10-23 18:43:36,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:36,239 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2020-10-23 18:43:36,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:43:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2020-10-23 18:43:36,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 18:43:36,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:36,240 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] [2020-10-23 18:43:36,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:43:36,241 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:36,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:36,242 INFO L82 PathProgramCache]: Analyzing trace with hash -185111307, now seen corresponding path program 1 times [2020-10-23 18:43:36,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:36,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652091041] [2020-10-23 18:43:36,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:36,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:36,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-23 18:43:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:36,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652091041] [2020-10-23 18:43:36,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:36,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:43:36,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719033900] [2020-10-23 18:43:36,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:43:36,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:36,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:43:36,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:43:36,325 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand 7 states. [2020-10-23 18:43:36,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:36,536 INFO L93 Difference]: Finished difference Result 196 states and 243 transitions. [2020-10-23 18:43:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:43:36,538 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-10-23 18:43:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:36,540 INFO L225 Difference]: With dead ends: 196 [2020-10-23 18:43:36,540 INFO L226 Difference]: Without dead ends: 122 [2020-10-23 18:43:36,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:43:36,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-23 18:43:36,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2020-10-23 18:43:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-23 18:43:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2020-10-23 18:43:36,566 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 37 [2020-10-23 18:43:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:36,566 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2020-10-23 18:43:36,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:43:36,566 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2020-10-23 18:43:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 18:43:36,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:36,568 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:43:36,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 18:43:36,568 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:36,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:36,569 INFO L82 PathProgramCache]: Analyzing trace with hash 70536640, now seen corresponding path program 1 times [2020-10-23 18:43:36,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:36,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397437019] [2020-10-23 18:43:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:36,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:36,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 18:43:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:43:36,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397437019] [2020-10-23 18:43:36,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:36,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 18:43:36,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353684332] [2020-10-23 18:43:36,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:43:36,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:36,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:43:36,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:43:36,729 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 9 states. [2020-10-23 18:43:37,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:37,132 INFO L93 Difference]: Finished difference Result 175 states and 216 transitions. [2020-10-23 18:43:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:43:37,133 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-23 18:43:37,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:37,134 INFO L225 Difference]: With dead ends: 175 [2020-10-23 18:43:37,134 INFO L226 Difference]: Without dead ends: 127 [2020-10-23 18:43:37,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:43:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-23 18:43:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 106. [2020-10-23 18:43:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-23 18:43:37,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 129 transitions. [2020-10-23 18:43:37,157 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 129 transitions. Word has length 40 [2020-10-23 18:43:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:37,157 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 129 transitions. [2020-10-23 18:43:37,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:43:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 129 transitions. [2020-10-23 18:43:37,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 18:43:37,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:37,160 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:43:37,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 18:43:37,162 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:37,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:37,163 INFO L82 PathProgramCache]: Analyzing trace with hash -764578183, now seen corresponding path program 1 times [2020-10-23 18:43:37,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:37,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137390877] [2020-10-23 18:43:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:37,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:37,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-23 18:43:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:37,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137390877] [2020-10-23 18:43:37,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436896563] [2020-10-23 18:43:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:37,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:43:37,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:37,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:37,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:37,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2020-10-23 18:43:37,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736370808] [2020-10-23 18:43:37,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:43:37,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:37,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:43:37,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:43:37,475 INFO L87 Difference]: Start difference. First operand 106 states and 129 transitions. Second operand 8 states. [2020-10-23 18:43:37,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:37,901 INFO L93 Difference]: Finished difference Result 259 states and 320 transitions. [2020-10-23 18:43:37,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:43:37,901 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-10-23 18:43:37,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:37,906 INFO L225 Difference]: With dead ends: 259 [2020-10-23 18:43:37,906 INFO L226 Difference]: Without dead ends: 181 [2020-10-23 18:43:37,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:43:37,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-23 18:43:37,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 143. [2020-10-23 18:43:37,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-23 18:43:37,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2020-10-23 18:43:37,941 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 42 [2020-10-23 18:43:37,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:37,941 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2020-10-23 18:43:37,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:43:37,941 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2020-10-23 18:43:37,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 18:43:37,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:37,945 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-23 18:43:38,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-23 18:43:38,162 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:38,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1640570633, now seen corresponding path program 2 times [2020-10-23 18:43:38,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:38,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285483175] [2020-10-23 18:43:38,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:38,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:38,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 18:43:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:38,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285483175] [2020-10-23 18:43:38,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258767668] [2020-10-23 18:43:38,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:38,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:43:38,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:38,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-23 18:43:38,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:38,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:38,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2020-10-23 18:43:38,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840021241] [2020-10-23 18:43:38,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:43:38,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:38,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:43:38,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:43:38,707 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand 19 states. [2020-10-23 18:43:39,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:39,496 INFO L93 Difference]: Finished difference Result 289 states and 354 transitions. [2020-10-23 18:43:39,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:43:39,497 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-23 18:43:39,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:39,500 INFO L225 Difference]: With dead ends: 289 [2020-10-23 18:43:39,500 INFO L226 Difference]: Without dead ends: 196 [2020-10-23 18:43:39,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:43:39,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-23 18:43:39,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 135. [2020-10-23 18:43:39,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-23 18:43:39,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 166 transitions. [2020-10-23 18:43:39,514 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 166 transitions. Word has length 47 [2020-10-23 18:43:39,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:39,514 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 166 transitions. [2020-10-23 18:43:39,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:43:39,515 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 166 transitions. [2020-10-23 18:43:39,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 18:43:39,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:39,516 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-23 18:43:39,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-23 18:43:39,730 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:39,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:39,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1421715915, now seen corresponding path program 1 times [2020-10-23 18:43:39,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:39,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145138451] [2020-10-23 18:43:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:39,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:39,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 18:43:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:39,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145138451] [2020-10-23 18:43:39,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473984218] [2020-10-23 18:43:39,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:39,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:43:39,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:40,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:40,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:43:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:40,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:40,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2020-10-23 18:43:40,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218871011] [2020-10-23 18:43:40,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:43:40,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:40,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:43:40,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:43:40,265 INFO L87 Difference]: Start difference. First operand 135 states and 166 transitions. Second operand 19 states. [2020-10-23 18:43:41,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:41,035 INFO L93 Difference]: Finished difference Result 221 states and 272 transitions. [2020-10-23 18:43:41,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 18:43:41,036 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-23 18:43:41,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:41,038 INFO L225 Difference]: With dead ends: 221 [2020-10-23 18:43:41,038 INFO L226 Difference]: Without dead ends: 217 [2020-10-23 18:43:41,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:43:41,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-23 18:43:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 154. [2020-10-23 18:43:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-23 18:43:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 195 transitions. [2020-10-23 18:43:41,053 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 195 transitions. Word has length 47 [2020-10-23 18:43:41,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:41,054 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 195 transitions. [2020-10-23 18:43:41,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:43:41,054 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 195 transitions. [2020-10-23 18:43:41,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 18:43:41,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:41,055 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-23 18:43:41,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-23 18:43:41,270 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:41,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:41,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2008521929, now seen corresponding path program 1 times [2020-10-23 18:43:41,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:41,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567854103] [2020-10-23 18:43:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:41,320 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:41,353 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:41,400 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:43:41,400 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:43:41,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 18:43:41,473 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-10-23 18:43:41,479 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-10-23 18:43:41,487 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-10-23 18:43:41,488 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-10-23 18:43:41,488 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-10-23 18:43:41,488 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-10-23 18:43:41,489 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-10-23 18:43:41,489 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-10-23 18:43:41,491 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-10-23 18:43:41,492 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-10-23 18:43:41,493 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-10-23 18:43:41,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:43:41 BoogieIcfgContainer [2020-10-23 18:43:41,519 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:43:41,523 INFO L168 Benchmark]: Toolchain (without parser) took 9337.37 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 126.7 MB in the beginning and 197.4 MB in the end (delta: -70.7 MB). Peak memory consumption was 119.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:41,526 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory was 124.1 MB in the beginning and 124.0 MB in the end (delta: 83.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:43:41,530 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.36 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 114.7 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:41,531 INFO L168 Benchmark]: Boogie Preprocessor took 64.45 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 112.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:41,532 INFO L168 Benchmark]: RCFGBuilder took 626.28 ms. Allocated memory is still 151.0 MB. Free memory was 112.7 MB in the beginning and 118.8 MB in the end (delta: -6.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:41,533 INFO L168 Benchmark]: TraceAbstraction took 8314.71 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 118.3 MB in the beginning and 197.4 MB in the end (delta: -79.1 MB). Peak memory consumption was 111.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:41,539 INFO L339 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 151.0 MB. Free memory was 124.1 MB in the beginning and 124.0 MB in the end (delta: 83.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 314.36 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 114.7 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 64.45 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 112.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 626.28 ms. Allocated memory is still 151.0 MB. Free memory was 112.7 MB in the beginning and 118.8 MB in the end (delta: -6.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8314.71 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 118.3 MB in the beginning and 197.4 MB in the end (delta: -79.1 MB). Peak memory consumption was 111.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch7 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L85] char A [2 + 2 + 4 +1]; [L86] A[2 + 2 + 4] = 0 VAL [A={6:0}] [L87] CALL parse_expression_list (A) VAL [str={6:0}] [L59] int start=0, i=-1, j=-1; [L60] char str2[2]; VAL [i=-1, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}] [L61] COND FALSE !(!str) VAL [i=-1, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}] [L63] i++ [L64] str[i] [L65] case 0: VAL [i=0, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=-1] [L80] EXPR str[i] VAL [i=0, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=-1] [L80] COND TRUE str[i] != 0 [L63] i++ [L64] str[i] [L65] case 0: VAL [i=1, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=54] [L80] EXPR str[i] VAL [i=1, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=54] [L80] COND TRUE str[i] != 0 [L63] i++ [L64] str[i] [L65] case 0: VAL [i=2, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0] [L66] EXPR str[start] [L66] (str[start] == ' ') || (str[start] == '\t') [L66] EXPR str[start] [L66] (str[start] == ' ') || (str[start] == '\t') VAL [(str[start] == ' ') || (str[start] == '\t')=0, i=2, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[start]=-1, str[start]=-1] [L66] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L67] EXPR str[start] VAL [i=2, j=-1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[start]=-1] [L67] COND FALSE !(str[start] == '"') [L68] j = i-1 VAL [i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0] [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L69] EXPR str[j] [L69] EXPR (str[j] == ' ') || (str[j] == '\t') [L69] EXPR str[j] [L69] EXPR (str[j] == ' ') || (str[j] == '\t') VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[j]=54, str[j]=54] [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=0, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[j]=54, str[j]=54] [L69] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L70] (0 < j) && (str[j] == '"') [L70] EXPR str[j] [L70] (0 < j) && (str[j] == '"') VAL [(0 < j) && (str[j] == '"')=0, i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0, str[j]=54] [L70] COND FALSE !((0 < j) && (str[j] == '"')) [L71] COND TRUE start<=j VAL [i=2, j=1, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0] [L72] CALL r_strncpy(str2, str+start, j-start+1) VAL [\old(n)=2, dest={3:0}, src={6:0}] [L41] return strncpy(dest,src,n); [L72] RET r_strncpy(str2, str+start, j-start+1) VAL [i=2, j=1, r_strncpy(str2, str+start, j-start+1)={52:55}, start=0, str={6:0}, str={6:0}, str2={3:0}, str[i]=0] [L73] CALL __VERIFIER_assert(j - start + 1 < 2) VAL [\old(cond)=0] [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L15] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "verisec_OpenSER_cases1_stripFullBoth_arr.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.0s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 552 SDtfs, 1105 SDslu, 1788 SDs, 0 SdLazy, 2313 SolverSat, 312 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 290 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 283 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 604 NumberOfCodeBlocks, 604 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 543 ConstructedInterpolants, 0 QuantifiedInterpolants, 77053 SizeOfPredicates, 8 NumberOfNonLiveVariables, 599 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 2/42 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...